BORAY-3D：用于三维磁化等离子体位形的射线追踪代码
BORAY-3D: A ray tracing code for three-dimensional magnetized plasma configurations
浏览论文内容
中文总结 AI 辅助
BORAY-3D是整合宽频段覆盖、任意三维磁等离子体位形处理及完全相对论EC吸收的射线追踪代码，经多基准测试验证，可用于多种等离子体波相关研究。
中文摘要 AI 辅助
射线追踪代码是利用几何光学近似研究电磁波传播与吸收的实用工具。现有代码通常要么在轴对称平衡位形下提供宽射频覆盖范围，要么具备专门针对电子回旋（EC）应用的三维能力。BORAY-3D在单一版本中整合了三项理想特性：其一，其有效频率范围覆盖从离子回旋波、螺旋波、低杂波到EC波及辐射的宽频段；其二，它对任意二维和三维磁等离子体位形采用统一处理方式，包含闭合和开放磁力线区域；其三，它融入了完全相对论麦克斯韦EC吸收机制。该代码通过在柱坐标$(r,\theta,z)$中求解射线方程，同时允许环向模数$n_\theta$变化，扩展了轴对称BORAY公式。磁场、密度和温度数据直接以$(r,\theta,z)$坐标描述，不受通量函数限制，因此可同等处理数值平衡位形和解析场模型。从BORAY继承的非相对论热等离子体模型用于低杂波、离子回旋波和螺旋波吸收，而相对论模型则与互易辐射传输耦合，用于电子回旋辐射（ECE）。实际应用包括13.56 MHz螺旋波、50 MHz快波、3.7 GHz低杂波，以及115–220 GHz EC辐射。BORAY-3D已针对托卡马克环向场纹波与GENRAY进行系统基准测试，针对W7-X与Raytrax、TRAVIS进行系统基准测试，还针对公开的HSX加热和W7-X ECE结果进行了验证。
英文摘要
Ray tracing codes are useful tools for studying electromagnetic wave propagation and absorption using the geometrical-optics approximation. Existing codes commonly provide either broad radio-frequency coverage in axisymmetric equilibria or three-dimensional capability specialized for electron-cyclotron (EC) applications. BORAY-3D integrates three desirable features in a single version. First, it has a broad frequency range of validity regime from ion-cyclotron, helicon and lower-hybrid waves to EC waves and emission. Second, it provides a unified treatment of arbitrary two- and three-dimensional magnetic-plasma configurations, including both closed and open field-line regions. Third, it incorporates fully relativistic Maxwellian EC absorption. The code extends the axisymmetric BORAY formulation by solving the ray equations in cylindrical coordinates $(r,ϕ,z)$ while allowing the toroidal mode number $n_ϕ$ to vary. Magnetic-field, density and temperature data are directly described in $(r,ϕ,z)$ coordinates without the restriction of flux functions, so that numerical equilibria and analytic field models can be handled in the same form. The non-relativistic hot-plasma model inherited from BORAY is used for lower-hybrid, ion-cyclotron and helicon absorption, whereas the relativistic model is coupled to reciprocal radiative transfer for electron cyclotron emission (ECE). Practical applications include 13.56 MHz helicon and 50 MHz fast waves, a 3.7 GHz lower-hybrid wave, and 115--220 GHz EC emission. BORAY-3D has been systematically benchmarked against GENRAY for tokamak toroidal-field ripple, Raytrax and TRAVIS for W7-X, as well as public HSX heating and W7-X ECE results.
