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Reduction of the Neutron Induced Noise in the Compact Neutral Particle Analyzer for LHD Deuterium Plasma Experiments
http://hdl.handle.net/10655/00013232
http://hdl.handle.net/10655/0001323200e98393-3b7f-4069-b8ba-2a195207672a
名前 / ファイル | ライセンス | アクション |
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11614_PFR (779.0 kB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-06-17 | |||||
タイトル | ||||||
タイトル | Reduction of the Neutron Induced Noise in the Compact Neutral Particle Analyzer for LHD Deuterium Plasma Experiments | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | CNPA | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | neutral particle | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | LHD | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | NBI | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | neutron | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | neutron noise | |||||
キーワード | ||||||
主題Scheme | Other | |||||
主題 | activation | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | journal article | |||||
著者 |
OZAKI, Tetsuo
× OZAKI, Tetsuo× KAMIO, Shuji× NISHITANI, Takeo× SAITO, Kenji× OGAWA, Kunihiro× ISOBE, Mitsutaka× OSAKABE, Masaki× KOBAYASHI, Makoto× the LHD Group , |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | The compact neutral particle analyzer (CNPA) combined with the impurity pellet measurement is one of the few instruments that can directly measure the radial high energy particle distribution in the Large Helical Device (LHD). For this purpose, it is suitable to set CNPA near LHD. On the other hand, sufficient and heavy shielding against DD-neutrons, generated in deuterium experiment, is required, especially when the deuterium neutral particle beam injection heating is applied. The shield is insufficient due to the weight limitation on the stage. However, if the neutron energy is thermalized on the detector, the neutron noise can be estimated only from the total neutron yield, which is monitored by the 235U fission chamber, etc. In the experiments, the pure neutron noise on the CNPA has been measured by closing the gate-valve to avoid the charge exchange neutral particle signals. The neutron noise on the CNPA has been proportional to the total neutron yield over three-order magnitudes. This means that the neutron noise can be estimated from the total neutron yield. Therefore, the calibrated charge exchange neutral signal can be obtained simply by subtracting the estimated neutron noise from the measured signal in ordinary experiments. | |||||
書誌情報 |
Plasma and Fusion Research 巻 14, 号 Special Issue 2, p. 3402142, 発行日 2019-08-14 |
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書誌的事項 | ||||||
the 27th International Toki Conference (ITC27) & the 13th Asia Pacific Plasma Theory Conference (APPTC2018) | ||||||
出版者 | ||||||
出版者 | The Japan Society of Plasma Science and Nuclear Fusion Research | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 1880-6821 | |||||
書誌レコードID | ||||||
収録物識別子タイプ | NCID | |||||
収録物識別子 | AA12346675 | |||||
DOI | ||||||
関連タイプ | isIdenticalTo | |||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1585/pfr.14.3402142 | |||||
権利 | ||||||
権利情報 | (c) 2019 The Japan Society of Plasma Science and Nuclear Fusion Research | |||||
関連サイト | ||||||
識別子タイプ | DOI | |||||
関連識別子 | https://doi.org/10.1585/pfr.14.3402142 | |||||
関連名称 | Publisher version | |||||
著者版フラグ | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
NAIS | ||||||
11614 |