Divertor studies in the l=3 URAGAN-3M torsatron
Divertor studies in the l=3 URAGAN-3M torsatron
复制标题
l=3 URAGAN-3M tosatron 中的偏滤器研究
DOI：
10.1088/0741-3335/37/3/007
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发表时间：
1995
影响因子：
2.2
通讯作者：
E. Volkov
中科院分区：
文献类型：
--
作者：
V. Bykov;V. Chechkin;I. P. Fomin;L. I. Grigor’eva;A. V. Khodyachikh;N. Nazarov;R. Pavlichenko;V. G. Peletminskaya;V. Plyusnin;A. I. Skibenko;E. L. Sorokovoj;V. S. Vojtsenya;E. Volkov
在 l=3、m=9 URAGAN-3M torsatron 中，实现了开放式螺旋偏滤器。等离子体是通过射频产生并加热的。利用微波和探针技术研究了螺旋绕组两个线圈之间以及螺旋绕组外侧的等离子体的时间和空间特性。实验测量之前进行数值偏滤器场线追踪。计算和测量的结果表明，偏转等离子体的形成是由于(i)血浆从限制体积中输送出来； (ii) 近天线场的中性气体电离。从限制体积输送的转向等离子体的流量随着射频功率的增加而增加。这被认为是粒子损失随着加热功率的增加而增加的直接证据，最近已经在 NBI 和 ECR 加热条件下针对仿星器型装置推导出了这种效应。沿着穿过工作天线的开放场线的强烈射频放电会导致转向等离子体密度大大增加，在天线附近出现高达 150 V 的静态正等离子体电势，并且可能会在限制区域之外产生显着的额外射频功率损耗。
In the l=3, m=9 URAGAN-3M torsatron an open helical divertor is realized. Plasmas are RF produced and heated. The time and space characteristics of the plasma in the space between two coils of the helical winding and on the outward side of the helical winding are studied by microwave and probe techniques. The experimental measurements are preceded by numerical divertor field line tracing. As a result of the calculations and measurements, it is shown that the diverted plasma is formed due to (i) plasma transportation from the confinement volume; and (ii) neutral gas ionization by the near-antenna field. The flow of diverted plasma transported from the confinement volume increases with RF power. This is considered as direct evidence of an increase in particle loss with an increase in heating power, the effect having been deduced recently for a stellarator-type device under NBI and ECR heating conditions. An intense RF discharge along open field lines crossing the operating antenna results in a greatly increased diverted plasma density, in the appearance of a static positive plasma potential up to 150 V near the antenna, and possibly in significant additional RF power loss outside the confinement region.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox