Gamma-ray emission from wakefield-accelerated electrons wiggling in a laser field
Gamma-ray emission from wakefield-accelerated electrons wiggling in a laser field
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激光场中摆动的尾场加速电子发出的伽马射线
DOI：
10.1038/s41598-019-38777-3
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发表时间：
2019
影响因子：
4.6
通讯作者：
Liming Chen
中科院分区：
文献类型：
--
作者：
Jie Feng;Yifei Li;Jinguang Wang;Dazhang Li;Fang Li;Wenchao Yan;Weimin Wang;Liming Chen
电子在激光等离子体韦克菲尔德场中的横向电子感应加速器运动可产生超快同步辐射，辐射谱峰可达几十keV。在这里，我们提出了一种新的方法来实现高能辐射，通过加速电子摆动在一个额外的激光场的强度是一个数量级以上的自发横向场的气泡，导致在一个等效的摇摆器强度参数K增加约20倍。通过对同步辐射的计算，得到了1 MeV激光扭摆器场为1.2 × 10 ~（23）ph/s/mrad ~ 2/mm ~ 2/0.1%BW时的峰值亮度。这种高亮度和超快的伽马射线源可以应用于致密材料的时间分辨探测和医用放射性同位素的生产。
Ultra-fast synchrotron radiation emission can arise from the transverse betatron motion of an electron in a laser plasma wakefield, and the radiation spectral peak is limited to tens of keV. Here, we present a new method for achieving high-energy radiation via accelerated electrons wiggling in an additional laser field whose intensity is one order of magnitude higher than that for the self-generated transverse field of the bubble, resulting in an equivalent wiggler strength parameter K increase of approximately twenty times. By calculating synchrotron radiation, we acquired a peak brightness for the case of the laser wiggler field of 1.2 × 1023ph/s/mrad2/mm2/0.1%BW at 1 MeV. Such a high brilliance and ultra-fast gamma-ray source could be applied to time-resolved probing of dense materials and the production of medical radioisotopes.