Bonn 2010 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 11: Beschleunigerphysik VI
HK 11.2: Talk
Monday, March 15, 2010, 17:00–17:15, HG ÜR 8
On the way to stabilized laser-driven GeV electrons — •Shao-wei Chou1,2, Tobias Weineisen1,2, Jens Osterhoff3, Matthias Fuchs1,2, Antonia Popp1,2, Zsuzsanna Major1,2, Hartmut Schröder1, Raphael Weingartner1,2, Izhar Ahmad1,2, Karl Schmid1,2, Harald Haas1, Benjamin Marx1,2, Ferenc Krausz1,2, Florian Grüner1,2, Stefan Karsch1,2, Tom Rowlands-Rees4, and Simon Hooker4 — 1Max-Planck Institute of Quantum Optics, Munich, Germany — 2Ludwig-Maximilians University, Munich, Germany — 3LOASIS Programm, Lawrence Livermore National Laboratory, Berkely, USA — 4University of Oxford, Oxford, United Kingdom
Laser-driven-wakefield electron accelerators have shown electron beams with energies of up to 1 GeV from a centimeter-scale plasma accelerator. In order to achieve higher electron energies, these acceleration distances need to be increased. This can be realized with a discharge capillary. However, a discharge typically introduces instabilities on both pointing and energy of the generated electrons. In order to improve the stability, we demonstrate a preliminary test of a modified discharge which includes a pre-pulse circuit before the firing of the main pulse. We also show gas density shaping by a laser- machined nozzle which should be able to make a more precise injection in the capillary accelerator thus reducing the energy instability.