Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (10): 147

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS •

Evaluation of radiation environment in the target area of fragment separator HFRS at HIAF

Yao Yang 1,2 • You-Wu Su 1 • Wu-Yuan Li 1 • Jun-Kui Xu 1 • Chong Xu 1 • Wei-Wei Yan 1 • Wang Mao 1

1. 1 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
2 University of Chinese Academy of Sciences, Beijing 100049, China
• Contact: You-Wu Su E-mail:suyouwu@impcas.ac.cn
• Supported by:

This work was supported by the National Key Research and Development Program of China (No. 2017YFC0107700).

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Yao Yang, You-Wu Su, Wu-Yuan Li, Jun-Kui Xu, Chong Xu, Wei-Wei Yan, Wang Mao. Evaluation of radiation environment in the target area of fragment separator HFRS at HIAF.Nuclear Science and Techniques, 2018, 29(10): 147
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Abstract:

In this work, the radiation environment in the target area of a fragment separator is evaluated using FLUKA code. The energy deposition in quadrupole coils is presented to provide guidance for a radiation-resistant magnets design. Results show that neutrons dominate in the prompt radiation field. A compact shielding design is recommended for high radiation areas along with the minimization of air activation in the tunnel in order to minimize the radiation effect on nearby beam lines. The displacements per atom results for the graphite target and copper coils indicate that the effect is insignificant. In addition, the activation level of the target is estimated for workers under possible hands-on maintenance condition.