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

Journal Article · Wed Mar 15 04:00:00 EST 2006 · Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics

DOI:https://doi.org/10.1103/PHYSREVE.73.0· OSTI ID:20778880

Hosokai, Tomonao; Kinoshita, Kenichi; Ohkubo, Takeru; Maekawa, Akira; Uesaka, Mitsuru; Zhidkov, Alexei; Yamazaki, Atsushi; Kotaki, Hideyuki; Kando, Masaki; Nakajima, Kazuhisa; Bulanov, Sergei V; Tomassini, Paolo; Giulietti, Antonio; Giulietti, Danilo ^[1]

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1. Nuclear Professional School, Graduate School of Engineering, University of Tokyo, 22-2 Shirane-shirakata, Tokai, Naka, Ibaraki 319-1188 (Japan)

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 {approx}11.5 MeV [{delta}E/E{approx}10% (FWHM)] and with a narrow-cone angle (0.04{pi} mm mrad) of ejection is detected at a plasma density of 8x10{sup 19} cm{sup -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.

• OSTI ID: 20778880
• Journal Information: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics, Journal Name: Physical Review. E, Statistical Physics, Plasmas, Fluids, and Related Interdisciplinary Topics Journal Issue: 3 Vol. 73; ISSN PLEEE8; ISSN 1063-651X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
BEAM BUNCHING
ELECTRON BEAMS
HELIUM
LASERS
MEV RANGE 10-100
PLASMA
PLASMA DENSITY
PLASMA SIMULATION
TWO-DIMENSIONAL CALCULATIONS
WAKEFIELD ACCELERATORS