Polarization control of electron and ion acceleration in relativistic laser-foil interactions

​Seminar by Paul McKenna, University of Strathclyde

​Abstract of talk

Controlling the collective motion of charged particles in intense laser-plasma interactions is important for the development of laser-driven accelerators and radiation sources, as well as facilitating investigations into laboratory astrophysical phenomena. I will discuss our recent results which show that the interaction of an intense laser pulse with an ultrathin foil target induces relativistic self-induced transparency over a localized region at the peak of the laser focus and that Fresnel diffraction of the transmitted laser light produces transverse ponderomotive displacement of fast electrons. By varying the ellipticity of the laser polarization, the resulting electron beam and induced magnetic field structures can be made to rotate at fixed or variable angular frequencies. The resulting modulation of the charge-separation-induced electrostatic field means that the ion motion can also be manipulated. These concepts have been explored experimentally and in 3D particle-in-cell simulations, and provide a new avenue of optical control of laser-driven particle beams.
Category Seminar
Location: N6115
Starts: 09 November, 2016, 13:15
Ends: 09 November, 2016, 14:00

Published: Thu 20 Oct 2016.