脉冲RF格式在撕裂模镇定中的应用
Pulsed RF Schemes for Tearing Mode Stabilization
摘要：
电流凝聚撕裂模的RF稳定化具有提高稳定化效率和放松功率局部化要求的潜力。这些好处源于RF沉积和由扩散控制的所得岛温度扰动之间的合作反馈。一个自洽的治疗射频射线的阻尼，因为它穿过岛屿表明，低阻尼的情况下，可能需要不利的高功率，以克服初始功率泄漏，并有效地利用非线性效应。在这项工作中，它表明，对于这样的制度，调制稳定计划可以实现显着改善加热和电流驱动的贡献，以稳定相同的平均功率作为一个连续波计划。调制频率和占空比对性能的影响进行了探讨，其结果表明，调制策略中的脉冲周期保持在扩散时间的顺序。
英文摘要：
The RF stabilization of tearing modes with current condensation has the potential to increase stabilization efficiency and loosen power localization requirements. Such benefits stem from the cooperative feedback between the RF deposition and resulting island temperature perturbation governed by diffusion. A self consistent treatment of the damping of an rf ray as it traverses the island shows that low damping scenarios can require unfavorably high powers to overcome initial power leakage and effectively capitalize on the nonlinear effect. In this work it is demonstrated that for such regimes,modulated stabilization schemes can achieve significant improvements in heating and current drive contributions to stabilization for the same average power as a continuous wave scheme. The impact of modulation frequency and duty cycle on the performance is explored, the results of which suggest modulation strategies in which the pulsing periods are kept on the order of a diffusive time.
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