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Gyrokinetic modeling issues of edge plasma
https://repo.qst.go.jp/records/73258
https://repo.qst.go.jp/records/73258cbf213b4-2863-4710-9894-f0bd607bf780
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2016-07-12 | |||||
| タイトル | ||||||
| タイトル | Gyrokinetic modeling issues of edge plasma | |||||
| 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 |
宮戸, 直亮
× 宮戸, 直亮× 宮戸 直亮 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Tokamak edge turbulence plays an important role in determining fluxes towards a tokamak diverter which are critical for realization of fusion power stations. In particular, understanding the transition from a low confinement state (L-mode) to a high confinement state (H-mode) is one of critical issues. The gyrokinetic/gyrofluid models are the most sophisticated models for turbulence studies in magnetized plasmas, but the L-H transition has not been reproduced by the gyrokinetic/gyrofluid simulations so far. In the first place, the standard gyrokinetic model does not consider a fast flow (strong electric field) observed in H-mode plasmas and its applicability to edge plasmas is unclear. We have derived a guiding-center Lagrangian considering the fast flow. It is suitable for the L-H transition simulation because, in contrast to the conventional models for flowing plasmas, its symplectic part does not include a flow term as in the standard model. Its Hamiltonian has high-order flow terms including a cubic nonlinear term beyond the standard model in which a quadratic term is included. Measurements from a turbulence simulation with conventional tokamak L-mode edge parameters indicate that effects of the cubic nonlinear term are small and keeping the quadratic nonlinear term seems to be sufficient for tokamak edge simulations in a certain parameter regime. | |||||
| 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 | 18th International Congress on Plasma Physics | |||||
| 発表年月日 | ||||||
| 日付 | 2016-06-28 | |||||
| 日付タイプ | Issued | |||||
