News: Globalhttp://www.chalmers.se/sv/nyheterNews related to Chalmers University of TechnologyThu, 18 Apr 2019 08:48:02 +0200http://www.chalmers.se/sv/nyheterhttps://www.chalmers.se/en/departments/physics/news/Pages/Tailor-made-materials-with-ultrafast-connections.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/Tailor-made-materials-with-ultrafast-connections.aspxTailor-made materials with ultrafast connections<p><b>Through magic twist angles and unique energy states, it is possible to design tailor-made, atomically thin materials that could be invaluable for future electronics. Now, researchers at Chalmers University of Technology, Sweden, and Regensburg University in Germany have shed light on the ultrafast dynamics in these novel materials. The results were recently published in the prestigious journal Nature Materials.​​​</b></p><div><div>Imagine you are building an energy-efficient and super-thin solar cell. You have one material that conducts current and another that absorbs light. You must therefore use both materials to achieve the desired properties, and the result may not be as thin as you hoped.</div> <div><br /></div> <div>Now imagine instead that you have atomically thin layers of each material, that you place on top of each other. You twist one layer towards the other a certain amount, and suddenly a new connection is formed, with special energy states – known as interlayer excitons – that exist in both layers. You now have your desired material at an atomically thin level.</div> <div><br /></div> <div>Ermin Malic, researcher at Chalmers University of Technology, in collaboration with German research colleagues around Rupert Huber at Regensburg University, has now succeeded in showing how fast these states are formed and how they can be tuned through twisting angles. Stacking and twisting atomically thin materials like Lego bricks, into new materials known as ‘heterostructures’, is an area of research that is still at its beginning.</div></div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/F/Blandade%20dimensioner%20inne%20i%20artikel/ErminMalic_190415_05_350xwebb.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" /><div>“These heterostructures have tremendous potential, as we can design tailor-made materials. The technology could be used in solar cells, flexible electronics, and even possibly in quantum computers in the future,” says Ermin Malic, Professor at the Department of Physics at Chalmers.</div> <div><br /></div> <div>Ermin Malic and his doctoral students Simon Ovesen and Samuel Brem recently collaborated with researchers at Regensburg University. The Swedish group has been responsible for the theoretical part of the project, while the German researchers conducted the experiments. For the first time, with the help of unique methods, they succeeded in revealing the secrets behind the ultrafast formation and dynamics of interlayer excitons in heterostructure materials. They used two different lasers to follow the sequence of events. By twisting atomically thin materials towards each other, they have demonstrated that it is possible to control how quickly the exciton dynamics occurs.</div> <div><br /></div> <div>“This emerging field of research is equally fascinating and interesting for academia as it is for industry,” says Ermin Malic. He leads the Chalmers Graphene Centre, which gathers research, education and innovation around graphene, other atomically thin materials and heterostructures under one common umbrella.</div> <div><br /></div> <div>These kinds of promising materials are known as two-dimensional (2D) materials, as they only consist of an atomically thin layer. Due to their remarkable properties, they are considered to have great potential in various fields of technology. Graphene, consisting of a single layer of carbon atoms, is the best-known example. It is starting to be applied in industry, for example in super-fast and highly sensitive detectors, flexible electronic devices and multifunctional materials in  automotive, aerospace and packaging industries.</div> <div><br /></div> <div>But graphene is just one of many 2D materials that could be of great benefit to our society. There is currently a lot of discussion about heterostructures consisting of graphene combined with other 2D materials. In just a short time, research on heterostructures has made great advances, and the journal Nature has recently published several breakthrough articles in this field of research. </div> <div><br /></div> <div>At Chalmers, several research groups are working at the forefront of graphene. The Graphene Centre is now investing in new infrastructure in order to be able to broaden the research area to include other 2D materials and heterostructures as well.</div> <div><br /></div> <div>“We want to establish a strong and dynamic hub for 2D materials here at Chalmers, so that we can build bridges to industry and ensure that our knowledge will benefit society,” says Ermin Malic.</div></div> <div>​<br /></div> <div></div> <div><span style="background-color:initial">Text and image: Mia Halleröd Palmgren, </span><a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se</a><br /></div> <div>Translation to English: Joshua Worth,<a href="mailto:%20joshua.worth@chalmers.se"> joshua.worth@chalmers.se</a></div> <div><br /></div> <div>Read the scientific paper <span style="background-color:initial"><a href="https://www.nature.com/articles/s41563-019-0337-0">Ultrafast transition between exciton phases in van der Waals heterostructures</a> </span><span style="background-color:initial">in Nature Materials.</span></div> <div><span style="background-color:initial"><br /></span></div> <div><div><a href="https://idw-online.de/en/news713803"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read the press release from Regensburg University, Germany. </a></div> <div><br /></div> <div><a href="/sv/centrum/graphene/Sidor/default.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Read more about the Graphene Centre at Chalmers (GCC)</a></div> <span style="background-color:initial"></span></div> <div><br /></div> <h3 class="chalmersElement-H3">For more information: </h3> <div><a href="/sv/personal/Sidor/ermin-malic.aspx">Ermin Malic,​</a> Professor, Department of Physics and Director of the Graphene Centre, Chalmers University of Technology, Sweden, +46 31 772 32 63, +46 70 840 49 53, <a href="mailto:ermin.malic@chalmers.se">ermin.malic@chalmers.se​</a></div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/F/750x340/SamuelBremErminMalic_20190415_bannerwebb.jpg" alt="" style="margin:5px" /><br />Professor Ermin Malic (to the right) and his doctoral students Samuel Brem (left) and <span style="background-color:initial">Simon Ovesen (not pictured) r</span><span style="background-color:initial">ecently collaborated with researchers at Regensburg University. The Swedish group has been responsible for the theoretical part of the project, while the German researchers conducted the experiments.</span><span style="background-color:initial"> </span><span style="background-color:initial">​</span></div> <span></span><div><span style="background-color:initial"></span></div>Wed, 17 Apr 2019 07:00:00 +0200https://www.chalmers.se/en/departments/e2/news/Pages/Smarter-charging-is-key-to-electromobility.aspxhttps://www.chalmers.se/en/departments/e2/news/Pages/Smarter-charging-is-key-to-electromobility.aspxSmarter charging is key to electromobility<p><b>​For electric vehicles to be implemented on a large ​scale, smart solutions for charging are required. Currently, development of digital systems is under way that in real time will control and distribute the available power, depending on such factors as how much each driver is prepared to pay, and how fast the vehicle must be fully charged for the next trip.</b></p>​<img src="/SiteCollectionImages/Institutioner/E2/Nyheter/Smartare%20laddning%20nyckeln%20till%20elektromobilitet/Lang_Tong2_300px.jpg" class="chalmersPosition-FloatLeft" alt="Lang Tong" style="margin:5px" /><span style="background-color:initial">During nine months, Chalmers University of Technology is reinforced by Professor Lang Tong from Cornell University, USA. As a guest professor, one of his tasks will be to contribute to Chalmers' research in the field of electric power engineering, primarily focusing on digitalization in large-scale infrastructure for the charging of electric vehicles.</span><div><br /></div> <div>“Being a researcher interested in electromobility, Chalmers is an attractive place to visit”, says Lang Tong. “The close relation to industry as well as Chalmers' often application-driven research on electrified vehicles are interesting to me. In return, I hope to be able to contribute with my knowledge of applying ideas from artificial intelligence and data science in power and energy systems.”</div> <div><br /></div> <div>Lang Tong was in 2018 awarded the prestigious Fulbright Distinguished Chair in Alternative Energy Technology. His visit to Chalmers is funded by the Fulbright Scholar Program, a bi-national organization promoting exchange between Sweden and the US with government funding from both nations.</div> <div><br /></div> <h5 class="chalmersElement-H5">Developing smart charging of electrified vehicles</h5> <div>He is currently engaged in a collaborative research project at the department of Electrical Engineering aiming at developing technology and software systems for smart charging of electrified vehicles.</div> <div><br /></div> <div>“In 12-14 years, the proportion of electric cars is forecasted to increase to about 10 percent of the vehicle fleet”, Lang Tong says. “The infrastructure for charging the vehicles must, by then, be upgraded to become sufficient and robust enough to handle the increasing demand. Otherwise the lack of infrastructure risks hampering the development.”</div> <div><br /></div> <div>What will happen if thousands of drivers in Gothenburg, when they get home from work in the evening, plug in their electric cars for charging at the same time?</div> <div><br /></div> <div>“Well, it won´t be possible to charge all those vehicles at the same time”, Lang Tong notes. “The local distribution network will get overloaded; the power demand will be too heavy.”</div> <div><br /></div> <div>Instead, the solution lies in applying digital systems that in real time control and distribute the available power depending on the demand. </div> <div><br /></div> <div>“To match supply and demand of energy the development of smart systems is required. The systems need to be so smart that they also can take into account such factors as how much each driver is prepared to pay, and how fast the vehicles must be fully charged for the next trip.”</div> <div><br /></div> <div>At times, when there is a high strain on the grid from prioritized electrical equipment, the charging of some vehicles could be planned to be conducted later. Or the stored energy in the batteries of the car could even be used as a reinforcement or backup to the grid.