Generation of femtosecond γ-ray bursts stimulated by laser-driven hosing evolution.
Generation of femtosecond γ-ray bursts stimulated by laser-driven hosing evolution.
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激光驱动软管演化激发飞秒伽马射线暴的产生
DOI：
10.1038/srep30491
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发表时间：
2016-07-26
影响因子：
4.6
通讯作者：
Zhang J
中科院分区：
文献类型：
--
作者：
Ma Y;Chen L;Li D;Yan W;Huang K;Chen M;Sheng Z;Nakajima K;Tajima T;Zhang J
基于激光韦克菲尔德加速的等离子体摆动器具有产生几keV到几百keV光子能量和1022-1023 photons/s/mm ~ 2/mrad ~ 2/0.1%BW峰值亮度的电子回旋加速器X射线的能力，为大规模同步辐射光源提供了一种替代方案。产生电子感应加速器辐射的大多数方法基于两种典型的方法，一种依赖于固有的横向聚焦静电场，其引起横向振荡，另一种依赖于电子束赶上激光脉冲的后部，其导致强电子共振。本文提出了一种新的自陡激光脉冲的载波包络相位（CEP）效应引起的磁泡振荡，通过激励连续注入的电子束团产生大幅度横向振荡，从而产生电子感应加速器γ射线辐射。我们的方法增加了临界光子能量的MeV的水平，根据粒子在细胞（PIC）模拟的结果。这种方法产生的高准直、高能和飞秒γ射线暴可能为研究台式光子核反应中的核物理提供一种有趣的潜在手段。
The promising ability of a plasma wiggler based on laser wakefield acceleration to produce betatron X-rays with photon energies of a few keV to hundreds of keV and a peak brilliance of 1022–1023 photons/s/mm2/mrad2/0.1%BW has been demonstrated, providing an alternative to large-scale synchrotron light sources. Most methods for generating betatron radiation are based on two typical approaches, one relying on an inherent transverse focusing electrostatic field, which induces transverse oscillation, and the other relying on the electron beam catching up with the rear part of the laser pulse, which results in strong electron resonance. Here, we present a new regime of betatron γ-ray radiation generated by stimulating a large-amplitude transverse oscillation of a continuously injected electron bunch through the hosing of the bubble induced by the carrier envelope phase (CEP) effect of the self-steepened laser pulse. Our method increases the critical photon energy to the MeV level, according to the results of particle-in-cell (PIC) simulations. The highly collimated, energetic and femtosecond γ-ray bursts that are produced in this way may provide an interesting potential means of exploring nuclear physics in table top photo nuclear reactions.