Spatiotemporal dynamics of cross-field ejection events in recombining detached plasma
Spatiotemporal dynamics of cross-field ejection events in recombining detached plasma
复制标题
重组分离等离子体中交叉场喷射事件的时空动力学
DOI：
10.1088/1361-6587/ab8e19
复制
发表时间：
2020
影响因子：
2.2
通讯作者：
Ohno Noriyasu
中科院分区：
文献类型：
--
作者：
Tanaka Hirohiko;Kajita Shin;Natsume Hiroki;Saeki Isaya;Ohno Noriyasu
在线性装置NAGDIS-II中，揭示了分离氦等离子体参数沿着时间、半径和磁场的三维时空动力学。为了测量在体积重组区域周围增强的径向等离子体喷射前后的等离子体参数，应用了条件平均技术。发现径向喷射与等离子体柱参数的低频变化相关，这似乎抑制了重组区的轴向运动。此外，观察到一个方位角的电荷分离内的喷射结构，类似于典型的边缘传输现象：滴状等离子体传输。中性流效应被认为是驱动力的候选者。
Three-dimensional spatiotemporal dynamics of detached helium plasma parameters along time, radius, and magnetic field were revealed in the linear device NAGDIS-II. To measure plasma parameters before and after the radial plasma ejection that was enhanced around the volume-recombining region, the conditional averaging technique was applied. The radial ejection was found to correlate with low-frequency changes of plasma-column parameters, which seemed to suppress the axial movement of the recombining region. Moreover, an azimuthal charge separation inside the ejected structure was observed, similar to the typical edge transport phenomenon: blobby plasma transport. The neutral flow effect was suggested as a candidate of the driving force.