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Dust Generation in Tokamaks: Overview of Beryllium and Tungsten Dust Studies in JET with the ITER-Like Wall
https://repo.qst.go.jp/records/72774
https://repo.qst.go.jp/records/727744b81598f-d09c-4604-a140-5f6452d9348c
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-05-02 | |||||
| タイトル | ||||||
| タイトル | Dust Generation in Tokamaks: Overview of Beryllium and Tungsten Dust Studies in JET with the ITER-Like Wall | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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 |
Rubel, M.
× Rubel, M.× Widdowson, A.× Grzonka, J.× Moon, Sunwoo× Petersson, P.× Fortuna-Zaleśna, E.× Baron-Wiechec, A.× Ashikawa, N.× Asakura, Nobuyuki× Hatano, Y.× Isobe, Kanetsugu× Kurotaki, Hironori× Masuzaki, S.× Oya, Y.× Oyaizu, Makoto× Tokitani, M.× Contributors, JET× 朝倉 伸幸× 磯部 兼嗣× 黒滝 宏紀× 小柳津 誠 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Operation of the JET tokamak with beryllium and tungsten ITER-like wall provides unique opportunity for detailed studies on dust generation: quantity, morphology, location, etc. The programme carried out in response to ITER needs for safety assessment comprises: (i) remotely controlled vacuum cleaning of the divertor; (ii) local sampling of loosely bound matter from plasma-facing components (PFC); (iii) collection of mobilized dust on various erosion-deposition probes located in the divertor and in the main chamber. Results of comprehensive analyses performed by a number of complementary techniques, e.g. a range of microscopy methods, electron and ion spectroscopy, liquid scintillography and thermal desorption, are summarized by following points: (a) Total amount of dust collected by vacuum cleaning after three campaigns is about 1–1.4 g per campaign (19.1–23.5 h plasma operation), i.e. over 100 times smaller than in JET operated with carbon walls (i.e. in JETC). (b) Two major categories of Be dust are identified: flakes of co-deposits formed on PFC and droplets (2–10 μm in diameter). Small quantifies, below 1 g, of Be droplets and splashes are associated mainly with melting of beryllium limiters. (c) Tungsten dust occurs mainly as partly molten flakes originating from the W-coated tiles. |
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| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | The 13the International Symposium on Fusion Nuclear Technology(ISFNT-13) | |||||
| 発表年月日 | ||||||
| 日付 | 2017-09-26 | |||||
| 日付タイプ | Issued | |||||
