Bonn 2010 – wissenschaftliches Programm
HK 11.3: Vortrag
Montag, 15. März 2010, 17:15–17:30, HG ÜR 8
Evolution of Electron-Bunch Parameters during Laser-Wakefield Acceleration — •Antonia Popp1,2, Raphael Weingartner1,2, Jens Osterhoff1,3, Matthias Fuchs1,2, Johannes Wenz1, Matthias Heigoldt1, Shao-Wei Chou1, Andreas Maier1, Konstantin Khrennikov1, Zsuzsanna Major1,2, Florian Grüner1,2, Ferenc Krausz1,2, and Stefan Karsch1,2 — 1Max-Planck-Institute of Quantum Optics, Garching, Germany — 2Ludwig-Maximilians-University, Munich, Germany — 3LOASIS Program, Lawrence Berkeley National Laboratory, Berkeley, USA
In several proof-of-principle experiments it has been demonstrated that laser-wakefield acceleration of relativistic electrons could be a promising complement to conventional accelerator systems for certain applications. Despite major improvements of the beam quality over the last years, laser-accelerated electron bunches still have not reached the parameters and controllability eventually indispensable for their employment in e.g. X-ray generation.
In the presented work the evolution of the electron bunch properties during the acceleration process is studied. By changing the acceleration distance using a variable-length gas cell, the bunch is extracted in different phases. Thus it is possible both to gain better insight into the underlying physics and to optimize and to a certain degree even control the final electron beam parameters. The experimental results are supported by full-scale three-dimensional particle-in-cell simulations.