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Fourier spectra of the magnetic field strength |B| in the Hamada coordinates are employed for the calculation. The appearance of the local maxima of poloidal viscosity as a function of poloidal flow velocity greatly depend on the relative amplitudes between the toroidicity and helicities in the magnetic field. Effects of magnetic configuration control such as the inward magnetic axis shift and quadrupole field control on the poloidal viscosity are investigated in the Large Helical Device (LHD)-1ike L = 2 heliotron. Finite beta effects are also briefly studied based on the fixed boundary magnetohydrodynamic (MHD) equilibria. Due to the well suppressed non-symmetric magnetic spectra in the Boozer coordinates for QS configurations, QS properties are well maintained even in the Hamada coordinates. 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Nonlinear Incompressible Poloidal Viscosity in L=2 Heliotron and Quasi-Symmetric Stellarators
http://hdl.handle.net/10655/2572
http://hdl.handle.net/10655/257240737425-2e10-4aca-8110-19ea1da81f8c
Item type | 研究報告書 / Research Paper(1) | |||||
---|---|---|---|---|---|---|
公開日 | 2010-02-05 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Nonlinear Incompressible Poloidal Viscosity in L=2 Heliotron and Quasi-Symmetric Stellarators | |||||
言語 | ||||||
言語 | eng | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | nonlinear incompressible poloidal viscosity | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | L = 2 heliotron | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | quasi-symmetric stellarators | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Boozer coordinates | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | Hamada coordinates | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | helicity induced local maximum (HM) | |||||
キーワード | ||||||
言語 | en | |||||
主題Scheme | Other | |||||
主題 | toroidicity induced local maximum (TM) | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_18ws | |||||
資源タイプ | research report | |||||
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 |
"Yokoyama, M.
× "Yokoyama, M.× Nakajima, N.× Okamoto, M." |
|||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | "The possibility of occurence of the L-H transition is examined in L = 2 heliotron and quasi-symmetric (QS) stellarators based on the nonlinear incompressible poloidal viscosity for the plateau to Pfirsch-Schluter regime. Fourier spectra of the magnetic field strength |B| in the Hamada coordinates are employed for the calculation. The appearance of the local maxima of poloidal viscosity as a function of poloidal flow velocity greatly depend on the relative amplitudes between the toroidicity and helicities in the magnetic field. Effects of magnetic configuration control such as the inward magnetic axis shift and quadrupole field control on the poloidal viscosity are investigated in the Large Helical Device (LHD)-1ike L = 2 heliotron. Finite beta effects are also briefly studied based on the fixed boundary magnetohydrodynamic (MHD) equilibria. Due to the well suppressed non-symmetric magnetic spectra in the Boozer coordinates for QS configurations, QS properties are well maintained even in the Hamada coordinates. Therefore, the single clear local maximum can be obtained for QS configurations." | |||||
書誌情報 |
en : Research Report NIFS-Series 発行日 1997-11-01 |
|||||
報告書番号 | ||||||
NIFS-519 | ||||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 0915-633X |