使用经高对比度激光脉冲辐照的尺寸优化团簇靶增强氩和氪的Kα输出。

Enhanced Kα output of Ar and Kr using size optimized cluster target irradiated by high-contrast laser pulses.

作者信息

Zhang Lu, Chen Li-Ming, Yuan Da-Wei, Yan Wen-Chao, Wang Zhao-Hua, Liu Cheng, Shen Zhong-Wei, Faenov Anatoly, Pikuz Tatiana, Skobelev Igor, Gasilov Vladimir, Boldarev Alexei, Mao Jing-Yi, Li Yu-Tong, Dong Quan-Li, Lu Xin, Ma Jing-Long, Wang Wei-Ming, Sheng Zheng-Ming, Zhang Jie

机构信息

Beijing National Laboratory of Condensed Matter Physics, Institute of Physics, CAS, Beijing, China.

出版信息

Opt Express. 2011 Dec 5;19(25):25812-22. doi: 10.1364/OE.19.025812.

DOI:10.1364/OE.19.025812

PMID:22273974

Abstract

We observed that increasing the clusters size and laser pulse contrast can enhance the X-ray flux emitted by femtosecond-laser-driven-cluster plasma. By focusing a high contrast laser (10(-10)) on large argon clusters, high flux Kα-like X-rays (around 2.96 keV) is generated with a total flux of 2.5 × 10(11) photons/J in 4π and a conversion efficiency of 1.2 × 10-4. In the case of large Kr clusters, the best total flux for L-shell X-rays is 5.3 × 1011 photons/J with a conversion efficiency of 1.3 × 10-4 and, for the Kα X-ray (12.7 keV), it is 8 × 10(8) photons/J with a conversion efficiency of 1.6 × 10-6. Using this X-ray source, a single-shot high-performance X-ray imaging is demonstrated.

摘要

我们观察到，增大团簇尺寸和激光脉冲对比度能够增强飞秒激光驱动团簇等离子体发射的X射线通量。通过将高对比度激光（10^(-10)）聚焦在大尺寸氩团簇上，可产生高通量类Kα X射线（约2.96 keV），其在4π立体角内的总通量为2.5×10^(11) 光子/焦耳，转换效率为1.2×10^(-4)。对于大尺寸氪团簇，L壳层X射线的最佳总通量为5.3×10^(11) 光子/焦耳，转换效率为1.3×10^(-4)；对于Kα X射线（12.7 keV），其总通量为8×10^(8) 光子/焦耳，转换效率为1.6×10^(-6)。利用该X射线源，演示了单次高性能X射线成像。