</div> <div><br /></div> <h5 class="chalmersElement-H5">The potential of digitalization</h5> <div>“I am very pleased with the help Lang Tong gives us to grasp the new possibilities and to develop the use of data science and artificial intelligence in our research and in our education of power engineers for the future,” says Jörgen Blennow, Head of division Electric Power Engineering. “Digitalization will emerge in more and more areas, and it is important for us to fully understand what that means in terms of reliability, controllability and optimization of power systems.”</div> <div><br /></div> <div>During his stay at Chalmers, Professor Lang Tong also will be giving courses on machine learning and artificial intelligence in power systems to doctoral students.</div> <div><br /></div> <h5 class="chalmersElement-H5">A sustainable approach to future power systems</h5> <div>“In Scandinavia, I experience that there are strong environmental concerns against the use of fossil fuels, which in turn support the development of more sustainable solutions for transportation, generation of electricity and heating”, Lang Tong says. “However, for the electrified transportation system to be expanded on a large scale, there is also a need for political long-term policies and incentives supporting electrification, along with the expansion of infrastructure for charging the vehicles.”</div> <div><br /></div> <div>“The current power system is going through a transformation”, he continues. “In my opinion, this development is driven by two technological areas that require the attention of the researchers of today. On one hand, there is the development of electromobility. On the other hand, there is the need of an expanded system for solar energy combined with batteries to store the energy. A new power system design will make it possible for people to produce their own energy, in a small scale at home, and to save surplus electricity for later.” </div> <div><br /></div> <div>If electricity does not necessarily need to be produced at the same time as it is consumed, to maintain the balance in the electrical grid, conditions are created for more producers to enter the system, while a higher share of renewable energy sources also can be introduced.</div> <div><br /></div> <h5 class="chalmersElement-H5">Visiting together</h5> <div>Professor Lang Tong and his wife, Professor Qing Zhao also from Cornell University, have accompanied each other to Sweden and Chalmers. Both are visiting professors at the department of Electrical Engineering, <a href="/en/departments/e2/news/Pages/A-Jubilee-Professor-that-unwinds-complexity.aspx">Qing Zhao being a Jubilee Professor of Chalmers 2019.​</a> </div> <div><br /></div> <div>“Indeed, this was a good opportunity for us both to come to Chalmers and Gothenburg. We like the city, not least we enjoy shopping fresh food in the local market.”</div> <div><br /></div> <div>Before Lang Tong leaves Sweden, he would like to visit some more parts of the country. Accompanied by family and friends, he took a trip to Lapland during the winter season to experience the climate and the culture up north.</div> <div><br /></div> <div><div>Text and photo: Yvonne Jonsson​</div></div> <div><br /></div> <div><div><span style="background-color:initial"><a href="https://www.cies.org/" target="_blank"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more about the Fulbright Scholar Progra</a>m</span><span style="background-color:initial">​</span><br /></div></div> <div><span style="background-color:initial"><br /></span></div> <div><strong>​</strong><span style="background-color:initial"><strong>For more information, please contact:</strong></span><br /></div> <div><a href="https://people.ece.cornell.edu/ltong/" target="_blank">Lang Tong</a>, guest professor from Cornell University, USA</div> <div><a href="/en/Staff/Pages/jorgen-blennow.aspx">Jörgen Blennow​</a>, head of division Electric Power Engineering, department of Electrical Engineering, Chalmers University of Technology<br /></div> ​Tue, 16 Apr 2019 07:30:00 +0200https://www.chalmers.se/en/departments/bio/news/Pages/Larsbrink-research-supervisor-of-the-year-2019.aspxhttps://www.chalmers.se/en/departments/bio/news/Pages/Larsbrink-research-supervisor-of-the-year-2019.aspxEnzyme researcher named Research Supervisor of the Year 2018–19<p><b>The Doctoral Student Board at Chalmers University of Technology has decided to grant the award for Research Supervisor of the Year 2018-19 to Assistant professor  Johan Larsbrink, Division of Industrial Biotechnology at the Department of Biology and Biological Technology.</b></p>​“Johan Larsbrink, Assistant professor at the Department of Biology and Biological Engineering, is a scientific and spiritual support among his PhD students”, the motivation letter for this year’s Research Supervisor of the Year Award begins. And it continues: “He [Johan] maintains a positive attitude for his students. His flexibility and empathy have provided his students a unique opportunity for professional and personal developments within and outside his group. Johan’s planning and coordination skills make him an excellent coach.”<br /><br />Indeed, a worthy description of a worthy recipient. And Johan Larsbrink is very proud of the award: <br />&quot;I was happily surprised already when hearing about the nomination, and to be granted the award is of course a great honour. An award like this means a lot to me, since it is a confirmation of that the way I coach my group is appreciated. The award is also very personal, it isn’t about research achievements or other more measurable results, it is about how I am perceived as a leader and as a person.&quot;<br /><br />&quot;For me as supervisor&quot;, Johan continues, &quot;it is important to show commitment and to be involved in the group members’ projects, (though not in too detailed a manor), and to be accessible. I let them know that they are always welcome to my office or to send me an email or a chat message, at any time. And if I am not available right at that moment, I always make sure to come back to them as soon as possible. I want my group members to know and to feel that we are a team working together, but also that they will receive a flexible supervision according to their own, personal needs. I also think it is very important to be upfront about that I don’t know everything and that I always am open and willing to discuss alternative solutions to problems and such, and that I very much appreciate their input.&quot;<br /><br />What Johan says about his ambitions and aims for the coaching of his groups, has been made very clear not only to his group members but also to the awarding committee. In their motivation they conclude: “He [Johan] has also been successful in creating collaboration possibilities with academic and industrial partners. In this way he helps the students for their choice on a future career. Thus, the Doctoral Student Board at Chalmers University of Technology has decided to grant the Research Supervisor of the Year, 2018-19 Award to him.”<br />Mon, 15 Apr 2019 14:15:00 +0200https://www.chalmers.se/en/news/Pages/more-student-housing-is-being-built-in-gothenburg.aspxhttps://www.chalmers.se/en/news/Pages/more-student-housing-is-being-built-in-gothenburg.aspxMore student housing is being built in Gothenburg<p><b>​Finding suitable accommodation is an issue for many new students in Gothenburg. Chalmers is dedicated to make sure that the student housing situation improves, and work is underway to build new student residences close to Chalmers campus Johanneberg.</b></p><p>​<span style="background-color:initial">The project Gbg 7000+, that Chalmers is taking part in, intends to build 7 000 new student residences in ​Gothenburg between the years 2016 and 2026. Since the project started, around 900 new student apartments have been built, and there are more to come already this year. <br /><br /></span></p> <h4 class="chalmersElement-H4">Over 200 new student apartments in 2019</h4> <p><span style="background-color:initial">One of the ongoing building projects is called Gibraltar Guesthouse, located right by Chalmers campus Johanneberg. 100 new student residences are currently being built there and the residences are intended for international master students and guest researchers, with planned occupancy beginning in August 2019. <br /></span><span style="background-color:initial"><br />Another project that has recently been completed, the Uddjaur quarter, is also located close to campus Johanneberg and consists of 118 student residences, mainly studio apartments. The Uddjaur project has also been certified as a green building by Sweden Green Building Council. By checking the building with indicators regarding energy use, indoor environment and materials, the certification ensures that the building is good both for the environment and for those who live there. <br /><br /></span></p> <h4 class="chalmersElement-H4">Easy commute to the university is key</h4> <p><span style="background-color:initial">One important part in the Gbg7000+ project is that the residences should be located so that it is easy to travel to and from the university. The residences are spread out in different parts of Gothenburg but are all within easy commuting distance to Chalmers campus, and some of them are even within walking distance. At most, it takes 30 minutes with public transport from the student residence to Chalmers.<br /></span><span style="background-color:initial"><br />The size of the new residences varies between studio apartments, two-room apartments and three-room apartments, but they all keep the same standard. All new student residences are equipped with a bathroom including a shower, a kitchen including a fridge and a freezer, warm water, electricity and internet.<br /><br /></span></p> <h4 class="chalmersElement-H4">More student housing in the coming years</h4> <p><span style="background-color:initial">Several other projects are planned to help increase the amount of student housing in Gothenburg. In 2020, 54 new student residences will be finished right by two existing student houses by campus Johanneberg. <br /></span><span style="background-color:initial"><br />The biggest upcoming project planned is called Holtermanska, located right by Chalmers, that consists of 450 new student apartments. The Holtermanska project does not currently have a set start date for construction, but planned occupancy for the residences is currently in 2023 and the residences will consist of 350 studio apartments, 35 two-room apartments and 65 three-room apartments.<br /><br /></span></p> <p><strong>Read more</strong></p> <p><a href="/en/staff/Pages/mikael-enelund.aspx" style="background-color:rgb(255, 255, 255);outline:currentcolor none 0px"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" /></a> <a href="/en/education/living-in-gothenburg/Pages/accommodation.aspx" style="background-color:rgb(255, 255, 255)">Learn more about student housing in Gothenburg</a><span style="background-color:initial;color:rgb(33, 33, 33)">.​</span><strong><br /></strong></p> <p><a href="/en/staff/Pages/mikael-enelund.aspx" style="background-color:rgb(255, 255, 255);outline:currentcolor none 0px"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" /></a> <a href="/en/news/Pages/Chalmers-education-the-best-in-Europe-.aspx">“Students experience Chalmers education as the best in Europe” ​</a>– About the International Student Barometer, where the question about student accommodation in Gothenburg is raised.