A model is proposed which accounts for the modification in the electron cyclotron (EC) resonance condition for Gaussian beams injected in inhomogeneous plasmas, due to the finite width of the transversal spectrum caused by the paraxial character of the beams, within the framework of the complex geometrical optics. The resonance modification due to the non-uniformity of the equilibrium magnetic field is taken into account as well. This model, which is suitable for electron cyclotron resonance heating and current drive applications, has been implemented as an option in the beam-tracing code GRAY. Numerical examples of the application of this new tool to International Thermonuclear Experimental Reactor scenarios are given, with results that indicate a minor effect of the EC resonance broadening on the EC power deposition profiles for the considered cases.

中文翻译：

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在非均匀等离子体中传播的高斯光束的 EC 共振光谱展宽的数值分析，并应用于 ITER 中的 EC H&CD

提出了一个模型，该模型解释了注入非均匀等离子体的高斯束的电子回旋 (EC) 共振条件的修改，这是由于在复合物框架内由束的近轴特性引起的横向光谱的有限宽度几何光学。由于平衡磁场的不均匀性引起的共振修正也被考虑在内。该模型适用于电子回旋共振加热和电流驱动应用，已作为光束追踪代码 GRAY 中的一个选项实现。给出了将此新工具应用于国际热核实验反应堆场景的数值示例，