论文标题
具有失控电子等离子体中射频发射的快速动力学
Fast dynamics of radiofrequency emission in plasmas with runaway electrons
论文作者
论文摘要
在存在失控电子（RE）的情况下，在0.4-3 GHz中的射频发射范围从FTU等离子体（RE）进行了前所未有的高时间分辨率测量。与增强的螺距角度散射相关的快速发射爆发表明动力学不稳定性影响了RE种群从堆积阶段的演变。此类测量还为早期重建过程中的不稳定性提供了敏感的监视器。无线电爆发的前缘比低排放的交织期短得多。生长过程中的光谱宽扩大表明非线性波耦合是观察到的间歇性的解释。射频发射在干扰后的重新植物开始时消失，随后以非常强烈的爆发形状重新出现，并伴随着剧烈的电子环状基因发射的强烈升高。
Radiofrequency emission in the 0.4 - 3 GHz range from FTU plasmas in presence of runaway electrons (RE) has been measured with unprecedentedly high time resolution. Rapid emission bursts associated with enhanced RE pitch angle scattering reveal kinetic instabilities affecting evolution of the RE population from the buildup phase. Such measurements also provide a sensitive monitor for instabilities during early RE formation. The leading edge of radio bursts is much shorter than interleaving periods of low emission; spectral broadening during growth indicates nonlinear wave coupling as an explanation for the observed intermittency. Radiofrequency emission disappears at the beginning of post-disruption RE plateaus, and subsequently reappears in the shape of very intense bursts accompanied by strong rises of suprathermal electron cyclotron emission.
