Dresden 2013 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 115: Beschleunigerphysik II (PWA I)
T 115.2: Vortrag
Montag, 4. März 2013, 11:15–11:30, WIL-C205
Laser-Based Discharge Ignition for Capillary Waveguides — •Lars Goldberg1, Lucas Schaper2, Tobias Kleinwächter2, Jan-Patrick Schwinkendorf2, Matthias Schnepp1, and Jens Osterhoff2 — 1Universität Hamburg — 2DESY Hamburg
Highly energetic electron beams are required for various applications such as free-electron lasers and particle colliders. Nowadays these beams are almost exclusively produced in conventional radiofrequency-cavities, which are limited to typical acceleration gradients below 50MV/m. Hence long machines on the order of 100m are required to reach the desired energies. Laser-wakefield accelerators in plasma on the other hand are capable of providing acceleration gradients well above 10GV/m, thereby allowing for much more compact devices on scales of centimeters.
Currently, plasma-based devices are rapidly evolving and improving, but still suffer from instabilities in the generated electron-beam properties, largely due to shot-to-shot variations of laser and plasma parameters. In order to minimize possible sources for these fluctuations, a novel, more stable technique for shaping the transverse plasma-density profile in a plasma accelerator based on laser triggering and ignition of capillary discharge waveguides is presented.