We use a one-shot measurement technique to study effects of laser prepulses on the electron laser wakefield acceleration driven by relativistically intense laser pulses (lambda=790 nm, 11 TW, 37 fs) in dense helium gas jets. A quasimonoenergetic electron bunch with an energy peak similar to 11.5 MeV [Delta E/E similar to 10% (FWHM)] and with a narrow-cone angle (0.04 pi mm mrad) of ejection is detected at a plasma density of 8x10(19) cm(-3). A strong correlation between the generation of monoenergetic electrons and optical guiding of the pulse in a thin channel produced by picosecond laser prepulses is observed. This generation mechanism is well corroborated by two-dimensional particle-in-cell simulations.

Observation of strong correlation between quasimonoenergetic electron beam generation by laser wakefield and laser guiding inside a preplasma cavity

GIULIETTI, DANILO
2006

Abstract

We use a one-shot measurement technique to study effects of laser prepulses on the electron laser wakefield acceleration driven by relativistically intense laser pulses (lambda=790 nm, 11 TW, 37 fs) in dense helium gas jets. A quasimonoenergetic electron bunch with an energy peak similar to 11.5 MeV [Delta E/E similar to 10% (FWHM)] and with a narrow-cone angle (0.04 pi mm mrad) of ejection is detected at a plasma density of 8x10(19) cm(-3). A strong correlation between the generation of monoenergetic electrons and optical guiding of the pulse in a thin channel produced by picosecond laser prepulses is observed. This generation mechanism is well corroborated by two-dimensional particle-in-cell simulations.
Hosokai, T; Kinoshita, K; Ohkubo, T; Maekawa, A; Uesaka, M; Zhidkov, A; Yamazaki, A; Kotaki, H; Kando, M; Nakajima, K; Bulanov, Sv; Tomassini, P; Giulietti, A; Giulietti, Danilo
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11568/205198
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