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Simulation Study of the Divertor Operation for a DEMO Fusion Reactor
https://repo.qst.go.jp/records/72854
https://repo.qst.go.jp/records/728547a55a36f-ee68-4084-993e-83cb1d0d31bd
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-07-05 | |||||
| タイトル | ||||||
| タイトル | Simulation Study of the Divertor Operation for a DEMO Fusion Reactor | |||||
| 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 |
Asakura, Nobuyuki
× Asakura, Nobuyuki× Hoshino, Kazuo× Homma, Yuuki× Tokunaga, Shinsuke× Joint Special Design Team for Fusion DEMO, the× Asakura, Nobuyuki× Homma, Yuuki× Tokunaga, Shinsuke |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Power handling in the divertor has been investigated for Japan DEMO concept. System code suggests the plasma line-av. ne (8.6x1019m-3~1.2nGW) lower than ITER. Plasma detachment in the low nesep (ne/3) = 2-3x1019m-3 has been investigated. Appropriate divertor size, i.e. larger than ITER-size leg, has been investigated. Divertor size will affect sizes of vacuum vessel, toroidal field coil and maintenance port as well as its cost. Divertor performance with leg length (Ldiv) of 1.6m was investigated in low SOL density (nesep = 1.5-2.4x10m-3), using SONIC with Ar seeding, Pout = 250MW (Psep= 235-240MW), high radiation fraction of 0.8 and fixed diffusion coefficients. High plasma temperature at SOL (Tesep = 300-600eV): local decay length of the parallel heat flux profile is 2.6-2.8 mm near the separatrix due to electron flux limiter, which is smaller than ITER simulation (3.6 mm, Tesep ~200 eV). Peak heat load at the dovertor target was reduced from 12 to ~5 MWm-2 with increasing separatrix density (nesep). nesep >2.2x1019m-3 was required to reduce Tediv to ~25 eV at the attached region of the outer target, and to reduce nAr/ne in SOL to ~0.5%. “Detachment plasma (~1eV)” was produced near the separatrix for both Ldiv = 1.1m and 1.6m cases, while higher Te and Ti at attached plasma area for the shorter case. Ar concentration in SOL was larger (~3%) for the short Ldiv = 1.1m case. |
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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 23rd International Conference on Plasma Surface Interactions in Controlled Fusion Devices (PSI-23) | |||||
| 発表年月日 | ||||||
| 日付 | 2018-06-18 | |||||
| 日付タイプ | Issued | |||||
