Observation of a spontaneous particle-transport barrier in the HL-2A tokamak.
Observation of a spontaneous particle-transport barrier in the HL-2A tokamak.
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DOI：
10.1103/physrevlett.104.215001
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发表时间：
2010-05
影响因子：
8.6
通讯作者：
W. Xiao;X. Zou;X. Ding;L. Yao;B. Feng;X. Song;S. Song;Y. Zhou;Z. T. Liu;B. Yuan
中科院分区：
文献类型：
--
作者：
W. Xiao;X. Zou;X. Ding;L. Yao;B. Feng;X. Song;S. Song;Y. Zhou;Z. T. Liu;B. Yuan
利用剖面分析、密度微扰输运分析和多普勒反射测量，首次证实了HL-2A装置欧姆等离子体中存在自发的稳态粒子输运势垒。已经发现了用于观察屏障的密度阈值。粒子扩散率是井一样的，对流被发现是向内的井外和向外的井内。势垒的形成与俘获电子模式和离子温度梯度驱动模式之间的转变相一致。
Using the profile analysis, the density perturbation transport analysis, and the Doppler reflectometry measurement, for the first time a spontaneous and steady-state particle-transport barrier has been evidenced in the Ohmic plasmas in the HL-2A tokamak with no externally applied momentum or particle input except the gas puffing. A threshold in density has been found for the observation of the barrier. The particle diffusivity is well-like, and the convection is found to be inward outside the well and outward inside the well. The formation of the barrier coincides with the transition between the trapped electron mode and the ion temperature gradient driven mode.