| Autor: |
LU Hongwei, NI Zhijiao, ZHA Xuejun |
| Jazyk: |
čínština |
| Rok vydání: |
2021 |
| Předmět: |
|
| Zdroj: |
Fushe yanjiu yu fushe gongyi xuebao, Vol 39, Iss 4, Pp 84-90 (2021) |
| Druh dokumentu: |
article |
| ISSN: |
1000-3436 |
| DOI: |
10.11889/j.1000-3436.2021.rrj.39.040701&lang=zh |
| Popis: |
Attenuation coefficients of γ-rays in stainless steel, lead, and tungsten were calculated theoretically. According to the theoretical calculations, cylindrical lead shielding and a collimator were designed for a high-energy hard X-ray spectrum diagnostic system in the Experimental Advanced Superconducting Tokamak (EAST). The hard X-ray diagnostic system of EAST was introduced in detail, and the diagnostic system was tested through table experiments with radioactive 22Na sources. Attenuation coefficients of γ rays in stainless steel and tungsten were also obtained by fitting γ-ray radiation spectra. The effect of the stainless steel and tungsten materials on the X-ray and γ-ray diagnostic system was evaluated by γ-ray energy spectra. The attenuation coefficients obtained through the experiments were found to agree well with those calculated theoretically considering the error. The influence of stainless steel on low-energy X-ray or γ-ray diagnostics cannot be ignored, while its influence on high-energy X-ray or γ-ray diagnostics can be ignored. The influence of tungsten on X-ray or γ-ray diagnostics cannot be ignored. However, high Z materials such as tungsten and lead should be avoided in front of the collimation hole of the detector to reduce the influence on diagnostic data. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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