Düsseldorf 2007 – wissenschaftliches Programm
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K: Fachverband Kurzzeitphysik
K 6: Kurzpulslaseranwendungen
K 6.2: Vortrag
Dienstag, 20. März 2007, 15:00–15:15, 6E
Acceleration of quasimonoenergetic, ultrashort (<5 fs) electron bunches via interaction of single relativistic laser pulses with gas jets — •Bernhard Hidding1, Stefan Karsch2, Laszlo Veisz2, Karl Schmid2, Michael Geissler2,3, Heiner Schwoerer4, Georg Pretzler1, and Roland Sauerbrey5 — 1Heinrich-Heine-Universität Düsseldorf, Germany — 2Max-Planck-Institut für Quantenoptik, Garching, Germany — 3Queen's University of Belfast, UK — 4Friedrich-Schiller-Universität Jena, Germany — 5Forschungszentrum Rossendorf, Germany
Since 2004, several experiments have succeeded in producing multi-MeV quasimonoenergetic electron bunches from laser-plasma-interaction. The so-called bubble-acceleration principle is in particular intriguing because it requires the interaction of only one single relativistic laser pulse with a gas jet. So far no experiments dealt with parameters that enabled entering the bubble regime right from the beginning of the interaction. At the Jena JETI laser, we made use of promoted self-modulation in order to overcome the necessary bubble power threshold, producing quasimonoenergetic electrons with bunch durations of only a few fs. Different measurement techniques will be presented. In Düsseldorf, we currently install laser systems with laser pulse durations <20 fs, which can fulfill the requirements of the bubble regime directly without needing self-modulation, which can be a helpful process but is believed to evoke large shot-to-shot-variations. The electron bunch properties that can be expected as the result of the aimed laser parameters will be discussed.