</p> <p><br /></p> <p><strong>Text: </strong>Sophia Kristensson</p>Mon, 15 Apr 2019 09:00:00 +0200https://www.chalmers.se/en/departments/physics/news/Pages/Worlds-fastest-hydrogen-sensor-could-pave-the-way-for-clean-hydrogen-energy.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/Worlds-fastest-hydrogen-sensor-could-pave-the-way-for-clean-hydrogen-energy.aspxWorld&#39;s fastest hydrogen sensor could pave the way for clean energy<p><b>Hydrogen is a clean and renewable energy carrier that can power vehicles, with water as the only emission. Unfortunately, hydrogen gas is highly flammable when mixed with air, so very efficient and effective sensors are needed. Now, researchers from Chalmers University of Technology, Sweden, present the first hydrogen sensors ever to meet the future performance targets for use in hydrogen powered vehicles.</b></p><div><p class="chalmersElement-P">​<span style="background-color:initial">The researchers’ ground-breaking results were recently <a href="https://www.nature.com/articles/s41563-019-0325-4">published in the prestigious scientific journal Nature Materials.​</a> The discovery is an optical nanosensor encapsulated in a plastic material. The sensor works based on an optical phenomenon – a plasmon – which occurs when metal nanoparticles are illuminated and capture visible light. The sensor simply changes colour when the amount of hydrogen in the environment changes.</span></p> <p class="chalmersElement-P">The plastic around the tiny sensor is not just for protection, but functions as a key component. It increases the sensor’s response time by accelerating the uptake of the hydrogen gas molecules into the metal particles where they can be detected. At the same time, the plastic acts as an effective barrier to the environment, preventing any other molecules from entering and deactivating the sensor. The sensor can therefore work both highly efficiently and undisturbed, enabling it to meet the rigorous demands of the automotive industry – to be capable of detecting 0.1 percent hydrogen in the air in less than a second.</p> <img src="/SiteCollectionImages/Institutioner/F/350x305/Ferry_portratt_350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;height:216px;width:250px" /><p class="chalmersElement-P">“We have not only developed the world's fastest hydrogen sensor, but also a sensor that is stable over time and does not deactivate. Unlike today's hydrogen sensors, our solution does not need to be recalibrated as often, as it is protected by the plastic,” says Ferry Nugroho, a researcher at the Department of Physics at Chalmers.</p> <p class="chalmersElement-P">It was during his time as a PhD student that Ferry Nugroho and his supervisor Christoph Langhammer realised that they were on to something big. After reading a scientific article stating that no one had yet succeeded in achieving the strict response time requirements imposed on hydrogen sensors for future hydrogen cars, they tested their own sensor. They realised that they were only one second from the target – without even trying to optimise it. The plastic, originally intended primarily as a barrier, did the job better than they could have imagined, by also making the sensor faster. The discovery led to an intense period of experimental and theoretical work.</p> <p class="chalmersElement-P">“In that situation, there was no stopping us. We wanted to find the ultimate combination of nanoparticles and plastic, understand how they worked together and what made it so fast. Our hard work yielded results. Within just a few months, we achieved the required response time as well as the basic theoretical understanding of what facilitates it,” says Ferry Nugroho.</p> <p class="chalmersElement-P">Detecting hydrogen is challenging in many ways. The gas is invisible and odourless, but volatile and extremely flammable. It requires only four percent hydrogen in the air to produce oxyhydrogen gas, sometimes known as knallgas, which ignites at the smallest spark. In order for hydrogen cars and the associated infrastructure of the future to be sufficiently safe, it must therefore be possible to detect extremely small amounts of hydrogen in the air. The sensors need to be quick enough that leaks can be rapidly detected before a fire occurs.</p> <img src="/SiteCollectionImages/Institutioner/F/350x305/ChristophLanghammerfarg350x305.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;height:216px;width:250px" /><p class="chalmersElement-P">​“It feels great to be presenting a sensor that can hopefully be a part of a major breakthrough for hydrogen-powered vehicles. The interest we see in the fuel cell industry is inspiring,” says Christoph Langhammer, Professor at Chalmers Department of Physics.</p> <p class="chalmersElement-P">Although the aim is primarily to use hydrogen as an energy carrier, the sensor also presents other possibilities. Highly efficient hydrogen sensors are needed in the electricity network industry, the chemical and nuclear power industry, and can also help improve medical diagnostics.</p> <p class="chalmersElement-P">“The amount of hydrogen gas in our breath can provide answers to, for example, inflammations and food intolerances. We hope that our results can be used on a broad front. This is so much more than a scientific publication,” says Christoph Langhammer.</p> <p class="chalmersElement-P">In the long run, the hope is that the sensor can be manufactured in series in an efficient manner, for example using 3D printer technology.<br /><br /></p> <div><strong>Text: </strong><span style="background-color:initial">Mia Halleröd Palmgren,</span><span style="background-color:initial"> </span><a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se</a> and <span style="background-color:initial">Joshua Worth,</span><a href="mailto:joshua.worth@chalmers.se"> joshua.worth@chalmers.se</a><span style="background-color:initial">​ </span></div> <div><strong>Image</strong> of C<span style="background-color:initial">hristoph</span><span style="background-color:initial"></span><span style="background-color:initial"></span><span style="background-color:initial"></span><span style="background-color:initial"></span><span style="background-color:initial"></span><span style="background-color:initial"></span><span style="background-color:initial"></span><span style="background-color:initial"></span><span style="background-color:initial"> Langhammer: Henrik Sandsjö</span><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial"><strong>Illustration</strong> of the sensor technique: </span><span style="background-color:initial">Ella Marushchenko<br /></span><span style="background-color:initial">Images of Ferry Nugroho, the sensor and the group picture: Mia Halleröd Palmgren​</span></div></div> <div><img src="/SiteCollectionImages/Institutioner/F/750x340/Vatgassensor_750x340.jpg" alt="" style="color:rgb(33, 33, 33);font-family:&quot;open sans&quot;, sans-serif;font-size:24px;background-color:initial;margin:5px" /> ​</div> <h4 class="chalmersElement-H4"><span>Facts: The world's fastest hydrogen sensor​</span><span>​</span></h4> <div><span style="color:rgb(33, 33, 33);font-family:&quot;open sans&quot;, sans-serif;background-color:initial"><br /></span></div> <div><ul><li><img src="/SiteCollectionImages/Institutioner/F/Blandade%20dimensioner%20inne%20i%20artikel/vätgassensor_amerikansk_illu350x460.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px;width:250px;height:324px" /><span style="background-color:initial">The Chalmers-developed sensor is based on an optical phenomenon – a plasmon – which occurs when metal nanoparticles are illuminated and capture light of a certain wavelength.</span></li> <li><span style="background-color:initial"></span>The optical nanosensor contains millions of metal nanoparticles of a palladium-gold alloy, a material which is known for its sponge-like ability to absorb large amounts of hydrogen. The plasmon phenomenon then causes the sensor to change colour when the amount of hydrogen in the environment changes.</li> <li>The plastic around the sensor is not only a protection, but also increases the sensor’s response time by facilitating hydrogen molecules to penetrate the metal particles more quickly and thus be detected more rapidly. At the same time, the plastic acts as an effective barrier to the environment because no other molecules than hydrogen can reach the nanoparticles, which prevents deactivation.</li> <li>The efficiency of the sensor means that it can meet the strict performance targets set by the automotive industry for application in hydrogen vehicles of the future by being capable of detecting 0.1 percent hydrogen in the air in less than one second.</li> <li>The research was funded by the Swedish Foundation for Strategic Research, within the framework of the Plastic Plasmonics project.​<br /><br /></li></ul> <div><div></div></div></div> <div> </div> <h4 class="chalmersElement-H4">About the scientific article: </h4> <div> </div> <div><span style="background-color:initial">The article</span><span style="background-color:initial"> </span><a href="https://www.nature.com/articles/s41563-019-0325-4">”Metal – Polymer Hybrid Nanomaterials for Plasmonic Ultrafast Detection” ​</a><span style="background-color:initial">has been published in Nature Materials and is written by Chalmers researchers Ferry Nugroho, Iwan Darmadi, Lucy Cusinato, Anders Hellman, Vladimir P. Zhdanov and Christoph Langhammer. The results have been developed in collaboration with Delft Technical University in the Netherlands, the Technical University of Denmark and the University of Warsaw, Poland.</span><span style="background-color:initial">​</span></div> <div> </div> <div><br /></div> <div> </div> <div><img src="/SiteCollectionImages/Institutioner/F/750x340/Vatgassensor_forskarnabakom_20190404_750x340.jpg" alt="" style="margin:5px" /><br /> <span style="background-color:initial">Chalmers researchers</span><span style="background-color:initial"> ​</span><span style="background-color:initial">F</span><span style="background-color:initial">erry Nugroho, Iwan Darmadi, Christoph Langhammer, Lucy Cusinato och Anders Hellman. </span></div> <span></span><div></div> <div> </div> <div><br /></div> <div> </div> <div><h4 class="chalmersElement-H4" style="font-family:&quot;open sans&quot;, sans-serif">For more information:​</h4> <div><a href="/en/Staff/Pages/Ferry-Anggoro-Ardy-Nugroho.aspx">Ferry Nugroho</a>, <span></span>Researcher, Department of Physics, Chalmers University of Technology, +46 31 772 54 21, <a href="mailto:ferryn@chalmers.se">ferryn@chalmers.se</a><br /><br /></div> <div><a href="/en/staff/Pages/Christoph-Langhammer.aspx">Christoph Langhammer</a>, Professor, Department of Physics, Chalmers University of Technology, +46 31 772 33 31, ​ <a href="mailto:clangham@chalmers.se">clangham@chalmers.se</a></div></div>Thu, 11 Apr 2019 07:00:00 +0200https://www.chalmers.se/en/departments/see/news/Pages/the-first-image-of-a-black-hole.aspxhttps://www.chalmers.se/en/departments/see/news/Pages/the-first-image-of-a-black-hole.aspxThe first image of a black hole<p><b>Astronomers at Chalmers have been part of an international collaboration presenting the first observations of the black hole at the heart of distant galaxy Messier 87.