| DOI: | 10.2172/1057032
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| 报告号: | PPPL-4815
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| 报告题名: | Gyrokinetic Studies of the Effect of Beta on Drift-wave Stability in NCSX |
| 作者: | Baumgaertel, J. A.; Hammett, G. W.; Mikkelsen, D. R.; Nunami, M.; Xanthopoulos, P.
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| 出版年: | 2012
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| 发表日期: | 2012-09-25
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| 国家: | 美国
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| 语种: | 英语
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| 英文关键词: | Drift Instability Stellarators
; Turbulence
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| 中文主题词: | 湍流/气流
; 湍流
; 密度
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| 主题词: | TURBULENCE
; DENSITY
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| 英文摘要: | The gyrokinetic turbulence code GS2 was used to investigate the effects of plasma β on linear, collisionless ion temperature gradient (ITG) modes and trapped electron modes (TEM) in National Compact Stellarator Experiment (NCSX) geometry. Plasma β affects stability in two ways: through the equilibrium and through magnetic fluctuations. The first was studied here by comparing ITG and TEM stability in two NCSX equilibria of differing β values, revealing that the high β equilibrium was marginally more stable than the low β equilibrium in the adiabatic-electron ITG mode case. However, the high β case had a lower kinetic-electron ITG mode critical gradient. Electrostatic and electromagnetic ITG and TEM mode growth rate dependencies on temperature gradient and density gradient were qualitatively similar. The second β effect is demonstrated via electromagnetic ITG growth rates' dependency on GS2's β input parameter. A linear benchmark with gyrokinetic codes GENE and GKV-X is also presented. |
| URL: | http://www.osti.gov/scitech/servlets/purl/1057032
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| Citation statistics: |
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| 资源类型: | 研究报告
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/40860
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| Appears in Collections: | 过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响
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| 1057032.pdf（848KB） | 研究报告 | -- | 开放获取 | | View
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| Recommended Citation: | |
Baumgaertel, J. A.,Hammett, G. W.,Mikkelsen, D. R.,et al. Gyrokinetic Studies of the Effect of Beta on Drift-wave Stability in NCSX. 2012-01-01.
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