Femtosecond x-ray pulses at 0.4 angstrom generated by 90 degrees Thomson scattering: A tool for probing the structural dynamics of materials
Femtosecond x-ray pulses at 0.4 angstrom generated by 90 degrees Thomson scattering: A tool for probing the structural dynamics of materials
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DOI：
10.1126/science.274.5285.236
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发表时间：
1996-10-11
期刊：
影响因子：
56.9
通讯作者：
Shank, CV
中科院分区：
文献类型：
--
作者：
Schoenlein, RW;Leemans, WP;Shank, CV
波长为0.4埃、持续时间为300飞秒的x射线脉冲（30，000电子伏特）已经通过来自加速器的红外太瓦激光脉冲和高度相对论性电子之间的90度汤姆逊散射产生。在直角散射几何结构中，X射线爆发的持续时间由激光脉冲穿过聚焦电子束的近似90微米腰部的渡越时间确定，X射线是高度定向的（类似于0.6度发散），并且可以调整能量。这种飞秒x射线源将使联合收割机x射线技术与超快时间分辨率相结合，以研究凝聚态物质的结构动力学成为可能。
Pulses of x-rays 300 femtoseconds in duration at a wavelength of 0.4 angstroms (30,000 electron volts) have been generated by 90 degrees Thomson scattering between infrared tera-watt laser pulses and highly relativistic electrons from an accelerator, In the right-angle scattering geometry, the duration of the x-ray burst is determined by the transit time of the laser pulse across the similar to 90-micrometer waist of the focused electron beam, The x-rays are highly directed (similar to 0.6 degrees divergence) and can be tuned in energy. This source of femtosecond x-rays will make it possible to combine x-ray techniques with ultrafast time resolution to investigate structural dynamics in condensed matter.