</b></p>​<span style="background-color:initial">The Event Horizon Telescope (EHT) — a planet-scale array of eight ground-based radio telescopes forged through international collaboration — was designed to capture images of a black hole. On April 10, in coordinated press conferences across the globe, EHT researchers reveal that they have succeeded, unveiling the first direct visual evidence of a supermassive black hole and its shadow.</span><div><br /></div> <div>This breakthrough was announced in a series of six papers published in a special issue of The Astrophysical Journal Letters. The image reveals the black hole at the center of Messier 87, a massive galaxy in the nearby Virgo galaxy cluster. This black hole resides 55 million light-years from Earth and has a mass 6.5 billion times that of the Sun.</div> <div><br /></div> <div>The EHT links telescopes around the globe to form an Earth-sized virtual telescope with unprecedented sensitivity and resolution. The EHT is the result of years of international collaboration, and offers scientists a new way to study the most extreme objects in the Universe predicted by Einstein’s general relativity during the centennial year of the historic experiment that first confirmed the theory.</div> <div><br /></div> <div>&quot;We have taken the first picture of a black hole,&quot; says EHT project director Sheperd S. Doeleman of the Center for Astrophysics | Harvard &amp; Smithsonian. &quot;This is an extraordinary scientific feat accomplished by a team of more than 200 researchers.&quot;</div> <div><br /></div> <div><img src="/SiteCollectionImages/Centrum/Onsala%20rymdobservatorium/340x/eht_chalmers_foton_72dpi_340x157.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />Of these researchers, three are from Chalmers: John Conway and Michael Lindqvist at Onsala Space Observatory and the Department of Space, Earth and Environment, as well as Ivan Martí-Vidal, formerly of Onsala Space Observatory and now astronomer at the Instituto Geográfico Nacional in Spain.<br /></div> <div><br /></div> <div><div><span style="background-color:initial">– These results are incredibly exciting. But they are just the beginning of what I think will be a fantastic adventure when it comes to depicting black holes, </span><span style="background-color:initial">says</span><span style="background-color:initial"> </span><span style="background-color:initial">John Conway, professor of radio astronomy at Chalmers and director of Onsala Space Observatory.</span></div> <div><br /></div> <div>At Chalmers, the Group for Advanced Receiver Development at <span style="background-color:initial">Onsala Space Observatory,</span><span style="background-color:initial"> </span><span style="background-color:initial">GARD</span><span style="background-color:initial">, are developing receivers and frequency mixers for expanding EHT's possibilities to look even further into the universe. </span></div> <span></span><div></div></div> <div><br /></div> <div>More information and more images can be found in the <a href="https://www.eso.org/public/news/eso1907/?lang">press release from ESO, the European Southern Observatory</a>. </div>Thu, 11 Apr 2019 00:00:00 +0200https://www.chalmers.se/en/news/Pages/Hakan-Frisinger-scholarship-goes-to-Chalmers-professor.aspxhttps://www.chalmers.se/en/news/Pages/Hakan-Frisinger-scholarship-goes-to-Chalmers-professor.aspxHåkan Frisinger scholarship to Chalmers professor<p><b>​Håkan Frisinger Foundation for Means of Transport Research awards its 2018 scholarship to Chalmers Professor Sonia Yeh. The scholarship, amounting to 250 000 SEK, rewards Sonia Yeh for her innovative research concerning sustainable transport and developing solutions for mobility.</b></p>​<span style="background-color:initial">Sonia Yeh is a professor at Physical Resource Theory at the Department of Space, Earth and Environment at Chalmers University of Technology. Her fields of research centres on alternative transportation fuels, consumer behaviour, urban mobility and sustainability standards. Her research has made her an internationally recognized expert on energy economics and modulation of energy systems.</span><div><br /></div> <div>Among other things she co-led a large collaborative team from the University of California Davis and UC Berkeley advising the U.S. states of California and Oregon, and British Columbia, Canada to design and implement a market-based carbon policy targeting GHG emission reductions from the transport sector.</div> <div><br /></div> <div>Sonia Yeh came to Chalmers as Adlerbertska visiting professor and U.S Fulbright Distinguished Chair Professor in Alternative Energy Technology to foster the exchange of transport research among the U.S, Sweden and the rest of Europe.</div> <div><br /></div> <div>Appointed permanently at Chalmers since 2017, she now aims to promote sustainable transport by linking innovative Big Data techniques with emerging developments in human mobility. With the focus on designing solutions that minimize the system-wide, drawbacks of transportation, such as pollution, while enhancing the societal benefits, or convenience and access to mobility.</div> <div><br /></div> <div>Håkan Frisinger was CEO of Volvo in 1983–1987, and Chairman of the Board in 1997-1999. The nomination of recipients of the Frisinger scholarship is conducted by the Chalmers University of Technology and Volvo Research and Educational Foundations (VREF). The decision about the scholarship is taken by the Board of the VREF.<br /></div> <div><br /></div> <div>The scholarship will be presented by the Håkan Frisinger Foundation at a seminar on Monday May 6 from 13.00, at Chalmerska Huset, Gothenburg. The seminar will be held in English.</div> <div><br /></div> <div><div><a href="/en/about-chalmers/calendar/Pages/Håkan-Frisinger-Seminar.aspx">Click here for more information and to register for the seminar​</a></div></div> <div><br /></div> <div>Text: AB Volvo<br />Photo: Anna-Lena Lundqvist</div> <div></div>Wed, 10 Apr 2019 15:35:00 +0200https://www.chalmers.se/en/departments/see/news/Pages/Jubilee-conference-looking-into-space-and-to-the-future.aspxhttps://www.chalmers.se/en/departments/see/news/Pages/Jubilee-conference-looking-into-space-and-to-the-future.aspxJubilee conference looking into space and the future<p><b>​On April 15 international researchers working on instrumentation and technologies for astronomy, planetary and remote sensing gather at Chalmers for ISSTT 2019, the 30th International Symposium on Space Terahertz Technology. – This is a relatively small and highly specialized research field, contributing absolute top-class instruments and research to many other fields, says Victor Belitsky, head of ISSTT’s local organizing committee at Chalmers.</b></p>​This also marks the second time the ISSTT is arranged at Chalmers, who was first to arrange the symposium outside of the US, in 2005. The symposium topics range from instrumentation for miniature “shoe box” satellites and how to probe the trail of water in distant space in search of habitable planets, to the development strategies for the <a href="https://www.almaobservatory.org/en/home/">ALMA Observatory in Chile</a>.<div><div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/RoG/Profilbilder/belitsky-victor.JPG" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />– What is perhaps “exotic” for our field is that it covers many areas. It’s rooted in basic physics, we have first-rate engineering of micro components down to Nano levels, as well as practical installations in full scale telescopes – and there are many connections and active feedback from users and researchers. This is also reflected in the wide variety of topics during the conference, says Victor Belitsky. </div> <div><br /></div> <div>Victor is professor and head of the Group for Advanced Receiver Development (GARD) at Chalmers. GARD is part of the division Onsala Space Observatory at the Department of Space, Earth and Environment and the group is responsible for designing and delivering instruments and receiver systems to some of the world’s largest astronomy observatories such as ALMA, <a href="http://www.apex-telescope.org/">APEX</a> and <a href="https://www.cosmos.esa.int/web/herschel">Herschel</a>.</div> <div><br /></div> <div><div>Victor describes the atmosphere at ISSTT to be both informal and productive, mainly since many of over the 130 coming researchers are returning ISSTT participants, willing to share ideas and discoveries. But there are also new researchers coming every year. To encourage young participants the symposium arranges a student competition for the first time this year, to “identify and recognize outstanding technical contributions from individual students”. Five students from the master program in Wireless, Photonics and Space Engineering are also participating in the symposium. </div> <div><br /></div> <div>The five keynote speakers are: </div> <div><div><ul><li><span style="background-color:initial">Susanne Aalto, </span><span style="background-color:initial">Extragalactic Astronomy, Space, Earth and Environment, Chalmers. </span></li> <li><span style="background-color:initial">Donal Murtagh, Microwave and optical remote sensing, </span><span style="background-color:initial">S</span><span style="background-color:initial">pace, Earth and Environment, </span><span style="background-color:initial">Chalmers. ​</span></li> <li><span style="background-color:initial">Leonardo Testi, </span>Professor, Head of the ESO ALMA Support Centre</li> <li><span style="background-color:initial">Paola Caselli, </span>the Max-Planck-Institute, and Space, Earth and Environment , Chalmers</li> <li><span style="background-color:initial">Karl-Friedrich Schuster, </span>Institut de Radioastronomie Millimétrique</li></ul></div> <div><span style="background-color:initial">When considering the symposium programme, Victor is most looking forward to the last day of the conference, which focuses on new devices and future developments. But he also knows to expect the unexpected during the ISSTT. </span><br /></div></div> <div><br /></div> <div>– The abstracts from our invited speakers look very promising, but I also know that we are in for some surprises, as some of the speakers will present their very latest work, and even works in progress for others to comment. So, I am most looking forward to the surprises! </div></div> <div><br /></div> <div><em>Text: Christian Löwhagen.</em></div> <div><br /></div> <h5 class="chalmersElement-H5">Read more: ​​</h5> <div><a href="https://www.isstt2019.com/">ISSTT 2019 official web site​</a>. </div> <div><a href="/en/departments/see/research/OSO/gard/Pages/default.aspx">GARD, the Group for Advanced Receiver Development at Chalmers</a>. </div> <div><a href="/en/departments/see/news/Pages/Will-image-the-distant-universe.aspx">News item about the ALMA receivers, developed and produced by GARD</a>.