Meo F, Bindslev H, Korsholm S B, Furtula V, Leuterer F, Leipold F, Michelsen P K, Nielsen S K, Salewski M, Stober J, Wagner D, Woskov P
Association EURATOM, Risø National Laboratory for Sustainable Energy, Technical University of Denmark, DK-4000 Roskilde, Denmark.
Rev Sci Instrum. 2008 Oct;79(10):10E501. doi: 10.1063/1.2989140.
The collective Thomson scattering (CTS) diagnostic installed on ASDEX Upgrade uses millimeter waves generated by the newly installed 1 MW dual frequency gyrotron as probing radiation at 105 GHz. It measures backscattered radiation with a heterodyne receiver having 50 channels (between 100 and 110 GHz) to resolve the one-dimensional velocity distribution of the confined fast ions. The steerable antennas will allow different scattering geometries to fully explore the anisotropic fast ion distributions at different spatial locations. This paper covers the capabilities and operational limits of the diagnostic. It then describes the commissioning activities carried out to date. These activities include gyrotron studies, transmission line alignment, and beam pattern measurements in the vacuum vessel. Overlap experiments in near perpendicular and near parallel have confirmed the successful alignment of the system. First results in near perpendicular of scattered spectra in a neutral beam injection (NBI) and ion cyclotron resonance heating (ICRH) plasma (minority hydrogen) on ASDEX Upgrade have shown evidence of ICRH heating phase of hydrogen.
安装在ASDEX Upgrade上的集体汤姆逊散射（CTS）诊断装置使用新安装的1兆瓦双频回旋管产生的毫米波作为105吉赫兹的探测辐射。它用一个具有50个通道（在100至110吉赫兹之间）的外差接收器测量背向散射辐射，以解析约束快离子的一维速度分布。可转向天线将允许采用不同的散射几何结构，以充分探索不同空间位置处的各向异性快离子分布。本文涵盖了该诊断装置的功能和运行限制。然后描述了迄今为止开展的调试活动。这些活动包括回旋管研究、传输线对准以及在真空容器中的波束方向图测量。近垂直和近平行的重叠实验证实了系统的成功对准。在ASDEX Upgrade上对中性束注入（NBI）和离子回旋共振加热（ICRH）等离子体（氢同位素）进行的近垂直散射光谱的初步结果显示了氢的ICRH加热阶段的证据。
