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On the possible injection schemes with the ITER SPI system
https://repo.qst.go.jp/records/80498
https://repo.qst.go.jp/records/8049837299e4a-f591-417f-bbf9-6cf26d7c5d62
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2020-09-14 | |||||
| タイトル | ||||||
| タイトル | On the possible injection schemes with the ITER SPI system | |||||
| 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 |
Nardon, Eric
× Nardon, Eric× Matsuyama, Akinobu× Lehnen, Michael× Hu, Di× Hoelzl, M.× Bonfiglio, D.× Wieschollek, F.× Matsuyama, Akinobu |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The ITER Shattered Pellet Injection (SPI) system will comprise 24 injectors spread over 3 equatorial ports completed by 3 injectors in 3 upper ports. The idea of using multiple synchronized SPI from equatorial ports in order to maximize the radiated fraction and minimize radiation asymmetries is an obvious example, but will be discussed mainly in other presentations during this meeting. We will instead focus mainly on the Runaway Electron (RE) issue. Avoiding large RE beams in ITER may require increasing the electron density ne by more than one order of magnitude. The best strategy to reach this goal may be to use a 2-step injection. In a first step, pure H or D pellets would be injected. Then, after a delay leaving time for the H or D pellets to reach the plasma core, pellets containing Ne would follow. JOREK 3D non-linear MHD simulations will be presented that suggest that H or D pellets may indeed reach the core before triggering a thermal quench. In case raising ne proves insufficient, an additional method for RE avoidance could consist in repeatedly injecting pellets during the current quench in order to deplete RE seeds before they have substantially avalanched. Estimates will be shown to support this idea and motivate further studies. | |||||
| 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 | IAEA Technical Meeting on Plasma Disruptions and their Mitigation | |||||
| 発表年月日 | ||||||
| 日付 | 2020-07-22 | |||||
| 日付タイプ | Issued | |||||
