Observation of strong correlation between quasimonoenergetic electron beam generation by laser wakefield and laser guiding inside a preplasma cavity.
Observation of strong correlation between quasimonoenergetic electron beam generation by laser wakefield and laser guiding inside a preplasma cavity.
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DOI：
10.1103/physreve.73.036407
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发表时间：
2006-03
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通讯作者：
T. Hosokai;K. Kinoshita;T. Ohkubo;A. Maekawa;M. Uesaka;A. Zhidkov;A. Yamazaki;H. Kotaki;M. Kando;K. Nakajima;S. V. Bulanov;P. Tomassini;A. Giulietti;D. Giulietti
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文献类型：
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作者：
T. Hosokai;K. Kinoshita;T. Ohkubo;A. Maekawa;M. Uesaka;A. Zhidkov;A. Yamazaki;H. Kotaki;M. Kando;K. Nakajima;S. V. Bulanov;P. Tomassini;A. Giulietti;D. Giulietti
利用单次测量技术研究了激光预脉冲对致密氦气射流中相对强激光脉冲（λ =790 nm, 11 TW, 37 fs）驱动的电子激光尾流场加速度的影响。在等离子体密度为8 × 10(19) cm（-3）时，检测到一个准单能电子束，其能量峰值约为11.5 MeV[δ E/E约为10% (FWHM)]，弹射角为窄锥角（0.04 mm mrad）。在皮秒激光预脉冲产生的薄通道中，单能电子的产生与脉冲的光导之间存在很强的相关性。这种生成机制得到了二维细胞内粒子模拟的证实。
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 approximately 11.5 MeV[DeltaE/E approximately 10% (FWHM)] and with a narrow-cone angle (0.04pi mm mrad) of ejection is detected at a plasma density of 8 x 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.