Extension of high-beta plasma operation to low-collisionality regime
Extension of high-beta plasma operation to low-collisionality regime
复制标题
将高β等离子体操作扩展到低碰撞状态
DOI：
10.1088/1741-4326/aa65aa
复制
发表时间：
2017
期刊：
影响因子：
3.3
通讯作者：
Y. Takeiri and LHD Experiment Group1
中科院分区：
文献类型：
--
作者：
S. Sakakibara;K.Y. Watanabe;H. Funaba;Y. Suzuki;S. Ohdachi;K. Ida;K. Tanaka;T. Tokuzawa;T. Morisaki;M. Osakabe;Y. Takeiri and LHD Experiment Group1
在大型螺旋装置中，平均β大于4%的等离子体成功地产生了多丸注射在一个政权的碰撞性一个数量级低于以前的高β操作。粒子约束的改善，观察期间产生的气体喷流的高β放电，粒子通量的偏滤器减少了40%以上。在等离子体边缘发生高不稳定性，并抑制平均β的增量为3.4%。磁拓扑的自发变化导致平均β值的增加，同时触发边缘MHD不稳定性的激发。
In the large helical device, plasma with more than 4% average beta was successfully produced by multi-pellet injections in a regime with a collisionality one order of magnitude lower than that in previous high-beta operations. An improvement in particle confinement was observed during a high-beta discharge produced by a gas puff, and particle flux to the divertor was reduced by more than 40%. High instabilities at the plasma edge occurred and suppressed the increment of the average beta to 3.4%. A spontaneous change in the magnetic topology contributes to an increase in the average beta value while triggering the excitation of edge MHD instabilities.