Plasmaphysik Seminar

# Collective Laser Ion Acceleration by the Use of Mass Limited Near Critical Plasmas at the PHELIX Laser Facility

## by Peter Hilz (HI Jena)

Tuesday, April 17, 2018 from to (Europe/Berlin)
at GSI Darmstadt ( KBW Hörsaal )
 Description Laser plasma based acceleration mechanisms are investigated by a rapidly growing scientific community. This talk will present experimental results on proton acceleration obtained at the Phelix laser by the use of mass limited targets. Hereby the Phelix laser was used to irradiate single levitated spheres with sub focus diameter (1µm). The particles were positioned and stabilized into the interaction region by the use of a Paul Trap. Prior to the main pulse the target already expands to near/subcritical densities. The acceleration dynamics in such a system lead to mono energetic proton beams with a mean kinetic energy of 25-30 MeV and a few MeV bandwidth. The experimental results were reproduced in a 3D PIC simulation. The simulation further allowed to identify the underlying processes and indicates possibilities to optimize this process in the near future.