Optimum-confinement in the wendelstein 7-AS stellarator
Optimum-confinement in the wendelstein 7-AS stellarator
复制标题
wendelstein 7-AS 仿星器中的最佳约束
DOI：
10.1088/0741-3335/33/13/007
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发表时间：
1991
期刊：
影响因子：
--
通讯作者：
U. Schneider
中科院分区：
文献类型：
--
作者：
A. Weller;R. Brakel;R. Burhenn;V. Erckmann;P. Grigull;H. Hartfuss;H. Maassberg;H. Renner;H. Ringler;F. Sardei;U. Schneider
在Wendelstein 7-AS中，通过壁面调节和适当调整确定磁场结构的参数，实现了最佳约束。ECRF和中性束注入对净电流自由等离子体的有效加热涉及不同的等离子体参数和输运机制。固定等离子体通常由ECRF产生，而密度和杂质控制是NBI过程中的一个严重问题。这引发了不同种类的杂质和颗粒控制方案。电子温度为200 eV<or=Te<or=3 keV，离子温度为100 eV<or=Ti <or= 0.7 keV，电子密度为1019 <or= ne<or=3.1020 m-3。描述了能量约束、粒子和杂质输运的特性，并将其与比热源和粒子源联系起来。研究包括电子和离子导热分析，粒子输运模型和杂质输运激光吹离实验研究。讨论了双极电场的影响。
Optimum confinement is realized in Wendelstein 7-AS by wall conditioning and by properly adjusting the parameters determining the magnetic field configuration. The effective heating of net current free plasmas by ECRF and neutral beam injection (NBI) involves different plasma parameters and transport regimes. Stationary plasmas are generally produced by ECRF, whereas density and impurity control is a severe problem during NBI. This has initiated different kinds of impurity and particle control scenarios. An extended parameter range with electron temperatures of 200 eV<or=Te<or=3 keV, ion temperatures of 100 eV<or=Ti <or= 0.7 keV and electron densities of 1019 <or= ne<or=3.1020 m-3 was accessible. The characteristics of the energy confinement and the particle and impurity transport are described and related to the specific heat and particle sources. The investigations comprise the analysis of electron and ion heat conductivity, particle transport modelling and impurity transport studies by laser blow-off-experiments. The influence of the ambipolar electric field is discussed.
影响因子：
3.3
作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者：
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox