The CQL3D Fokker-Planck code
The CQL3D Fokker-Planck code
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发表时间：
1992-11
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通讯作者：
R. W. Harvey;M. McCoy
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作者：
R. W. Harvey;M. McCoy
CQL3D是用于模拟托卡马克辅助加热的通用计算机代码。它计算了二维动量空间反射平均、离子和电子分布函数在环形几何中的径向分布，与rf和/或中性束注入功率的沉积和扩散径向输运模型相一致。这个计算是用一组在非圆形磁通表面上运行的反射平均Fokker-Planck （FP）求解器进行的，得到了稳态的环形平均分布，这是由碰撞、直流电场、rf准线性扩散、同步辐射、中性束注入和径向扩散之间的平衡造成的。CQL3D与电子回旋加速器，低混合和快速波的射线追踪代码，中性束沉积代码和非圆平衡代码相耦合。我们描述了代码，提供了计算每个组成进程的FP系数的表达式和方法，并给出了基准应用程序以验证代码的主要组件。
CQL3D is a general purpose computer code for modeling auxiliary heating in tokamaks. It calculates the radial distribution of 2D in momentum-space bounce-averaged, ion and electron distribution functions in toroidal geometry, consistent with deposition of rf and/or neutral beam injected power and a diffusive radial transport model. This calculation is carried out with an array of bounce-averaged Fokker-Planck (FP) solvers running on noncircular magnetic flux surfaces, giving the steady-state, toroidally-averaged distribution resulting from a balance between collisions, dc electric field, rf quasilinear diffusion, synchrotron radiation, neutral beam injection, and radial diffusion. CQL3D is coupled to ray-tracing codes for electron cyclotron, lower hybrid, and fast waves, to a neutral beam deposition code, and to a noncircular equilibrium code. We describe the code, providing expressions and methodology for calculation of the FP coefficients from each of the constituent processes, and give benchmark applications in order to validate the major components of the code.