螺旋波电流驱动的首次实验证据
First Experimental Evidence of Helicon Current Drive
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中文总结 AI 辅助
本文报道DIII-D装置上螺旋波电流驱动的首次实验证据，通过兆瓦级行波天线发射螺旋波，实现芯部功率沉积与电流驱动，并与射线追踪集成建模吻合，证实了螺旋波辅助电流驱动的可行性。
中文摘要 AI 辅助
螺旋波电流驱动是在反应堆条件下维持稳态托卡马克运行的一种有吸引力的电流驱动解决方案。在DIII-D装置上进行了专门实验，使用兆瓦级螺旋波系统，通过行波天线发射螺旋波，成功演示了芯部功率沉积和电流驱动。测得的电子温度对螺旋波功率注入的响应轮廓与同时包含射线追踪和热输运效应的时变集成建模结果吻合良好。当连续注入螺旋波功率以驱动同向等离子体电流（co-$I_p$）时，重建的安全因子轮廓平坦化速度显著加快，且与用相当量的电子回旋加热替代螺旋波的对比炮相比，锯齿振荡更早触发。螺旋波驱动电流轮廓的计算得出芯部呈峰值分布，与观测到的功率沉积轮廓一致，并与射线追踪预测吻合良好。综合来看，这些实验结果强有力地证明了在任何装置上首次明确观察到由螺旋波引起的辅助电流驱动。
英文摘要
Helicon current drive is an attractive solution for driving current to sustain steady state tokamak operation in reactor conditions. Dedicated DIII-D experiments have been conducted with a MW-level helicon system and successfully demonstrated core power deposition and current drive with helicon waves launched via a traveling wave antenna. The profile of the measured electron temperature response to helicon power injection is in good agreement with time-dependent integrated modeling that incorporates ray tracing and the effects of thermal transport simultaneously. When the helicon power is injected continuously to drive co-$I_p$ current, the reconstructed safety factor profile flattens significantly faster and sawteeth are triggered earlier than in comparison shots where the helicon is replaced by a comparable amount of electron cyclotron heating. Calculation of the helicon-driven current profile yields a peaked profile in the core, consistent with the observed power deposition profile and in good agreement with ray tracing predictions. Taken together, these experimental results represent strong evidence for the first definitive observation of auxiliary current drive due to helicon waves on any device.
发表机构
- General Atomics（通用原子能公司）
- University of California, Irvine（加州大学尔湾分校）
- Far-Tech, Inc（法拉科技有限公司）
- Massachusetts Institute of Technology（麻省理工学院）
机构由 AI 辅助整理，请以论文原文为准。
