WEKO3
アイテム
Possibility study of the partial neutron calibration for neutron flux monitors in torus devices
https://repo.qst.go.jp/records/77694
https://repo.qst.go.jp/records/776941d09b15e-c94d-40d7-a5b7-65d85c7fa5b7
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-11-28 | |||||
| タイトル | ||||||
| タイトル | Possibility study of the partial neutron calibration for neutron flux monitors in torus devices | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Nishitani, Takeo
× Nishitani, Takeo× Ogawa, Kunihiro× Isobe, Mitsutaka× Pu, Neng× Shinohara, Koji× Ishikawa, Masao× Krasilnikov, Vitaly× Osakabe, Masaki× Koji, Shinohara× Masao, Ishikawa |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The absolute calibration of the detection efficiency for the total neutron yield in the whole plasma is one of the most important issues in the neutron diagnostics such as a neutron flux monitor (NFM). The possibility of a partial neutron calibration is investigated based on the in-situ neutron calibration data of the Large Helical Device (LHD), JT-60U, and other tokamaks. In the case of NFM using a 235U fission chamber located outside of the vacuum vessel on the equatorial plane, more than 90% of the detector counts are contributed by neutrons in the toroidal angle range of −60° to +60°. The detection efficiency for the neutron source located at one toroidal position on the magnetic axis (called point efficiency) decreased exponentially with the absolute toroidal angle of the neutron source. We found that a partial calibration in the toroidal angle range of −60° to +60° combined with exponential extrapolations to -180° and +180°can estimate total detection efficiency within 5% uncertainty. In the case of point efficiency measurement at the limited number of the toroidal locations, the total detection efficiency for the whole plasma can be estimated within 4% uncertainty with the assistance of the MCNP simulation. | |||||
| 書誌情報 |
Fusion Engineering and Design 巻 146, 号 A, p. 50-54, 発行日 2019-09 |
|||||
| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0920-3796 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.fusengdes.2018.11.026 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.sciencedirect.com/science/article/pii/S0920379618307348#! | |||||
