This grant supports a PhD student who applies ballistic imaging to sprays and further develops the technique. Ballistic imaging is a technique that allows one to image larger structures buried inside a dense could of small drops (see ““Ballistic Imaging of Liquid Breakup Processes in Dense Sprays”, M. Linne, M. Paciaroni, E. Berrocal and D. Sedarsky, invited review article, Proceedings of the Combustion Institute, Vol. 32, pp. 2147-2161, (2009)). It is like creation of a shadowgram as though the drops did not exist. It uses high energy pulses that are 100 fs long, emitted by a Ti:sapphire amplifier system.