Ultra-short efficient laser-driven hard X-ray source operated at a kHz repetition rate
Ultra-short efficient laser-driven hard X-ray source operated at a kHz repetition rate
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DOI：
10.1007/s00340-004-1658-4
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发表时间：
2004-10-01
影响因子：
2.1
通讯作者：
Elsaesser, T
中科院分区：
文献类型：
--
作者：
Zhavoronkov, N;Gritsai, Y;Elsaesser, T
利用高对比度飞秒激光脉冲与液态镓射流相互作用产生了超短硬X射线辐射。的X射线发射显示出强烈的依赖于入射角和偏振的激光束，共振吸收和真空加热的过程相一致。高达60%的总X射线辐射由Ga K-α辐射（9.22-9.25 keV）组成，光子通量为6 x 10（9）光子/（s srad）。使用这种新型的X射线源，从GaAs（I 11）晶体的静态衍射图案记录与采集时间为2秒。
Ultra-short bursts of hard X-ray radiation are generated by interaction of high-contrast femtosecond laser pulses with a jet of liquid Ga. The X-ray emission shows a strong dependence on the angle of incidence and polarization of the laser beam, consistent with the processes of resonant absorption and vacuum heating. As much as 60% of the total X-ray emission consists of Ga K-alpha, radiation (9.22-9.25 keV) with a photon flux of 6 x 10(9) photons/(s srad). Using this novel X-ray source, static diffraction patterns from a GaAs(I 11) crystal were recorded with an acquisition time of 2 s.