Simultaneous generation of quasi-monoenergetic electron and betatron X-rays from nitrogen gas via ionization injection
Simultaneous generation of quasi-monoenergetic electron and betatron X-rays from nitrogen gas via ionization injection
复制标题
通过电离注入从氮气中同时产生准单能电子和电子感应加速器 X 射线
DOI：
10.1063/1.4902127
复制
发表时间：
2014-11-17
影响因子：
4
通讯作者：
Chen, L. M.
中科院分区：
文献类型：
--
作者：
Huang, K.;Li, D. Z.;Chen, L. M.
在60 TW钛宝石激光脉冲与4 mm长的超音速氮气射流相互作用时，产生了沿着的定向X射线辐射，并产生了峰值能量为130 MeV、相对能量扩展为20%的稳定准单能电子束。电子感应加速器的X射线辐射有一个7.5 mrad的小发散角和一个4 keV的临界能量。激光韦克菲尔德加速过程是在背景等离子体密度仅为5.4 × 1017 cm−3的情况下，利用电离注入来激发的。激光脉冲在纯氮等离子体中的非自聚焦和稳定传输是同时产生高质量X射线和电子束的原因。这些超短光束和自然同步光束可以应用于超快泵浦探测实验。
Upon the interaction of 60 TW Ti: sapphire laser pulses with 4 mm long supersonic nitrogen gas jet, a directional x-ray emission was generated along with the generation of stable quasi-monoenergetic electron beams having a peak energy of 130 MeV and a relative energy spread of ∼ 20%. The betatron x-ray emission had a small divergence of 7.5 mrad and a critical energy of 4 keV. The laser wakefield acceleration process was stimulated in a background plasma density of merely 5.4 × 1017 cm−3 utilizing ionization injection. The non-self-focusing and stable propagation of the laser pulse in the pure nitrogen gaseous plasma should be responsible for the simultaneous generation of the high-quality X-ray and electron beams. Those ultra-short and naturally-synchronized beams could be applicable to ultrafast pump-probe experiments.