The effect of transient density profile shaping on transport in large stellarators and heliotrons
The effect of transient density profile shaping on transport in large stellarators and heliotrons
复制标题
瞬态密度剖面整形对大型仿星器和日光管传输的影响
DOI：
10.1088/1741-4326/aa6775
复制
发表时间：
2017
期刊：
影响因子：
3.3
通讯作者：
S.Morita
中科院分区：
文献类型：
--
作者：
A. Dinklage;R. Sakamoto;M. Yokoyama;J. Baldzuhn;C.D. Beidler;S.Morita
本文报道了铲运机上颗粒燃料实验的输运研究。颗粒注入LHD放电后的时空演化表明，在粒子输运过程的时间尺度上，中心密度增加。在密度弛豫过程中，温度梯度和密度梯度都发生了变化，而密度梯度的变化是一致的。由此产生的热力学作用力影响径向电场--既是驱动项，也是通过，例如影响离子输运的E-R相关性。已经发现，磁涨落是由弹丸注入引起的，但随着压力分布的松弛而消失。
Transport studies of pellet fuelling experiments on LHD are reported. Spatio-temporal evolutions after pellet injection into LHD discharges show cases where central density increases on the time scale of particle transport processes. Both the temperature gradient and the density gradient change during the density relaxation, the latter even in sign. The resulting thermodynamic forces influence radial electric fields—both as a driving term but also by, eg affecting the E r dependence of ion transport. Magnetic fluctuations have been found to be induced by pellet injection but die out with the relaxation of the pressure profile.