IShTAR: a helicon plasma source to characterise the interactions between ICRF and plasma
IShTAR: a helicon plasma source to characterise the interactions between ICRF and plasma
复制标题
IShTAR：螺旋等离子体源，用于表征 ICRF 和等离子体之间的相互作用
DOI：
--
复制
发表时间：
2016
期刊：
影响因子：
--
通讯作者：
J. Noterdaeme
中科院分区：
文献类型：
--
作者：
K. Crombé;R. D’Inca;J. Jacquot;R. Ochoukov;M. Usoltceva;A. Kostic;F. Louche;D. V. Eester;A. Nikiforov;J. Moreno;S. Heuraux;S. Devaux;J. Moritz;E. Faudot;H. Fuenfgelder;H. Faugel;F. Zeus;J. Noterdaeme
IShTAR（离子鞘测试装置）致力于研究ICRF天线和等离子体在代表磁约束聚变机等离子体边缘的条件（等离子体温度和密度、磁配置）下的相互作用。该实验台由螺旋等离子体源和主容器组成，主容器内安装有ICRF天线。首先，提出了等离子体源的优化，以获得最高密度和最径向均匀的等离子体（通过改变源的位置和通过扫描操作参数）。此外，安装的诊断（补偿/非补偿朗缪尔探针，B点探针，宽带光谱仪）的效率进行了讨论。第二部分讨论了ICRF操作对产生的等离子体的影响;记录了真空和等离子体中的波剖面。的本征模的影响，由于小尺寸的容器上的波场在接口天线/等离子体进行评估。的密度分布上的附加电离的效果也测量与附近的等离子体电位的空间变化和内部的RF鞘在前面的天线带。最后，诊断的可行性，直接测量鞘层中的电场，通过使用从斯塔克效应和混合修改的能级的发射的变化进行了讨论。
IShTAR (Ion Sheath Test ARrangement) is dedicated to the investigation of the interactions between an ICRF antenna and a plasma in the conditions (plasma temperature and density, magnetic configuration) representative of the plasma edge of a magnetic confinement fusion machine. The test bed is composed of a helicon plasma source and a main vessel, in which a dedicated single strap ICRF antenna is installed. Firstly, the optimisation of the plasma source in order to get the highest density and most radially uniform plasma is presented (by changing of the position of the source and by scanning the operational parameters). In addition, the efficiency of the installed diagnostics (compensated/non-compensated Langmuir probes, B-dot probes, a wideband spectrometer) is discussed. The second part addresses the effect of the ICRF operation on the generated plasma; the wave profiles in vacuum and plasma are recorded. The impact of the eigenmodes due to the small size of the vessel on the wave field at the interface antenna/plasma is evaluated. The effect of the additional ionisation on the density profile is also measured with the spatial variation of the plasma potential near and inside the RF sheath in front of the antenna strap. Finally, the feasibility of a diagnostic to directly measure the electrical field in the sheath by using the change in emission from energy levels modified by Stark effect and mixing is discussed.