Simulations of scattered neutrons for the time-of-flight enhanced diagnostics (TOFED) neutron spectrometer on EAST

Jiaqi SUN (孙嘉琪); Zhimeng HU (胡志猛); Lijian GE (葛理健); Yimo ZHANG (张一镆); Tengfei DU (杜腾飞); Xingyu PENG (彭星宇); Zhongjing CHEN (陈忠靖); Xing ZHANG (张兴); Giuseppe GORINI; Massimo NOCENTE; Marco TARDOCCHI; Liqun HU (胡立群); Guoqiang ZHONG (钟国强); Baonian WAN (万宝年); Xiangqing LI (李湘庆); Tieshuan FAN (樊铁栓)

doi:10.1088/2058-6272/ab9529

Plasma Science and Technology > 2020 > 22(8): 84004-084004. > DOI: 10.1088/2058-6272/ab9529

Jiaqi SUN (孙嘉琪), Zhimeng HU (胡志猛), Lijian GE (葛理健), Yimo ZHANG (张一镆), Tengfei DU (杜腾飞), Xingyu PENG (彭星宇), Zhongjing CHEN (陈忠靖), Xing ZHANG (张兴), Giuseppe GORINI, Massimo NOCENTE, Marco TARDOCCHI, Liqun HU (胡立群), Guoqiang ZHONG (钟国强), Baonian WAN (万宝年), Xiangqing LI (李湘庆), Tieshuan FAN (樊铁栓). Simulations of scattered neutrons for the time-of-flight enhanced diagnostics (TOFED) neutron spectrometer on EAST[J]. Plasma Science and Technology, 2020, 22(8): 84004-084004. DOI: 10.1088/2058-6272/ab9529

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Simulations of scattered neutrons for the time-of-flight enhanced diagnostics (TOFED) neutron spectrometer on EAST

¹ School of Physics and State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, People's Republic of China
² Dipartimento di Fisica, Università di Milano-Bicocca, Milano, Piazza della Scienza 3, I-20126 Milano, Italy
³ Istituto di Fisica del Plasma ‘P. Caldirola’, EURATOM-ENEA-CNR Association, Via Cozzi 53, I-20125 Milano, Italy
⁴ Institute of Plasma Physics, Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, People's Republic of China

Funds: This work was supported by National Key Research and Development Program of China (Nos. 2016YY0200805 and 2017YFF0206205), Major Program of National Natural Science Foundation of China (No. 11790324), and National Magnetic Confinement Fusion Science Program of China (Nos. 2013GB106004 and 2012GB101003).

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Received Date: December 30, 2019
Revised Date: May 12, 2020
Accepted Date: May 18, 2020

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Abstract

Abstract

The time-of-flight enhanced diagnostics (TOFED) neutron spectrometer has been installed in TOFED house, which is a newly-built neutron diagnostic lab outside the EAST experimental hall. The line of sight (LOS) of TOFED is defined by the collimator going through the 150 cm biological shielding wall, which can reduce background neutrons very effectively for the neutron spectral measurements. The Monte Carlo code MCNP5 is used in the simulations to characterize collimation effects and the radiation safety of the new house. The collimator makes neutron flux almost fully perpendicular to S1 detectors. In addition, the proportion of scattered neutrons in the LOS of the TOFED is obtained for the measured spectral data interpretation. The simulation results show that the TOFED house satisfies the requirement for the TOFED operations at EAST and gives a safe environment for personnel access during the EAST operation.
- EAST,
- TOFED,
- scattered components,
- shielding efficiency

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References (24)

References

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Simulations of scattered neutrons for the time-of-flight enhanced diagnostics (TOFED) neutron spectrometer on EAST