Gyrokinetic Studies of the Effect of Beta on Drift-wave Stability in NCSX

doi:10.2172/1057032

GSTDTAP > 地球科学

DOI	10.2172/1057032
报告编号	PPPL-4815
来源ID	OSTI ID: 1057032
	Gyrokinetic Studies of the Effect of Beta on Drift-wave Stability in NCSX
	Baumgaertel, J. A.; Hammett, G. W.; Mikkelsen, D. R.; Nunami, M.; Xanthopoulos, P.
	2012-09-25
出版年	2012
语种	英语
国家	美国
出版者	Physics of Plasmas (September 2012)
领域	地球科学
英文摘要	The gyrokinetic turbulence code GS2 was used to investigate the effects of plasma Î˛ on linear, collisionless ion temperature gradient (ITG) modes and trapped electron modes (TEM) in National Compact Stellarator Experiment (NCSX) geometry. Plasma Î˛ 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 Î˛ values, revealing that the high Î˛ equilibrium was marginally more stable than the low Î˛ equilibrium in the adiabatic-electron ITG mode case. However, the high Î˛ 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 Î˛ effect is demonstrated via electromagnetic ITG growth rates' dependency on GS2's Î˛ input parameter. A linear benchmark with gyrokinetic codes GENE and GKV-X is also presented.
英文关键词	Drift Instability Stellarators Turbulence
URL	查看原文
来源平台	US Department of Energy (DOE)
引用统计
文献类型	科技报告
条目标识符	http://119.78.100.173/C666/handle/2XK7JSWQ/5729
专题	地球科学
推荐引用方式 GB/T 7714	Baumgaertel, J. A.,Hammett, G. W.,Mikkelsen, D. R.,et al. Gyrokinetic Studies of the Effect of Beta on Drift-wave Stability in NCSX:Physics of Plasmas (September 2012),2012.