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Analysis of the outer divertor hot spot activity in the protection video camera recordings at JET
https://repo.qst.go.jp/records/74863
https://repo.qst.go.jp/records/74863dc220a62-4a8f-4bc3-b596-50c0db2734ef
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-03-19 | |||||
| タイトル | ||||||
| タイトル | Analysis of the outer divertor hot spot activity in the protection video camera recordings at JET | |||||
| 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 |
A.Drenik
× A.Drenik× S.Brezinsek× P.Carvalho× V.Huber× N.Osterman× G.F.Matthews× M.Nemec× Aiba, Nobuyuki× Uto, Hiroyasu× Imazawa, Ryota× Hoshino, Kazuo× Kamiya, Kensaku× Miyoshi, Yuuya× Asakura, Nobuyuki× Nakano, Tomohide× Ogawa, Toshihide× Suzuki, Takahiro× Tojo, Hiroshi× Urano, Hajime× Nobuyuki, Aiba× Hiroyasu, Uto× Ryota, Imazawa× Kazuo, Hoshino× Kensaku, Kamiya× Yuuya, Miyoshi× Nobuyuki, Asakura× Tomohide, Nakano× Toshihide, Ogawa× Takahiro, Suzuki× Hiroshi, Tojo× Hajime, Urano |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Hot spots on the divertor tiles at JET result in overestimation of the tile surface temperature which causes unnecessary termination of pulses. However, the appearance of hot spots can also indicate the condition of the divertor tile surfaces. To analyse the behaviour of the hot spots in the outer divertor tiles of JET, a simple image processing algorithm is developed. The algorithm isolates areas of bright pixels in the camera image and compares them to previously identified hot spots. The activity of the hot spots is then linked to values of other signals and parameters in the same time intervals. The operation of the detection algorithm was studied in a limited pulse range with high hot spot activity on the divertor tiles 5, 6 and 7. This allowed us to optimise the values of the controlling parameters. Then, the wider applicability of the method has been demonstrated by the analysis of the hot spot behaviour in a whole experimental campaign. | |||||
| 書誌情報 |
FUSION ENGINEERING AND DESIGN 巻 139, p. 115-123, 発行日 2019-02 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.fusengdes.2018.12.079 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.sciencedirect.com/science/article/pii/S0920379618308408 | |||||
