Design of the radiation shield and collimator for neutron and gamma-ray diagnostics at EAST

被引：5

作者：

Chen, Weikun ^{[1
,2
]}

Hu, Liqun ^{[1
]}

Zhong, Guoqiang ^{[1
]}

Hong, Bing ^{[1
]}

Zhou, Ruijie ^{[1
]}

Li, Kai ^{[1
]}

Huang, Liangsheng ^{[1
,2
]}

Cao, Hongrui ^{[1
]}

机构：

[1] Chinese Acad Sci, Inst Plasma Phys, Hefei Inst Phys Sci, Hefei 230031, Peoples R China

[2] Univ Sci & Technol China, Hefei 230026, Peoples R China

来源：

FUSION ENGINEERING AND DESIGN | 2021年 / 172卷

基金：

中国国家自然科学基金;

关键词：

Fusion neutron; Gamma-ray; Collimator; Radiation shield; Tokamak;

D O I：

10.1016/j.fusengdes.2021.112775

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

New compact radiation shields have been designed to reduce the scattered neutrons and background gamma-rays for neutron and gamma-ray diagnostics in the EAST hall. The design focused on optimizing radiation shielding performance versus volume and weight to fit the small amount of available space outside the tokamak device. Based on the Monte Carlo method and using the Geant4 tool kit, three-dimensional models of the shield were created for material selection and structural design optimization. The 10-cm and 15-cm polyethylene doped with 12 wt.% B4C, and 10-cm cast lead were finally selected for the main body of the shield. In addition, the shape and structure of the collimator in the front half of the shield are optimized, and a replaceable aperture adjuster module design has been adopted for the collimator. For incident particles with different energies, the collimation efficiency of the collimator has also been calculated.

引用

页数：8

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