</div> <div><p class="MsoNormal"><br /></p></div></div>Tue, 09 Apr 2019 00:00:00 +0200https://www.chalmers.se/en/news/Pages/Chalmers-education-the-best-in-Europe-.aspxhttps://www.chalmers.se/en/news/Pages/Chalmers-education-the-best-in-Europe-.aspxStudents experience Chalmers education as the best in Europe<p><b>​International students rate the Chalmers educational experience as the best in Europe, according to results from the International Student Barometer. The quality of teaching and assessment receives particular praise. Additionally, when asked if the University was overall ‘a good place to be’, students’ responses put Chalmers at number one in the world.</b></p><div>​The International Student Barometer is an annual study mapping out international students' experiences of their university, in categories such as learning, living, and the support network. This year's results are based on responses from almost 200,000 international students, at 212 universities worldwide.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>In the category for the overall learning experience, Chalmers was the number one rated university in Europe, and number four in the world. International students at Chalmers report that their teachers are experts in their field, have excellent English skills, and have a good ability to convey their knowledge. The teaching support, including assessment, feedback, and course organisation is also very highly regarded. </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>“We have had high ratings in the Learning categories for several years, so I am not surprised. But the fact that we have risen in all sub-areas of the category confirms to me what I witness every day – all of our teachers, heads of programme, heads of department, operations support, student representatives and more, are dedicated and focused on always getting better. It is a culture of constant improvement, that I am very proud to represent,” says Maria Knutson Wedel, Vice-President for Education and Lifelong Learning at Chalmers.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>The formal welcome programme for new students, and the social activities on offer also receive good rankings in the study. The Chalmers International Mobility group, which works with supporting and welcoming international exchange students, received very high ratings as well – in this case, rated as number one in the world. </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>“This is evidence that all the work we have put in here has really paid off. Our hope is that this will contribute to Chalmers' reputation globally as a great study destination,” says Ann-Marie Danielsson-Alatalo, co-ordinator for Chalmers International Mobility group. </div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">Gothenburg one of the world’s best study destinations</h3> <div> </div> <div> </div> <div> </div> <div>In terms of the overall living experience, Chalmers itself is rated at number one in the world in the category “good place to be”. This reflects well on the general standard of life for students in the city, and Gothenburg receives very high marks for its social life as well as public transport. </div> <div> </div> <div> </div> <div> </div> <div>The University of Gothenburg also took part in this year’s ISB, and their students reported a similar satisfaction with the wider city experience.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>“The survey showed us that our international students are happy with their daily life in the city. They rate Gothenburg highly as a good place to be, and they appreciate the eco-friendly attitude, the feeling of personal safety and being able to get around easily with public transportation,” says Klara Ljungberg, International Relations Officer at the University of Gothenburg.</div> <div><br /></div> Yuning Li, who moved here from China to study Electric Power Engineering at Chalmers, can witness: <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>“Student life at Chalmers has a great work-life balance. It is a perfect example of 'lagom'! Additionally, the strong connections between Chalmers and industry in Gothenburg really help me to consider my ideal career path and to be prepared for the future”, says Yuning Li.</div> <div> </div> <div> </div> <div> </div> <h3 class="chalmersElement-H3">Focus on students’ accommodation</h3> <div> </div> <h3 class="chalmersElement-H3"> </h3> <div> </div> <div>There are some areas, however, where problems remain. Finding suitable accommodation is still an issue, as well as certain practical issues such as opening a bank account and the high cost of living. </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>“We put a lot of energy into informing prospective students how best they can find accommodation, and how important it is to start the process early. We are also continuing our work together with other partners to build further student housing, and to try and improve the banking system,” says Maria Knutson Wedel. <br /> </div> <div> </div> <div> </div> <div> </div> <div>Chalmers is committed to improving this accommodation situation for students, and this year alone, over 200 brand-new, purpose-built student residences are on schedule to be completed within a few minutes’ walk of Campus Johanneberg. </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>The new Gibraltar accommodation that is currently being built near Campus Johanneberg will offer 100 new student residences for international master students and guest researchers with planned occupancy in August. Just nearby, the Uddjaur quarter is also being completed with 118 new student housing units.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div>Furthermore, several other construction projects are now underway in Gothenburg to increase the amount of student housing in the city. The collaboration group Gbg 7000+, of which Chalmers is a part, has ambitions to build at least 7 000 new student apartments in Gothenburg by the year 2026.</div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div> </div> <div><strong>Text:</strong> Vedrana Sivac and Joshua Worth</div> <div> </div> <div> </div> <div> </div> <div> </div> <div><br /></div> <div> </div> <div> </div> <div> </div> <h2 class="chalmersElement-H2">About the survey</h2> <h2 class="chalmersElement-H2"> </h2> <h2 class="chalmersElement-H2"> </h2> <h2 class="chalmersElement-H2"> </h2> <ul><li>The International Student Barometer is conducted annually by the organisation I-graduate. This edition was carried out from September to December 2018 and included 212 Universities participating worldwide. Chalmers distributed the questionnaire to 1 472 international students and the response rate was 23%. </li> <li>The respondents were mainly students at Master’s level, as well as exchange students. India, Germany, China, Spain and France were the most common nationalities among the respondents.</li></ul> <div> </div> <div> </div> <div> </div> <div> </div>Wed, 03 Apr 2019 09:00:00 +0200https://www.chalmers.se/en/news/Pages/Tracks-prepares-students-for-the-future.aspxhttps://www.chalmers.se/en/news/Pages/Tracks-prepares-students-for-the-future.aspxTracks prepares students for the future<p><b>Chalmers’ new educational initiative, Tracks, offers interdisciplinary and individualised studies, starting this autumn. It will make students better prepared to solve future societal challenges, such as energy supply, transport and more efficient use of resources.</b></p><div>The name Tracks refers to just that – the students choosing their own track, and the tracks that will be created between the existing programmes.</div> <div>“It is about keeping our students’ high employability also in the future,” says Kristina Henricson Briggs, Vice Director for Tracks.</div> <div><br /></div> <div><strong>Flexible and individualised education</strong></div> <div>Tracks is a ten-year investment from the Chalmers Foundation – one of the largest investments in the field of education in the University's 190-year history.</div> <div>A large part of the studies will be interdisciplinary, meaning that they will cross educational and subject boundaries. This offers the students great opportunities to broaden their knowledge outside of their chosen main area. Their studies take place mainly in project form, and the study plan can be adjusted and developed based on new circumstances.</div> <div>“We are creating an arena in which we train our students to address major global challenges,” says Mikael Enelund, Director of Tracks.</div> <div><br /></div> <div>And there is no shortage of global challenges that need addressing, in areas such as sustainability, transport and infrastructure, energy, global systems and vehicle safety.</div> <div>“These are all areas where Chalmers has cutting edge research,” says Mikael Enelund.</div> <div><br /></div> <div>The preparations are in full swing, and during the academic year of 2019/2020 the first themes and projects within Tracks will start. More themes and projects will gradually be added.</div> <div><br /></div> <div>The Tracks model consists of challenge-driven courses and projects, where students from different disciplines work together to understand and/or solve complex societal challenges, to develop, build, test and implement new processes, products and systems, in order to gain and develop interdisciplinary competences.</div> <div>This structure of education will give the students the opportunity for a more individualised study path, through which every student will be able to tailor their own educational profile.  Based on their interests, they can choose one or several Tracks courses, reflecting on which prerequisite competences they require, and attaining them through a supportive infrastructure.</div> <div>The intention is also that programmes and courses will be more flexible to be able to develop faster and include new technology and pedagogy. In the quality assurance process, only overall general learning outcomes will be specified for Tracks courses while specific content and outcomes are defined in connection with the course start.</div> <div><br /></div> <div><strong>Investment in learning environments</strong></div> <div>Tracks also includes a large investment in Chalmers' learning environments. To meet the needs of the Tracks courses, Chalmers will create outstanding modern learning environments with, for example, computer resources for machine learning and artificial intelligence, as well as labs where students can build and test prototypes, and open, creative areas for group work.</div> <div>&quot;Since Tracks is modernising both the education and the premises, it is an exciting and important development. It will be of benefit to both our current and future students and is something that Chalmers is very proud to offer,&quot; says Kristina Henricson Briggs.</div> <div><br /></div> <div></div> <div><br /></div> <div><strong>Text:</strong> Erik Krång</div> <div><strong>Picture:</strong> Johan Bodell</div> <div><br /></div> Mon, 01 Apr 2019 16:00:00 +0200https://www.chalmers.se/en/departments/math/news/Pages/The-Wallenberg-investment-in-mathematics-continues.aspxhttps://www.chalmers.se/en/departments/math/news/Pages/The-Wallenberg-investment-in-mathematics-continues.aspxThe Wallenberg investment in mathematics continues<p><b>​This year’s funding from the Wallenberg mathematics programme goes to 15 mathematicians, amongst them Julia Brandes who receives a grant to recruit a postdoctoral researcher, Stephen Pankavich who will be visiting professor at Mathematical Sciences, and Jakob Hultgren who will receive a postdoctoral position abroad.