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

Mei-Qi Song; Qing-Min Zhang; Yu-Hang Guo; Kai Li; Hai-Xiao Deng

doi:10.1088/1674-1137/40/4/048101

Chinese Physics C> 2016, Vol. 40> Issue(4) : 048101 DOI: 10.1088/1674-1137/40/4/048101

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

1.
Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China
2.
Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

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Abstract：
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.
- X-ray pulse ,
- diamond crystal ,
- energy deposition ,
- X-ray FEL oscillator

References

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Mei-Qi Song, Qing-Min Zhang, Yu-Hang Guo, Kai Li and Hai-Xiao Deng. Numerical modeling of thermal loading of diamond crystal in X-ray FEL oscillators[J]. Chinese Physics C, 2016, 40(4): 048101. doi: 10.1088/1674-1137/40/4/048101

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Received: 2015-10-15

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Supported by National Natural Science Foundation of China(11175240, 11205234, 11322550) and Program for Changjiang Scholars and Innovative Research Team in University(IRT1280)

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通讯作者: 陈斌, [email protected]

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author: Qing-Min Zhang,

1. Department of Nuclear Science and Technology, School of Energy and Power Engineering, Xi'an Jiaotong University, Xi'an 710049, China

2. Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China

Received Date: 2015-10-15

Available Online: 2016-03-28

Fund Project: Supported by National Natural Science Foundation of China(11175240, 11205234, 11322550) and Program for Changjiang Scholars and Innovative Research Team in University(IRT1280)

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

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