Study on Thermal Shock Damage to Injector II of China ADS Project

HE Shoubo; HE Yuan; WANG Zhijun; YANG Yangyang; ZHANG Shenghu; ZHAO Hongwei

doi:10.11804/NuclPhysRev.31.03.385

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Article Navigation > Nuclear Physics Review > 2014 > 31(3): 385-390

HE Shoubo, HE Yuan, WANG Zhijun, YANG Yangyang, ZHANG Shenghu, ZHAO Hongwei. Study on Thermal Shock Damage to Injector II of China ADS Project[J]. Nuclear Physics Review, 2014, 31(3): 385-390. doi: 10.11804/NuclPhysRev.31.03.385

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HE Shoubo, HE Yuan, WANG Zhijun, YANG Yangyang, ZHANG Shenghu, ZHAO Hongwei. Study on Thermal Shock Damage to Injector II of China ADS Project[J]. Nuclear Physics Review, 2014, 31(3): 385-390. doi: 10.11804/NuclPhysRev.31.03.385

Study on Thermal Shock Damage to Injector II of China ADS Project

doi: 10.11804/NuclPhysRev.31.03.385

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2014-09-20

Abstract

Because of injecting an out-of-control beam pulse, thermal shock damage to the accelerator may well cause a failure of focusing and steering elements. In order to prevent RFQ accelerator,superconducting cavities and other accelerator components from thermal damage, t is essential to conduct a quantitative evaluation of the thermal stresses induced in the material during the thermal shock. The present study in this paper proposed a novel method to evaluate the thermal stresses quantitatively, which can clarify the characteristics of thermal shock of several materials, such as OFHC, SUS304 and Niobium. Transitional thermal stress is investigated by three dimensional nite element method (FEM) to obtain the temperature distribution for three materials at the beam incident angle of 90°. Finally the simulation results prove that the machine protect system response time meets the requirement when the allowable injection time is de ned as 20 μs.
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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

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Study on Thermal Shock Damage to Injector II of China ADS Project

doi: 10.11804/NuclPhysRev.31.03.385

Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China;

Received Date: 1900-01-01
Rev Recd Date: 1900-01-01
Publish Date: 2014-09-20

Abstract: Because of injecting an out-of-control beam pulse, thermal shock damage to the accelerator may well cause a failure of focusing and steering elements. In order to prevent RFQ accelerator,superconducting cavities and other accelerator components from thermal damage, t is essential to conduct a quantitative evaluation of the thermal stresses induced in the material during the thermal shock. The present study in this paper proposed a novel method to evaluate the thermal stresses quantitatively, which can clarify the characteristics of thermal shock of several materials, such as OFHC, SUS304 and Niobium. Transitional thermal stress is investigated by three dimensional nite element method (FEM) to obtain the temperature distribution for three materials at the beam incident angle of 90°. Finally the simulation results prove that the machine protect system response time meets the requirement when the allowable injection time is de ned as 20 μs.

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