Role of edge electric field and poloidal rotation in the L-H transition.
Role of edge electric field and poloidal rotation in the L-H transition.
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DOI：
10.1103/physrevlett.64.3015
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发表时间：
1990-06
影响因子：
8.6
通讯作者：
R. Groebner;K. Burrell;R. Seraydarian
中科院分区：
文献类型：
--
作者：
R. Groebner;K. Burrell;R. Seraydarian
边缘径向电场和边缘极向自转速度的显著变化是DIII-D托卡马克发生从L到H的转变的重要标志。剪切存在于{italE}{sub{itrr}}和{italv}{sub{theta}}中，并从{italE}模式增加到{italH}模式。实验与理论的比较表明，在{italE}{sub{italr}}和{italv}{sub{theta}}中的剪切足以抑制边缘涨落，离子轨道损耗足够大，足以成为{italv}{sub{theta}}的来源，并且{italE}{sub{itr}}和{italv}{sub{theta}}可能在{italL}-{italH}相变中起因果作用。
Marked changes in the edge radial electric field {ital E}{sub {ital r}} and in the edge poloidal rotation velocity {ital v}{sub {theta}} are important signatures of the {ital L}-{ital H} transition in the DIII-D tokamak. Shear exists in {ital E}{sub {ital r}} and {ital v}{sub {theta}} and increases from the {ital L} mode to the {ital H} mode. A comparison of experiment with theory shows that shear in {ital E}{sub {ital r}} and {ital v}{sub {theta}} is sufficient to suppress edge fluctuations, that ion-orbit loss is large enough to be the source of {ital v}{sub {theta}}, and that {ital E}{sub {ital r}} and {ital v}{sub {theta}} may play a causal role in the {ital L}-{ital H} transition.