Experimental examination of a method to estimate temporal effect by neutrons and gamma-rays on scintillation light in scintillator-based soft x-ray diagnostic of experimental advanced superconducting tokamak and large helical device | |
Bando, T.1; Ohdachi, S.2; Zhou, R. J.3; Zhong, G. Q.3; Yuan, Y.3; Hu, L. Q.3; Ling, B. L.3 | |
刊名 | REVIEW OF SCIENTIFIC INSTRUMENTS
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2019 | |
卷号 | 90期号:1页码:7 |
ISSN号 | 0034-6748 |
DOI | 10.1063/1.5054325 |
英文摘要 | Scintillators, which are more tolerant of neutrons or gamma-rays than semiconductors, are a promising candidate for soft X-ray (SX) diagnostics in high neutron flux environments such as JT-60SA or ITER. Although scintillators are tolerant of radiations, neutrons and gamma-rays can cause scintillation light and become noise on SX signals. Therefore, a method to estimate the temporal effect by the radiations on SX signals and an appropriate design of the radiation shield based on the estimation are required. In previous studies, it has been proposed for estimating the effect by the radiations to calculate the absorption powers due to SXs, neutrons, and gamma-rays in scintillators assuming that amplitudes of scintillation light are proportional to the absorption powers. In this study, an experimental examination of this proposal is conducted in the Experimental Advanced Superconducting Tokamak (EAST). It is shown that the proposal may be valid in the examination of EAST. In addition to results in EAST, initial results of a multi- channel scintillator-based SX diagnostic in the Large Helical Device (LHD) are introduced. Although a scintillator-based SX diagnostic in LHD observes oscillations of SXs by magnetohydrodynamic (MHD) phenomena successfully, the observed temporal effect on SX signals by neutrons or gamma-rays is more significant than the expected effect, which is estimated by calculating the absorption powers. One of the possible reasons for the contradiction between the results in EAST and LHD is unexpected gamma-rays around the scintillators in LHD. Although the temporal effect by the radiations is significant in the current system of LHD, the degradation of amplitudes of SX signals after the deuterium plasma experiments is not observed with the current level of the fluence. The scintillator-based SX diagnostic in LHD may work as a diagnostic to research MHD instabilities in deuterium plasma experiments without additional maintenance during an experimental campaign by making the pinhole larger or setting an additional radiation shield. Published under license by AIP Publishing. |
资助项目 | NIFS[ULPP021] ; NIFS[028] ; Ministry of Education, Science, Sports and Culture[26249144] ; JSPS-NRF-NSFC A3 Foresight Program (NSFC)[11261140328] ; JSPS-NRF-NSFC A3 Foresight Program (NRF)[2012K2A2A6000443] ; NIFS/NINS under the project of Formation of International Scientific Base and Network |
WOS关键词 | DESIGN |
WOS研究方向 | Instruments & Instrumentation ; Physics |
语种 | 英语 |
出版者 | AMER INST PHYSICS |
WOS记录号 | WOS:000457411800023 |
资助机构 | NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; 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NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; NIFS ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; Ministry of Education, Science, Sports and Culture ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NSFC) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; JSPS-NRF-NSFC A3 Foresight Program (NRF) ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; NIFS/NINS under the project of Formation of International Scientific Base and Network ; 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内容类型 | 期刊论文 |
源URL | [http://ir.hfcas.ac.cn:8080/handle/334002/41942] ![]() |
专题 | 合肥物质科学研究院_中科院等离子体物理研究所 |
通讯作者 | Bando, T. |
作者单位 | 1.SOKENDAI, 322-6 Oroshi Cho, Toki, Gifu, Japan 2.Natl Inst Nat Sci, Natl Inst Fus Sci, 322-6 Oroshi Cho, Toki, Gifu, Japan 3.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China |
推荐引用方式 GB/T 7714 | Bando, T.,Ohdachi, S.,Zhou, R. J.,et al. Experimental examination of a method to estimate temporal effect by neutrons and gamma-rays on scintillation light in scintillator-based soft x-ray diagnostic of experimental advanced superconducting tokamak and large helical device[J]. REVIEW OF SCIENTIFIC INSTRUMENTS,2019,90(1):7. |
APA | Bando, T..,Ohdachi, S..,Zhou, R. J..,Zhong, G. Q..,Yuan, Y..,...&Ling, B. L..(2019).Experimental examination of a method to estimate temporal effect by neutrons and gamma-rays on scintillation light in scintillator-based soft x-ray diagnostic of experimental advanced superconducting tokamak and large helical device.REVIEW OF SCIENTIFIC INSTRUMENTS,90(1),7. |
MLA | Bando, T.,et al."Experimental examination of a method to estimate temporal effect by neutrons and gamma-rays on scintillation light in scintillator-based soft x-ray diagnostic of experimental advanced superconducting tokamak and large helical device".REVIEW OF SCIENTIFIC INSTRUMENTS 90.1(2019):7. |
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