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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Beschleunigerphysik VI

HK 11.2: Vortrag

Montag, 15. März 2010, 17:00–17:15, HG ÜR 8

On the way to stabilized laser-driven GeV electrons — •Shao-wei Chou^1,2, Tobias Weineisen^1,2, Jens Osterhoff³, Matthias Fuchs^1,2, Antonia Popp^1,2, Zsuzsanna Major^1,2, Hartmut Schröder¹, Raphael Weingartner^1,2, Izhar Ahmad^1,2, Karl Schmid^1,2, Harald Haas¹, Benjamin Marx^1,2, Ferenc Krausz^1,2, Florian Grüner^1,2, Stefan Karsch^1,2, 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.