Bright tunable femtosecond x-ray emission from laser irradiated micro-droplets
Bright tunable femtosecond x-ray emission from laser irradiated micro-droplets
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激光照射的微滴发出明亮的可调谐飞秒 X 射线
DOI：
10.1063/1.4895928
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发表时间：
2014
影响因子：
4
通讯作者：
er
中科院分区：
文献类型：
--
作者：
Yu Tong-Pu;Hu Li-Xiang;Yin Yan;Shao Fu-Qiu;Zhuo Hong-Bin;Ma Yan-Yun;Yang Xiao-Hu;Luo Wen;Pukhov Alex;er
研究表明，用中等强度的激光照射氦微滴，可以获得明亮的飞秒X射线。激光有质动力不断地从液滴中扫过电子，并使它们向前加速。暴露在输出激光场中的电子横向振荡并向前发射光子。能量在1 keV以上的光子总通量高达109个/次，与在类似激光条件下的电子感应加速器振荡相比提高了约10倍。最大峰值亮度达到1021光子/秒/毫米2/mrad 2/0.1%BW。通过调节激光器和液滴参数，可以得到亮度和能量可调的X射线。
It is demonstrated that bright femtosecond X-rays can be obtained by irradiating a moderate laser onto a helium micro-droplet. The laser ponderomotive force continuously sweeps electrons from the droplets and accelerates them forward. The electrons exposed in the outrunning laser field oscillate transversely and emit photons in the forward direction. The total flux of photons with energies above 1 keV is as high as 109/shot which is about 10-fold enhancement compared with betatron oscillation under similar laser conditions. The maximum achieved peak brightness is up to 1021 photons/s/mm2/mrad2/0.1%BW. By adjusting laser and droplet parameters, we can get tunable X-rays with required brightness and energy.