论文标题
用于撕裂模式稳定的脉冲RF方案
Pulsed RF Schemes for Tearing Mode Stabilization
论文作者
论文摘要
电流冷凝的撕裂模式的RF稳定有可能提高稳定效率并松开功率定位要求。这种益处源于RF沉积与由扩散控制的岛温度扰动之间的合作反馈。当它穿过岛上的RF射线阻尼时，自我一致的处理表明，低阻尼场景可能需要不利的高功率来克服初始功率泄漏并有效利用非线性效应。在这项工作中，可以证明，对于此类制度，调制稳定方案可以在加热和当前驱动器贡献与连续波方案相同的平均功率的稳定功能方面取得显着改善。探索了调制频率和占空比对性能的影响，其结果表明调制策略将脉冲周期保持在扩散时间的顺序上。
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.
