Relationship Between Onset Thresholds, Trigger Types, and Rotation Shear for the m/n=2/1 Neoclassical Tearing Mode in a High-β Spherical Torus | |
Gerhardt, S. P. ; Brennan, D. P. ; Buttery, R. ; La Haye, R. J. ; Sabbagh, S. ; Strait, E. ; Bell, M. ; Bell, R. ; Fredrickson, E. ; Gates, D. ; LeBlanc, B. ; Menard, J. ; Stutman, D. ; Tritz, K. ; Yuh, H. | |
关键词: EDGE LOCALIZED MODES; ROTATION; SHEAR Spherical Torus; MHD; | |
DOI : 10.2172/950773 RP-ID : PPPL-4386 PID : OSTI ID: 950773 Others : TRN: US0902345 |
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学科分类:原子、分子光学和等离子物理 | |
美国|英语 | |
来源: SciTech Connect | |
【 摘 要 】
The onset conditions for the m/n=2/1 neoclassical tearing mode (NTM) are studied in terms of neoclassical drive, triggering instabilities, and toroidal rotation or rotation shear, in the spherical torus NSTX [M. Ono, et al., Nuclear Fusion 40, 557 (2000)]. There are three typical onset conditions for these modes, given in order of increasing neoclassical drive required for mode onset: triggering by energetic particle modes, triggering by edge localized modes, and cases where the modes appear to grow without a trigger. In all cases, the required drive increases with toroidal rotation shear, implying a stabilizing effect from the shear.
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