Commissioning activities and first results from the collective Thomson scattering diagnostic on ASDEX Upgrade (invited)

被引：50
|
作者：
Meo, F. [1 ]
Bindslev, H. [1 ]
Korsholm, S. B. [1 ]
Furtula, V. [1 ]
Leuterer, F. [3 ]
Leipold, F. [1 ]
Michelsen, P. K. [1 ]
Nielsen, S. K. [1 ]
Salewski, M. [1 ]
Stober, J. [2 ]
Wagner, D. [2 ]
Woskov, P. [3 ]
机构：
[1] Tech Univ Denmark, EURATOM Assoc, Riso Natl Lab Sustainable Energy, DK-4000 Roskilde, Denmark
[2] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany
[3] MIT PSFC, Cambridge, MA 02139 USA
来源：
REVIEW OF SCIENTIFIC INSTRUMENTS | 2008年 / 79卷 / 10期
关键词：
gyrotrons; heterodyne detection; millimetre waves; multifrequency antennas; plasma diagnostics; Thomson effect;
D O I：
10.1063/1.2989140
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
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.
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页数：8
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