Numerical modeling of thermal loading of diamond crystal in X-ray FEL oscillators

被引：7
|
作者：
Song, Mei-Qi [1 ]
Zhang, Qing-Min [1 ]
Guo, Yu-Hang [1 ]
Li, Kai [2 ]
Deng, Hai-Xiao [2 ]
机构：
[1] Xi An Jiao Tong Univ, Sch Energy & Power Engn, Dept Nucl Sci & Technol, Xian 710049, Peoples R China
[2] Chinese Acad Sci, Shanghai Inst Appl Phys, Shanghai 201800, Peoples R China
来源：
CHINESE PHYSICS C | 2016年 / 40卷 / 04期
基金：
中国国家自然科学基金;
关键词：
X-ray pulse; diamond crystal; energy deposition; X-ray FEL oscillator;
D O I：
10.1088/1674-1137/40/4/048101
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
Due to high reflectivity and high resolution of X-ray pulses, diamond is one of the most popular Bragg crystals serving as the reflecting mirror and mono chromator in the next generation of free electron lasers (FELs). The energy deposition of X-rays will result in thermal heating, and thus lattice expansion of the diamond crystal, which may degrade the performance of X-ray FELs. In this paper, the thermal loading effect of diamond crystal for X-ray FEL oscillators has been systematically studied by combined simulation with Geant4 and ANSYS, and its dependence on the environmental temperature, crystal size, X-ray pulse repetition rate and pulse energy are presented. Our results show that taking the thermal loading effects into account, X-ray FEL oscillators are still robust and promising with an optimized design.
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页数：5
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