HETERODYNE RADIOMETER AT RIJNHUIZEN TOKAMAK PROJECT FOR ELECTRON-CYCLOTRON EMISSION AND ABSORPTION-MEASUREMENTS

被引:9
|
作者
VANGELDER, JFM
HUSMANN, KCE
MIEDEMA, HS
DONNE, AJH
机构
[1] FOM-Instituut voor Plasmafysica Rijnhuizen, Association Euratom-FOM, 3430 BE Nieuwegein
来源
REVIEW OF SCIENTIFIC INSTRUMENTS | 1995年 / 66卷 / 01期
关键词
D O I
10.1063/1.1146486
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
The 20-channel heterodyne radiometer of the Rijnhuizen Tokamak Project (RTP) measures microwaves in the range between 86 and 146 GHz. The spatial resolution is ∼7-16 mm parallel and 25-1300 mm2 perpendicular to the viewing direction, depending on the position in the torus. A waveguide network gives the opportunity to do alternate measurements of X- and O-mode electron cyclotron emission (ECE) from the low-field side (LFS) and X-mode ECE from the high-field side (HFS). A backward wave oscillator is installed at the HFS, for the purpose of measuring the electron cyclotron absorption (ECA) of the plasma. This set-up also provides a possibility for fast relative calibration of the radiometer. To reduce the effects of multiple-pass reflections and standing waves, Macor viewing dumps are mounted at both sides. A comparison of HFS and LFS ECE measurements during electron cyclotron heating will be given as a first result. First results of ECA measurements were obtained but will be presented in the future. © 1995 American Institute of Physics.
引用
收藏
页码:416 / 418
页数:3
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