Core electron-root confinement (CERC) in helical plasmas
Core electron-root confinement (CERC) in helical plasmas
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DOI：
10.1088/0029-5515/47/9/018
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发表时间：
2006-10
期刊：
影响因子：
3.3
通讯作者：
M. Yokoyama;H. Maassberg;C. Beidler;V. Tribaldos;K. Ida;T. Estrada;F. Castejón;A. Fujisawa;T. Minami;T. Shimozuma;Y. Takeiri;A. Dinklage;S. Murakami;Hiroshi Yamada
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文献类型：
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作者：
M. Yokoyama;H. Maassberg;C. Beidler;V. Tribaldos;K. Ida;T. Estrada;F. Castejón;A. Fujisawa;T. Minami;T. Shimozuma;Y. Takeiri;A. Dinklage;S. Murakami;Hiroshi Yamada
核心电子热约束的改进已在 CHS、LHD、TJ-II 和 W7-AS 等各种螺旋装置中实现。核心区域的强峰值电子温度分布和大的正径向电场 Er 是这种改进的限制的共同特征。这些观察结果与新古典输运背景下 Er 双极性条件的“电子根”解的转变是一致的，这是非轴对称构型所独有的。基于这一背景，这种改进的限制被统称为“核心电子根限制”（CERC）。针对碰撞性和电子回旋加速器加热功率找到了 CERC 建立的阈值。磁配置特性（例如有效波纹和磁岛/有理面）对于 CERC 的建立发挥着重要作用。
The improvement of core electron heat confinement has been realized in a wide range of helical devices such as CHS, LHD, TJ-II and W7-AS. Strongly peaked electron temperature profiles and large positive radial electric field, Er, in the core region are common features for this improved confinement. Such observations are consistent with a transition to the ‘electron-root’ solution of the ambipolarity condition for Er in the context of neoclassical transport, which is unique to non-axisymmetric configurations. Based on this background, this improved confinement has been collectively dubbed ‘core electron-root confinement’ (CERC). The thresholds for CERC establishment are found for the collisionality and electron cyclotron heating power. The magnetic configuration properties (e.g. effective ripple and magnetic islands/rational surfaces) play important roles for CERC establishment.