标题： NCSX中β对漂移波稳定性的影响的gyrokinetic研究 显示英文标题

标题： Gyrokinetic studies of the effect of beta on drift-wave stability in NCSX

摘要： 使用磁流体湍流代码GS2研究了等离子体β对国家紧凑 stellarator 实验（NCSX）几何中线性、无碰撞离子温度梯度（ITG）模式和捕获电子模式（TEM）的影响。 等离子体β通过平衡和磁波动影响稳定性。 这里通过比较两种不同β值的NCSX平衡中的ITG和TEM稳定性，研究了第一种影响，结果表明在绝热电子ITG模式的情况下，高β平衡比低β平衡略微更稳定。 然而，高β情况下，动能电子ITG模式的临界梯度较低。 静电和电磁ITG和TEM模式的增长率与温度梯度和密度梯度的依赖关系是定性相似的。 第二种β效应通过电磁ITG增长速率对GS2的β输入参数的依赖性进行了演示。 还进行了与磁流体动力学代码GENE和GKV-X的线性基准测试。 显示英文摘要

摘要： The gyrokinetic turbulence code GS2 was used to investigate the effects of plasma beta on linear, collisionless ion temperature gradient (ITG) modes and trapped electron modes (TEM) in National Compact Stellarator Experiment (NCSX) geometry. Plasma beta 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 beta values, revealing that the high beta equilibrium was marginally more stable than the low beta equilibrium in the adiabatic-electron ITG mode case. However, the high beta 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 beta effect is demonstrated via electromagnetic ITG growth rates' dependency on GS2's beta input parameter. A linear benchmark with gyrokinetic codes GENE and GKV-X is also presented.