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Numerical diagnostics of fluctuation spectrum in 3D magnetic configurations
https://repo.qst.go.jp/records/49480
https://repo.qst.go.jp/records/494801e8cf12a-f45d-427c-98e4-c62f1be022da
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-01-21 | |||||
| タイトル | ||||||
| タイトル | Numerical diagnostics of fluctuation spectrum in 3D magnetic configurations | |||||
| 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_6501 | |||||
| 資源タイプ | journal article | |||||
| 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 |
Kasuya, N.
× Kasuya, N.× Nunami, M.× Tanaka, K.× 矢木, 雅敏× 矢木 雅敏 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Numerical diagnostics using 3D simulation data are carried out to capture fluctuation properties in helical plasmas. Here, ion-temperature-gradient (ITG) turbulence data are used and obtained by the gyrokinetic code, GKV-X, with realistic magnetic configuration. Fluctuations are calculated in the field aligned coordinates, which have long wave lengths in the magnetic field direction and are anisotropic in the radial and poloidal directions; their features are represented in the experimental frame. For the validation, the density fluctuation spectrum is calculated, which is integrated along the line of sight as in the phase contrast imaging signals. From that integrated signal, its vertical profile is reconstructed by utilizing the variation of the direction of the magnetic field, as the operation carried out in experimental data. In experiments, there usually exists a limitation on the observation region and spatial resolution, so differences between the deteriorated and real spectra is confirmed by numerical simulations with variations related to spatial limitations. ITG modes have a characteristic wavelength and frequency, and are identified with sufficient spatial resolution even from the integrated signal by comparing the wavemunber spectra at different radial positions. Combination of multiple flux-tube data is also tested for calculation to give fluctuations spreading in wider radial ranges of plasma. These fluctuation spectra are compared with the experimental one for comprehensive understanding of experimental observations. | |||||
| 書誌情報 |
Nuclear Fusion 巻 58, 号 10, p. 106033, 発行日 2018-08 |
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| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1088/1741-4326/aad784 | |||||
