Inductive current density perturbations to probe electron internal transport barriers in tokamaks.
Inductive current density perturbations to probe electron internal transport barriers in tokamaks.
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DOI：
10.1103/physrevlett.94.105002
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发表时间：
2005-03
影响因子：
8.6
通讯作者：
O. Sauter;S. Coda;T. Goodman;M. Henderson;R. Behn;A. Bottino;E. Fable;A. Martynov;P. Nikkola;C. Zucca
中科院分区：
文献类型：
--
作者：
O. Sauter;S. Coda;T. Goodman;M. Henderson;R. Behn;A. Bottino;E. Fable;A. Martynov;P. Nikkola;C. Zucca
托卡马克等离子体中改进的电子能量限制与内部输运势垒有关，与非单调电流密度分布有关。这很难在实验上证明，因为通常电流分布不断变化，并且电流注入通常需要很大的输入功率。提出了一种新的实验方法，即利用感应电流在等离子体中心产生正负电流扰动，而输入功率可以忽略不计。这些结果首次明确地证明，仅通过扰动电流密度分布就可以显著地改变电子的限制。
Improved electron energy confinement in tokamak plasmas, related to internal transport barriers, has been linked to nonmonotonic current density profiles. This is difficult to prove experimentally since usually the current profiles evolve continuously and current injection generally requires significant input power. New experiments are presented, in which the inductive current is used to generate positive and negative current density perturbations in the plasma center, with negligible input power. These results demonstrate unambiguously for the first time that the electron confinement can be modified significantly solely by perturbing the current density profile.