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Optimization of JET-DT and ITER Operation by Developing an Understanding of the Role of Low- Z Impurity on the H-Mode Pedestal
https://repo.qst.go.jp/records/67114
https://repo.qst.go.jp/records/671143d60f21a-c12f-4c95-8957-c9bb114d9bec
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-01-29 | |||||
| タイトル | ||||||
| タイトル | Optimization of JET-DT and ITER Operation by Developing an Understanding of the Role of Low- Z Impurity on the H-Mode Pedestal | |||||
| 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 |
Giroud, C.
× Giroud, C.× 相羽, 信行× Chankin, A.× Hatch, D.× Kotschenreuther, M.× Moulton, D.× Parisi, J.× Parra, F.× Buller, S.× Challis, C.× Harrison, J.× Hillesheim, J.× Horvath, L.× Kim, H-T.× Frigione, D.× Lomanowski, B.× Militello, F.× Pamela, S.× Pusztai, I.× Refy, D.× Saarelma, S.× Stavrou, C.× Tal, B.× Barnes, M.× Belonohy, E.× Brezinsek, S.× Bowman, C.× Delabie, E.× Field, A.× Fontdecaba, J.× Huber, A.× Meigs, A.× Menmuir, S.× Simpson, J.× 相羽 信行 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Robust predictions for the pedestal height in ITER require an understanding of the role of D-gas and impurity injection, such as N and Ne, on the pedestal temperature and density in JET-ILW both in terms of loss of pedestal pressure and/or temperature (with D-gas and Ne) as well as its improvement (with N or C). On JET-ILW, seeding Ne can result in either a decrease or increase on the pedestal density depending on pedestal collisionality and beta_N, but in all cases seeding Ne does not lead to an increase of temperature, unlike with C. Seeding C2D4 counteracts the electron temperature and density degradation of a high D-gas rate injection. The maximum normalised pressure gradient in the pedestal of the low and high-beta_N plasmas is within 20% of the critical normalised pressure gradient calculated a linear MHD code taking the effect of the ion diamagnetic effect and rotation on the stability. ETG instability is identified to be the dominant energy loss mechanism for the low and high-beta_N plasmas but can also drive instabilities in the ion scale level. | |||||
| 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 | 27th IAEA Fusion Energy Conference | |||||
| 発表年月日 | ||||||
| 日付 | 2018-10-24 | |||||
| 日付タイプ | Issued | |||||
