Internal transport barrier triggered by neoclassical transport in W7-AS
Internal transport barrier triggered by neoclassical transport in W7-AS
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DOI：
10.1103/physrevlett.86.5910
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发表时间：
2001-06-25
影响因子：
8.6
通讯作者：
Laqua, H
中科院分区：
文献类型：
--
作者：
Stroth, U;Itoh, K;Laqua, H
仿星器的三维磁结构提供了两种特定的机制，用于改善粒子和能量约束的过渡。一条路线通过所谓的电子根限制制度，这导致通过强径向电场的新古典输运的减少。在这封信中，提出了第二种途径的证据。它打开由于层的一个强烈变化的径向电场，这是目前在过渡区从新古典电子离子根限制。这种类型的改进作用于湍流输送。
The three-dimensional magnetic configuration of a stellarator offers two specific mechanisms for a transition to improved particle and energy confinement. One route goes through the so-called electron-root confinement regime, which leads to a reduction of neoclassical transport via strong radial electric fields. In this Letter evidence for a second route is presented. It opens due to the layer of a strongly varying radial electric field which is present in the transitional region from neoclassical electron to ion-root confinement. This type of improvement acts on turbulent transport.