</b></p><p>​The Knut and Alice Wallenberg Foundation has since 2014, together with the Royal Swedish Academy of Sciences, supported the mathematical research in Sweden through an extensive mathematics programme. The aim is for Sweden to recover its position at the international cutting edge by giving the best young researchers international experience and by recruiting young as well as more experienced mathematicians to Sweden.</p> <p><a href="https://kaw.wallenberg.org/en/press/continuing-major-investments-mathematics">Press release from the Knut and Alice Wallenberg Foundation &gt;&gt;</a></p> <h4><a href="https://kaw.wallenberg.org/en/julia-brandes">New solutions to ancient problems </a></h4> <p><img class="chalmersPosition-FloatRight" alt="Photo Julia Brandes" src="/SiteCollectionImages/Institutioner/MV/Nyheter/JuliaBrandes200x250.jpg" style="margin:5px" />Julia Brandes plans in her project to make use of the improved precision of the circle method to study the number of integer solutions to certain equation systems under certain extra conditions. Two cases are particularly interesting. On the one hand, she studies such equation systems where the variables lie in widely differing ranges – some variables are large while others are small. The other part of the project is about solutions which, if they are written in a number system with a certain prime base p, avoid certain digits. Such numbers are of interest because they have a strange but regular fractal structure. By making use of this special structure it is expected that it will be possible to predict how many such solutions there are.</p> <p>– I think that research in mathematics should be supported for two reasons. On the one hand, there is a certain romance in fundamental mathematical research, as in fundamental research in terms of space travel or particle accelerators. That romance is not to be underestimated as the source of inspiration for future researchers. How many young people interested in mathematics do not read popular science books on, for example, Ramanujan or Fermat’s last theorem? The second reason is less romantic: A large part of the science and engineering research had not been imagined without mathematics.</p> <p><a href="https://science.gu.se/aktuellt/nyheter/Nyheter+Detalj//satsar-pa-matematiker.cid1622485">The whole interview with Julia Brandes at the Faculty of Science web site, in Swedish &gt;&gt;</a></p> <h4><a href="https://kaw.wallenberg.org/en/stephen-pankavich">Cosmic plasma in a mathematical suit </a></h4> <p><img class="chalmersPosition-FloatRight" alt="Photo Stephen Pankavich" src="/SiteCollectionImages/Institutioner/MV/Nyheter/StephanPankavich200x250.jpg" style="margin:5px" />Stephen Pankavich is an associate professor at the Colorado School of Mines, Golden, USA. He will be a visiting professor at the Department of Mathematical Sciences and together with researchers here develop new methods for solving different mathematical problems in the kinetic theory of plasma dynamics. Plasma is a special kind of gas in which electrons are stripped from the atoms, making the gas electrically charged. Plasma is therefore of practical interest; for example, plasma engines have been developed to drive probes that are sent far out in space. Plasma is regarded as the fourth form of matter, after gases, liquids and solids, and is the most common state of matter in the universe. Galactic clouds, tails of comets and the solar wind, among many other things, consist of plasma’s electrically charged particles.</p> <p>The motions of plasma are described by a number of complicated partial differential equations. The purpose of this project is to show that the equations have realistic solutions, and to determine the properties of these solutions, such as development over time, and calculate their sensitivity with respect to the plasma’s state, such as its mass, charge, or temperature. Since the mathematical models always have physical counterparts, the challenge of analyzing a problem mathematically also becomes a challenge in understanding the physical phenomena it describes at a deeper level. Therefore, a discovery of a specific behavior in solutions to partial differential equations can be translated into real knowledge of problems in plasma physics or astrophysics.</p> <h4><a href="https://kaw.wallenberg.org/en/jakob-hultgren">New tools for capturing the unruly </a></h4> <p><img class="chalmersPosition-FloatRight" alt="Photo Jakob Hultgren" src="/SiteCollectionImages/Institutioner/MV/Nyheter/JakobHultqvistKAW200x250.jpg" style="margin:5px" />Jakob Hultgren receives a postdoctoral position at a foreign university and funding for two years after his return to Sweden. The project’s title is “New notions of canonical metrics and stability in complex geometry” and contains two separate parts. The first is based on the new types of canonical metrics and stability conditions that Jakob introduced together with David Witt Nyström when he was a doctoral student (<a href="/sv/institutioner/math/nyheter/Sidor/Pa-jakt-efter-det-unika.aspx">interview before the thesis defence at Chalmers University of Technology last year</a>, in Swedish). There are many different things that needs investigation, but the overall goal is to establish new connections between geometric analysis and other fields such as algebraic geometry and probability theory. The second part of the project is about a question related to mirror symmetry in string theory that was posed in the early 2000s (the Gross-Wilson conjecture). This is a very algebraic problem and the new part of the approach is an analytical tool that Jakob developed together with Magnus Önnheim at Chalmers. </p> <p>– At the University of Maryland, I will mainly work with Yanir Rubinstein. He has made many important contributions to the field but is also very broad and flexible in his interests, so there will probably appear many unexpected and interesting angles during the time of the project. Many of our ideas and tools come from geometric analysis where <a href="http://www.abelprize.no/c73996/seksjon/vis.html?tid=74011&amp;strukt_tid=73996">Karen Uhlenbeck, who received the Abel Prize last week</a>, is active.<br />For example, one of the inspirations for the first part of the project is one of her results: the Donaldon-Uhlenbeck-Yau theorem.<br /><br /><strong>Texts</strong>: Carina Eliasson, Simone Calogero, Jakob Hultgren<br /><strong>Photos</strong>: Johan Bodell (Julia Brandes), private (Stephen Pankavich, Jakob Hultgren)</p>Thu, 28 Mar 2019 03:30:00 +0100https://www.chalmers.se/en/departments/see/news/Pages/EU-consumption-plays-major-role-in-tropical-deforestation.aspxhttps://www.chalmers.se/en/departments/see/news/Pages/EU-consumption-plays-major-role-in-tropical-deforestation.aspxEU consumption linked to tropical deforestation<p><b>A sixth of all emissions resulting from the typical diet of an EU citizen can be directly linked to deforestation of tropical forests. Two new studies, from Chalmers University of Technology, Sweden, shed new light on this impact, by combining satellite imagery of the rainforest, global land use statistics and data of international trade patterns.  “In effect, you could say that the EU imports large amounts of deforestation every year. If the EU really wants to achieve its climate goals, it must set harder environmental demands on those who export food to the EU,” says Martin Persson from Chalmers, one of the researchers behind the studies.</b></p><div><img src="/SiteCollectionImages/Institutioner/SEE/Nyheter/Martin-Florence.jpg" class="chalmersPosition-FloatRight" alt="" style="margin:5px" />​<span style="background-color:initial">The link between production of certain foods and deforestation has been known before. But what Martin Persson and Chalmers colleague Florence Pendrill have now investigated is the extent to which deforestation in the tropics is linked to food production, and then where those foods are eventually consumed. In the first study (</span><a href="https://iopscience.iop.org/article/10.1088/1748-9326/ab0d41" style="outline:currentcolor none 0px">Deforestation displaced: trade in forest-risk commodities and the prospects for a global forest transition</a>)<span style="background-color:initial">, they focused on how the expansion of cropland, pastures, and forestry plantations has taken place at the expense of the rainforest.</span></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial">“We can see that more than half of deforestation is due to production of food and animal feed, such as beef, soy beans and palm oil. There is big variation between different countries and goods, but overall, exports account for about a fourth of that deforestation which is connected to food production. And these figures have also increased during the period we looked at,” says Florence Pendrill.</span></div> <div> </div> <div><br /></div> <div>Using this information, the researchers investigated, in the second study (<span style="background-color:initial">(</span><a href="https://www.sciencedirect.com/science/article/pii/S0959378018314365" style="outline:currentcolor none 0px">Agricultural and forestry trade drives large share of tropical deforestation emissions</a>)<span style="background-color:initial">,</span><span style="background-color:initial"> the amount of carbon dioxide </span><span style="background-color:initial">emissions resulting from this production (see the picture below), and where the produce is then consumed. The figures for the EU are particularly interesting, since the EU is a large food importer. Furthermore, the EU shall soon present a plan for how to reduce its contribution to deforestation.</span></div> <span></span><div></div> <div> </div> <div><br /></div> <div>The EU already has strict requirements in place connected to deforestation which producers of timber and wood products must adhere to in order to export their goods to the EU. This demonstrates their ability to influence other countries’ work in protecting the rainforest.