UCLA, Los Angeles, California 90095, USA.
General Atomics, San Diego, California 92121, USA.
Rev Sci Instrum. 2023 Jan 1;94(1):013507. doi: 10.1063/5.0129892.
A new tool for the exploration and diagnosis of the internal magnetic field of plasmas in the DIII-D tokamak in the form of a constraint on the EFIT (Equilibrium Fitting) Grad-Shafranov code based on the Faraday-effect Radial Interferometer-Polarimeter (RIP) diagnostic is presented, including description, verification, and sample application. The physics underlying the diagnostic and its implementation into EFIT are discussed, and the results showing the verification of the model are given, and the model's limitations are discussed. The influence of the diagnostic's input on the resulting equilibrium parameters is characterized. The effect of electron density profile refinement is evaluated and found to be negligible. A sample application of the diagnostic is shown, indicating that the RIP constraint has similar effects on the equilibrium as motional Stark effect constraints do.
一种新的工具，用于探索和诊断 DIII-D 托卡马克等离子体内的磁场，其形式为基于法拉第效应径向干涉仪-偏振计（RIP）诊断对 EFIT（平衡拟合） Grad-Shafranov 代码的约束，包括描述、验证和示例应用。讨论了诊断的物理基础及其在 EFIT 中的实现，给出了显示模型验证的结果，并讨论了模型的局限性。描述了诊断输入对最终平衡参数的影响。评估了电子密度轮廓细化的影响，发现可以忽略不计。展示了诊断的一个示例应用，表明 RIP 约束对平衡的影响与运动 Stark 效应约束相似。
