Time-resolved X-ray diffraction from laser-heated crystals

被引:0
|
作者
Larsson, J
Judd, E
Falcone, RW
Asfaw, A
Lee, RW
Heimann, PA
Padmore, HA
Wark, J
机构
[1] LAWRENCE LIVERMORE NATL LAB, LIVERMORE, CA USA
[2] LAWRENCE BERKELEY LAB, BERKELEY, CA USA
[3] UNIV OXFORD, CLARENDON LAB, OXFORD OX1 3PU, ENGLAND
来源
X-RAY LASERS 1996 | 1996年 / 151期
关键词
D O I
暂无
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present first results in an ongoing investigation aimed at observing xray radiation from a synchrotron with sub-ps time-resolution. We aim to implement a switch based on ultra-short pulse laser heating of diffraction crystals. In these first experiments performed with a q-switched Nd:YAG laser, the temporal resolution of the experiment is 15 ns limited by the response time of our detector. We find a change in diffracted intensity, due to thermal expansion of the crystal over an x-ray absorption depth. The reduction in diffracted intensity is limited by the laser fluence to about 15%. We also show theoretical results based on the solution of the time-resolved dynamic diffraction equations for the case of x-ray diffraction from a crystal heated with a sub-ps laser pulse. Results for both Si and InP are discussed, and we propose InP as a good crystal for future experiments.
引用
收藏
页码:367 / 371
页数:5
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