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Simulations of scattered neutrons for the time-of-flight enhanced diagnostics (TOFED) neutron spectrometer on EAST
Plasma Science and Technology ( IF 1.7 ) Pub Date : 2020-07-08 , DOI: 10.1088/2058-6272/ab9529
Jiaqi SUN 1 , Zhimeng HU 1, 2 , Lijian GE 1 , Yimo ZHANG 1 , Tengfei DU 1 , Xingyu PENG 1 , Zhongjing CHEN 1 , Xing ZHANG 1 , Giuseppe GORINI 2, 3 , Massimo NOCENTE 2, 3 , Marco TARDOCCHI 3 , Liqun HU 4 , Guoqiang ZHONG 4 , Baonian WAN 4 , Xiangqing LI 1 , Tieshuan FAN 1
Affiliation  

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.

中文翻译:

EAST飞行时间增强诊断(TOFED)中子光谱仪的散射中子模拟

飞行时间增强诊断(TOFED)中子光谱仪已安装在TOFED房屋中,该房屋是EAST实验大厅外的新建中子诊断实验室。TOFED的视线(LOS)由准直器穿过150厘米的生物屏蔽壁确定,这可以非常有效地减少背景中子,以进行中子光谱测量。仿真中使用了蒙特卡洛代码MCNP5来表征准直效果和新房子的辐射安全性。准直器使中子通量几乎完全垂直于S1检测器。另外,获得了TOFED LOS中散射中子的比例,用于测量光谱数据。
更新日期:2020-07-09
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