</div> <div><br /></div> <div> </div> <div>“Now, as the connection between food production and deforestation is made clearer, we should start to discuss possibilities for the EU to adopt similar regulations for food imports. Quite simply, deforestation should end up costing the producer more. If you give tropical countries support in their work to protect the rainforest, as well as giving farmers alternatives to deforestation to increase production, it can have a big impact,” says Florence Pendrill. </div> <div><br /></div> <div> </div> <div>The current studies were done in collaboration with researchers from the Stockholm Environment Institute in Sweden, Senckenberg Biodiversity and Climate Research Centre in Germany, and NTNU, the Norwegian University of Science and Technology. They are a continuation of research which was done through the Prince project (Policy Relevant Indicators for National Consumption and Environment), where the connections between Swedish consumption and emissions from deforestation were presented in the autumn. </div> <div><br /></div> <div> </div> <div>The studies indicate that, although there is a big variation between different EU countries, on average a sixth of the emissions from a typical EU diet can be directly traced back to deforestation in the tropics. Emissions from imports are also high when compared with domestic agricultural emissions. For several EU countries, import emissions connected to deforestation are equivalent to more than half of the emissions from their own, national agricultural production. </div> <div><br /></div> <div> </div> <div>“If the EU really wants to do something about its impact on the climate, this is an important emissions source. There are big possibilities here to influence production so that it avoids expanding into tropical forests,” says Martin Persson. </div> <div><br /></div> <div> </div> <div>Above all, Martin Persson believes the responsibility for achieving these changes lies with bigger actors, such as countries and large international organisations. But he also sees a role for the consumer to get involved and have an influence.</div> <div><br /></div> <div> </div> <div>“Public opinion is vital for the climate question – not least in influencing politicians, but also commercially. We can see already that several companies have made commitments to protecting tropical forests, through voluntarily pledging to avoid products which are farmed on deforested land. And in large part, that results from the fact that popular opinion is so strong on this issue,” he concludes. </div> <div><br /></div> <div><em>Text: Christian Löwhagen. </em></div> <div><em>Photos: Anna-Lena Lundqvist and Christian Löwhagen.</em></div> <em> </em><div><em> </em></div> <em> </em><div>​<br /></div> <div> </div> <div><h5 class="chalmersElement-H5"><span>More information on: Carbon dioxide emissions due to tropical deforestation</span></h5></div> <h5 class="chalmersElement-H5"> </h5> <div>For the period 2010–2014, the researchers estimate net emissions of 2.6 gigatonnes of carbon dioxide due to deforestation associated to the expansion of croplands, pastures and forestry plantations in the tropics. The main commodity groups associated with these emissions were cattle meat (0.9 gigatonnes of CO2) and oilseed products (including both palm oil and soybeans; 0.6 gigatonnes of CO2).</div> <div> </div> <div>There are large geographic variations in what commodities are associated with deforestation-related emissions. In Latin America, cattle meat is the dominant contributor (0.8 gigatonnes of CO2), mainly attributed to Brazilian production. In Indonesia almost half of the emissions (0.3 gigatonnes of CO2) come from oilseeds (mainly oil palm). In the rest of Asia-Pacific and Africa, a more diverse mix of commodities drives emissions from deforestation.</div> <div> </div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/SEE/Nyheter/Diagram-fordelning-utslapp.jpg" alt="" style="margin:5px" /><br /><br /><h5 class="chalmersElement-H5">Emissions sources for deforestation-related carbon dioxide emissions</h5> <div>Emissions sources for deforestation-related carbon dioxide emissions are diverse and vary by region. Emissions embodied in production are shown for each commodity group within each region. A region’s width on the x-axis corresponds to the embodied emissions produced in that region, while the y-axis shows the share of emission attributed to each commodity group within each region, implying that the rectangles within the plot are scaled according to the emissions embodied in each region-commodity combination. The percentages within the rectangles indicate the share of the total embodied emissions; 2.6 gigatonnes of carbon dioxide due to tropical deforestation during the period 2010–2014.</div></div> <div><em>Image: Florence Pendrill.</em></div> <em> </em><div>​<br /></div> <div> </div>Wed, 27 Mar 2019 06:00:00 +0100https://www.chalmers.se/en/departments/physics/news/Pages/Prestigious-Wallenberg-grant-to-Physics-Professor---.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/Prestigious-Wallenberg-grant-to-Physics-Professor---.aspxPhysics Professor chosen to be Wallenberg Scholars<p><b>​Chalmers Professor Fredrik Höök is one of 22 prominent researchers in Sweden to receive SEK 18 million from the Wallenberg Foundations in the form of a five-year grant for free research.​​​</b></p>​<span></span><span style="background-color:initial">“</span><img src="/SiteCollectionImages/Centrum/Fysikcentrum/News/Fredrik-Hook_400x550px.jpg" class="chalmersPosition-FloatRight" alt="" /><span style="background-color:initial">It is amazing to get this chance and I feel deeply honoured. Now, I will carefully consider how to make the best out of this opportunity and the responsibility that comes with this privilege, ”says Fredrik Höök, Professor at the Department of Physics at Chalmers.</span><div><br /></div> <div>Wallenberg Scholars is a program designed to support and encourage some of the most successful researchers at Swedish universities. The aim is for the researchers to be able to adopt a long-term approach to their work, with less time and effort expended on seeking external funding, and with higher ambitions, so that their research has an even greater international impact. The grants also enable researchers to commit to more challenging and longer-term projects. </div> <div><h5 class="chalmersElement-H5" style="font-family:&quot;open sans&quot;, sans-serif">Studying cell communication</h5></div> <div><span style="background-color:initial">Fredrik Höök is conducting research within biological physics and he is the academic leader of the industrial research centre Formulaex. The project focuses on encapsulating biological pharmaceuticals into nanoscale carriers in order to reach the body’s cells and treat severe diseases.</span><br /></div> <div><br /></div> <div>In his research, Fredrik Höök is studying how biological cells communicate with each other. Cell membranes play a key role in many biological processes and diseases. The membrane is essential for the cell’s ability to communicate with its surroundings. Sometimes particles of membrane can detach to form “communication capsules”, (microvesicles), which transport substances to other cells. Fredrik Höök and his colleagues intend to develop new methods for studying the microvesicles, and to try to make copies of them.  </div> <div><br /></div> <div>In recent years studies of cell membranes have yielded a wealth of new knowledge about various biological processes. Those studies have been made possible by increasingly sensitive measuring instruments. </div> <div><br /></div> <div>“Now, we want to develop new methods for microscoping and handling small quantities of liquid. One of their main aims is to analyze the microvesicles – exosomes – used by cells to communicate with each other,” says Fredrik Höök. </div> <div><br /></div> <div>To make maximum use of the sensitive measuring methods, the researchers have designed structures that behave in the same way as cell membranes. This enables them to biophysically study how cell membranes interact with nanoparticles of various kinds, such as viruses and exosomes.</div> <div><br /></div> <div>Fredrik Höök’s research group uses artificial cell membranes to carry out in-depth studies of individual nanoparticles that have been attached to the membrane. The researchers also intend to develop a bioanalytical tool capable of measuring the size, structure, and optical properties of individual particles. This will enable the research team to make detailed analyses of complex biological samples, and they also hope to be able to sort nanoparticles according to their properties.</div> <div><h5 class="chalmersElement-H5"><span>I</span><span>nspiring new ways of developing and administering medication</span></h5></div> <div>​<span style="background-color:initial">The aim is to better understand how the nanoparticles work, and what enables them to penetrate the cell. Höök wants to use that knowledge to design artificial exosomes.</span></div> <div><br /></div> <div>“Hopefully, this could lead to improved disease diagnostics and inspire new ways of developing and administering medication. Findings from the research may also answer fundamental questions about the properties of nanoparticles. This may be of benefit in the field of nanosafety, and in many other areas,” says Fredrik Höök. </div> <div><br /></div> <div>Text: Mia Halleröd Palmgren, <a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se </a></div> <div>Photo: Henrik Sandsjö</div> <div>Illustration: Yen Strandqvist</div> <div><br /></div> <div><img src="/SiteCollectionImages/Institutioner/F/750x340/Stressade%20jastceller_illustration_webb_banner.jpg" alt="Metod för att analysera jästcellers stressreaktioner" /><br /></div> <div><br /></div> <h4 class="chalmersElement-H4">Press releases and articles about <a href="/en/Staff/Pages/Fredrik-Höök.aspx">Fredrik Höök </a> and his research</h4> <div><a href="/en/departments/physics/news/Pages/Investigating-cell-stress-for-better-health-–-and-better-beer.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Investigating cell stress for better health – and better beer </a></div> <div><a href="/en/departments/physics/news/Pages/75-MSEK-for-developing-target-seeking-biological-pharmaceuticals.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />75 MSEK for developing target seeking biological pharmaceuticals </a></div> <div><a href="/en/departments/physics/news/Pages/A-Chalmers-innovation-paves-the-way-for-the-next-generation-of-pharmaceuticals.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Chalmers paves the way for the future of designed pharmaceuticals </a></div> <div><span></span><a href="/en/centres/gpc/news/Pages/Portrait-Fredrik-Hook.aspx"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/ichtm.gif" alt="" />Portrait: A matter of life and Science </a></div> <div><br /></div> <div><span></span><h4 class="chalmersElement-H4" style="font-family:&quot;open sans&quot;, sans-serif">Wallenberg Scholars and granted researchers at Chalmers</h4> <div>The Knut and Alice Wallenberg Foundation awards grants to Wallenberg Scholars in the fields of medicine, science and technology. Following this year’s grant awards, there are 63 active Wallenberg Scholars. The next cohort of Wallenberg Scholars will be chosen in 2021.</div> <div><br /></div> <div>There are already three active Wallenberg Scholars at Chalmers: </div> <div>Professor <span style="font-weight:700">Mikael Käll </span>at the Department of Physics,</div> <div>Professor <span style="font-weight:700">Jens Nielsen </span><span style="background-color:initial">at the Department of Biology and Biological Engineering  </span></div> <div><span style="background-color:initial"></span><span style="background-color:initial">Professor </span><span style="background-color:initial;font-weight:700">Pernilla Wittung-Stafshede </span><span style="background-color:initial">at the Department of Biology an</span><span style="background-color:initial">d Biological Engineering  </span></div> <div><span style="background-color:initial"><br /></span></div> <div><span style="background-color:initial"></span></div> <p class="chalmersElement-P">Earlier years, Professor <span style="font-weight:700">Per Delsing, </span><span style="background-color:initial">Professor <strong>Peter Andrekson </strong></span><span style="background-color:initial">and Professor </span><span style="background-color:initial;font-weight:700">Owe Orwar</span><span style="background-color:initial;font-weight:700"> </span><span style="background-color:initial">have been choosen to be Wallenberg Scholars. </span></p> <div><br /></div> <div><a href="https://kaw.wallenberg.org/en"><img class="ms-asset-icon ms-rtePosition-4" src="/_layouts/images/icgen.gif" alt="" />Read more at the webpage of the Knut and Alice Wallenberg Foundation.  </a></div></div> <div><span style="background-color:initial"></span></div>Mon, 25 Mar 2019 09:00:00 +0100https://www.chalmers.se/en/news/Pages/This-year's-Chalmers-Fence-measure-the-horse's-speed.aspxhttps://www.chalmers.se/en/news/Pages/This-year's-Chalmers-Fence-measure-the-horse's-speed.aspxThe Chalmers Fence measures the horse&#39;s speed<p><b>​Gothenburg Horse Show and Chalmers University of Technology collaborate for the fourth year in a row to increase knowledge about how horses cross a barrier. This year, the smart fence measures the horse&#39;s speed – something that has never been done before.</b></p>​<span style="background-color:initial">This year, the group of Chalmers students use state-of-the-art radar equipment, originally developed for self-driving vehicles which now comes in handy to measure the horse's speed towards, over and after the fence.</span><div>“It is a good example of how we re-use our research and are able apply it in many different areas”, says Magnus Karlsteen, responsible for Chalmers horse sports venture.</div> <div><br /></div> <div><strong>The riders come to the exhibition stand</strong></div> <div>Just like in previous years, the audience will be able to see the results on the jumbotron in the arena. But a novelty this year is that the riders are invited to the Chalmers exhibition stand, which this year is located right outside the arena. There they can go through their horse's unique results together with an expert from the fence team.</div> <div>“One great thing about having the exhibition stand in the Scandinavium lobby is that the riders get a golden opportunity to immerse in how their horse moves and thus how they can improve their training. And it also gives the audience a chance to meet their heroes”, says Magnus Karlsteen.</div> <div><br /></div> <div><strong>Combining studies with their hobby</strong></div> <div>The project Chalmers Fence is run by Chalmers students who use their knowledge to build world-unique measurement systems with a focus on the horse's well-being, health and comfort. Many of the students are intrigued by the possibility to combine their passion for horses with their studies.</div> <div>“That is an opportunity you get when you study at Chalmers, that you can combine your hobby with your studies”, says Magnus Karlsteen.</div> <div><br /></div> <div><strong>Gothenburg Horse Show self-signed partner</strong></div> <div>The information from this year's fence measurements is combined with the results from previous years. And the goal is that the analyzes of the horses’ movement patterns will result in a more sustainable training, competition and breeding environment in the horse industry.</div> <div>“The collaboration with Chalmers is part of Gothenburg Horse Show's work to support development! The equestrian sport has been given new scientific facts which supports our work on horse training and competition”, says Tomas Torgersen, race director for the Gothenburg Horse Show.</div> <div><br /></div> <div>Text: Helena Österling af Wåhlberg</div> <div>Photo/video: Johan Bodell and students for the fence group 2019</div> <div><br /></div> Thu, 21 Mar 2019 07:00:00 +0100https://www.chalmers.se/en/departments/physics/news/Pages/Heading-towards-a-tsunami-of-light.aspxhttps://www.chalmers.se/en/departments/physics/news/Pages/Heading-towards-a-tsunami-of-light.aspxHeading towards a tsunami of light<p><b>​​Researchers at Chalmers University of Technology and the University of Gothenburg, Sweden, have proposed a way to create a completely new source of radiation. Ultra-intense light pulses consist of the motion of a single wave and can be described as a tsunami of light. The strong wave can be used to study interactions between matter and light in a unique way. Their research is now published in the scientific journal Physical Review Letters. ​​​​​</b></p><img class="chalmersPosition-FloatRight" src="/SiteCollectionImages/Institutioner/F/Blandade%20dimensioner%20inne%20i%20artikel/IlliaThiele_190312_01_beskuren_webb.jpg" alt="" style="margin:5px;width:150px;height:224px" /><span style="background-color:initial"><div>“This source of radiation lets us look at reality through a new angle – it is like twisting a mirror and discovering something completely different,” says Illia Thiele, a theoretical physicist at Chalmers University of Technology. <br /></div> <div> </div> <div>Together with Dr Evangelos Siminos at the University of Gothenburg, and Tünde Fülöp, Professor of Physics at Chalmers, Illia Thiele now presents a theoretical method for creating the fastest possible single wave motion. This kind of radiation has never yet been observed in the universe or even the lab.<br /></div> <div> </div> <div>The radiation source is interesting for understanding the properties of different materials. Since it offers an ultra-fast switching of light matter interactions, it can be useful in material science, or sensor related research, for example. Moreover, it can be used as a driver for other types of radiation, and to push the limits of how short a light pulse could be. <br /></div> <div> </div> <div>“An ultra-intense pulse is like a great tsunami of light. ​The wave can pull an electron out of an atom, accelerating it to almost the speed of light, creating exotic quantum states. This is the fastest and strongest switch possible, and it paves the way for advances in fundamental research,” says Dr Illia Thiele. <br /></div> <div> </div> <div><span><span style="background-color:initial"><img src="/en/departments/physics/news/Documents/siminos_large.jpg_webb_300x450.jpg" alt="siminos_large.jpg_webb_300x450.jpg" class="chalmersPosition-FloatRight" style="margin:5px;width:150px;height:225px" /></span></span>The new pulses can be used to probe and control matter in unique ways. While other light pulses, with multiple wave periods, impose changes in the material properties gradually, pulses with a single strong wave period cause sudden and unexpected reactions. <br /><br />&quot;The uniqueness of our method lies in the fact that an indestructible medium <span><span style="background-color:initial">–<span style="display:inline-block"></span></span></span> an electron beam <span><span style="background-color:initial">–<span style="display:inline-block"></span></span></span> is used as an amplifier, allowing more intense pulses to be created,&quot; says Evangelos Siminos, Assistant Professor at the University of Gothenburg.<br /></div> <div><span style="background-color:initial"></span> </div> </span><span style="background-color:initial"><div>Researchers worldwide have tried to create this source of radiation, since it is of high interest for the scientific communities within physics and material science.  <br /></div> <div> </div> <div><span><span style="background-color:initial"><img class="chalmersPosition-FloatRight" src="/SiteCollectionImages/Institutioner/F/Blandade%20dimensioner%20inne%20i%20artikel/TundeFulop_180829_270x.jpg" alt="" style="margin:5px;width:150px;height:223px" /><span style="background-color:initial"></span></span></span>“Now, we hope to be able to bring our theoretical setup to the lab. Our method could help close the existing gaps in the scientific landscape of light sources,” says Tünde Fülöp, Professor of Physics at Chalmers. <br /> </div> <div>Read the scientific paper <a href="https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.122.104803">Electron beam driven generation of frequency-tunable isolated relativistic sub-cycle pulses ​</a>in Physical Review Letters. ​<br /></div> <div> </div> <div>Text: Mia Halleröd Palmgren, <a href="mailto:mia.hallerodpalmgren@chalmers.se">mia.hallerodpalmgren@chalmers.se</a></div> <div><span style="background-color:initial">Photo of Tünde Fülöp: </span><span style="background-color:initial">Johan Bodell</span><br /></div> <div>Photo of Illia Thiele: Mia Halleröd Palmgren ​<span style="background-color:initial">​</span><br /></div> <div><span style="background-color:initial">Photo of Evangelos Siminos: Adam Stahl</span></div> <div><br /> </div> <h4 class="chalmersElement-H4">The new method to create ultra-intense light pulses</h4> <div>The researchers propose a method for the generation of ultra-intense light pulses containing less than a single oscillation of the electromagnetic field. These so-called sub-cycle pulses can be used to probe and control matter in unique ways. Conventional methods can only produce sub-cycle pulses of limited field strength: above a certain threshold the amplifying medium would be ionized by the intense fields. The researchers propose to use an electron beam in a plasma, which is not subject to a damage threshold, as an amplifying medium for a seed electromagnetic pulse. To ensure that energy is transferred from the electron beam to the pulse in such a way that a sub-cycle pulse is produced, the beam needs to be introduced at an appropriate phase of the oscillation of the electromagnetic field. This can be achieved by using a mirror to reflect the seed pulse while the electron beam is being injected. This scenario leads to significant amplification of the seed pulse and the formation of an intense, isolated, sub-cycle pulse. Readily available terahertz seed pulses and electron bunches from laser-plasma accelerators could generate mid-infrared sub-cycle pulses with millijoule-level energies, which are highly desirable as probes of matter but not possible to produce with conventional sources.</div> <div><br /> </div> <h4 class="chalmersElement-H4">For more information: </h4> <div><a href="http://www.chalmers.se/en/Staff/Pages/Illia-Thiele.aspx">Illia Thiele</a>, Postdoctoral researcher, Department of Physics, Chalmers University of Technology, +46 76 607 82 79,<a href="mailto:illia.thiele@chalmers.se"> illia.thiele@chalmers.se</a><br /></div> <div> </div> <div><span style="background-color:initial"><a href="/en/staff/Pages/Tünde-Fülöp.aspx">Tünde Fülöp,​</a> Professor, Department of Physics, Chalmers University of Technology, +46 72 986 74 40, </span><a href="mailto:tunde.fulop@chalmers.se">tunde.fulop@chalmers.se</a></div> <div><br /><a href="https://www.physics.gu.se/english/about-the-department/staff/?languageId=100001&amp;disableRedirect=true&amp;returnUrl=http://www.physics.gu.se/om-institutionen/personal/?languageId%3D100000%26userId%3Dxsimev&amp;userId=xsimev">Evangelos Siminos</a>, Assistant Professor, Department of Physics, University of Gothenburg</div></span><div><span style="background-color:initial">+46 31 786 9161, <a href="mailto:evangelos.siminos@physics.gu.se">evangelos.siminos@physics.gu.se</a></span></div>Tue, 19 Mar 2019 07:00:00 +0100