Universität München and the Lawrence Berkeley Laboratory. The GSI is an ideal location for this research project, as it combines two high power laser systems as well as the necessary rf infrastructure [...] interacts with the plasma at the critical surface and accelerates hot electrons into the target material (b). The electrons are transported under a divergence angle through the target, leave the rear side [...] studies on ion stopping power but also expand the use of laser-driven ion sources in medical physics, materials science, and radiation therapy. One current investigation concerns the generation of an ion beam