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Numerical study of impurity transport using the code GT5D
https://repo.qst.go.jp/records/66928
https://repo.qst.go.jp/records/66928553b3c86-88ed-4915-82e9-4da123db98cc
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2018-09-25 | |||||
| タイトル | ||||||
| タイトル | Numerical study of impurity transport using the code GT5D | |||||
| 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 |
Obrejan, Kevin
× Obrejan, Kevin× 井戸村, 泰宏× 本多, 充× 井戸村 泰宏× 本多 充 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The use of tungsten to coat divertors or other plasma facing components, as will be the case for ITER, inevitably leads to the pollution of the fusion plasma by heavy and highly charged impurities. Several tokamaks (ASDEX Upgrade, JET) have reported on-axis accumulation of tungsten - which would be detrimental to fusion efficiency - and its exhaust by electron heating. This kind of neoclassical and turbulent transport of high-Z impurities is not yet fully understood. To treat high-Z impurities, the gyrokinetic full-f Eulerian simulation code GT5D was recently upgraded with an implicit collision solver based on a multi-species linear Fokker-Plank collision operator [Sugama, POP09], and a prior neoclassical benchmark for bulk ions between GT5D [Idomura, JCP16] and the Hirschman-Sigmar (HS) theory [Hirshiman, NF81] was extended to tungsten, further into the Pfirsch-Schluter (PS) transport regime. While a standard low order approximation of the HS theory [Kikuchi, PPCF95] showed a good agreement in the case of small temperature gradients, the cases of steep temperature profiles gave large differences. Instead, under such conditions, we tested an improved HS theory [Honda, POP14], that takes into account higher order flows to more accurately recover the friction coefficients in the PS regime, showing good agreement with GT5D. | |||||
| 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 | プラズマシミュレータシンポジウム2018 | |||||
| 発表年月日 | ||||||
| 日付 | 2018-09-14 | |||||
| 日付タイプ | Issued | |||||
