Gyrokinetic turbulence simulations at high plasma beta
Gyrokinetic turbulence simulations at high plasma beta
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DOI：
10.1063/1.3005380
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发表时间：
2008-10
影响因子：
2.2
通讯作者：
M. Pueschel;Matthias Kammerer;F. Jenko
中科院分区：
文献类型：
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作者：
M. Pueschel;Matthias Kammerer;F. Jenko
采用气旋基本情形参数对β值高于或超过动能气球阈值的电磁陀螺动力湍流进行了数值模拟。湍流输运的β标度被发现与线性和非线性效应的复杂相互作用有关。详细地进行了动力学气球模式的线性研究，而非线性研究发现，它只在β值仅略低于各自的理想极限的相当窄的范围内主导湍流。磁输运尺度类似于β2，并可用雷切斯特-罗森布鲁斯类型的β很好地描述。采用气旋基本情形参数对电磁陀螺动力学湍流进行了数值模拟，其数值范围为气球动力学阈值以上。湍流输运的β标度被发现与线性和非线性效应的复杂相互作用有关。详细地进行了动力学气球模式的线性研究，而非线性研究发现，它只在β值仅略低于各自的理想极限的相当窄的范围内主导湍流。磁输运的尺度与β2相似，并可用雷切斯特-罗森布鲁斯类型的ANSATZ描述。
Electromagnetic gyrokinetic turbulence simulations employing Cyclone Base Case parameters are presented for β values up to and beyond the kinetic ballooning threshold. The β scaling of the turbulent transport is found to be linked to a complex interplay of linear and nonlinear effects. Linear investigation of the kinetic ballooning mode is performed in detail, while nonlinearly, it is found to dominate the turbulence only in a fairly narrow range of β values just below the respective ideal limit. The magnetic transport scales like β2 and is well described by a Rechester–Rosenbluth-type ansatz.Electromagnetic gyrokinetic turbulence simulations employing Cyclone Base Case parameters are presented for β values up to and beyond the kinetic ballooning threshold. The β scaling of the turbulent transport is found to be linked to a complex interplay of linear and nonlinear effects. Linear investigation of the kinetic ballooning mode is performed in detail, while nonlinearly, it is found to dominate the turbulence only in a fairly narrow range of β values just below the respective ideal limit. The magnetic transport scales like β2 and is well described by a Rechester–Rosenbluth-type ansatz.