Scientific Results

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

Year: 2006

Authors: Hosokai T., Kinoshita K., Ohkubo T., Maekawa A., Uesaka M., Zhidkov A., Yamazaki A., Kotaki H., Kando M., Nakajima K., Bulanov S., Tomassini P., Giulietti A., Giulietti D.

Autors Affiliation: Advanced Photon Research Center, Japan Atomic Energy Agency, 8-1 Umemi-dai, Kizu, Soraku, Kyoto 619-0215, Japan;
Intense Laser Irradiation Laboratory, IPCF, Area della Ricerca del CNR di Pisa via Moruzzi 1, 56124 Pisa, Italy

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 8×10(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.


Volume: 73 (3)      Pages from: 036407-1  to: 036407-8

DOI: 10.1103/PhysRevE.73.036407

Citations: 81
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