Plasma equilibrium and confinement in a tokamak with nearly zero central current density in JT-60U.
Plasma equilibrium and confinement in a tokamak with nearly zero central current density in JT-60U.
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JT-60U 中中心电流密度几乎为零的托卡马克中的等离子体平衡和约束。
DOI：
10.1103/physrevlett.87.245001
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发表时间：
2001
影响因子：
8.6
通讯作者：
H. Shirai
中科院分区：
文献类型：
--
作者：
T. Fujita;T. Oikawa;T. Suzuki;S. Ide;Y. Sakamoto;Y. Koide;T. Hatae;O. Naito;A. Isayama;N. Hayashi;H. Shirai
在JT-60 U托卡马克装置上首次观察到中心区环向电流几乎为零的高约束平衡（电流空穴），并稳定存在数秒。这一观测结果表明，在没有中心环向电流的情况下，托卡马克的稳定运行是可能的;中心环向电流以前被认为是托卡马克所必需的。电流孔的半径延伸到等离子体小半径的40%。观察到电流洞是由离轴无感电流的增加而形成的。
A high confinement equilibrium with nearly zero toroidal current in the central region (a "current hole") has been observed for the first time to persist stably for several seconds in the JT-60U tokamak. This observation indicates the possibility of stable tokamak operation without central toroidal current; the central current has previously been believed to be necessary in tokamaks. The radius of the current hole extended up to 40% of the plasma minor radius. It was observed that the current hole was formed by the increase of the off-axis noninductive current.