Laser wake field acceleration: the highly non-linear broken-wave regime |
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Authors: | A Pukhov J Meyer-ter-Vehn |
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Institution: | Institut für Theoretische Physik I, Heinrich-Heine-Universit?t Düsseldorf, 40225 Düsseldorf, Germany, DE Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching, Germany, DE
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Abstract: | We use three-dimensional particle-in-cell simulations to study laser wake field acceleration (LWFA) at highly relativistic
laser intensities. We observe ultra-short electron bunches emerging from laser wake fields driven above the wave-breaking
threshold by few-cycle laser pulses shorter than the plasma wavelength. We find a new regime in which the laser wake takes
the shape of a solitary plasma cavity. It traps background electrons continuously and accelerates them. We show that 12-J,
33-fs laser pulses may produce bunches of 3×1010 electrons with energy sharply peaked around 300 MeV. These electrons emerge as low-emittance beams from plasma layers just
700-μm thick. We also address a regime intermediate between direct laser acceleration and LWFA, when the laser-pulse duration
is comparable with the plasma period.
Received: 12 December 2001 / Published online: 14 March 2002 |
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Keywords: | PACS: 52 38 Kd 52 35 -g 41 75 Ht |
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