TITLE

Electron cyclotron-electron Bernstein wave emission diagnostics for the COMPASS tokamak

AUTHOR(S)
Zajac, J.; Preinhaelter, J.; Urban, J.; Zacek, F.; Sestak, D.; Nanobashvili, S.
PUB. DATE
October 2010
SOURCE
Review of Scientific Instruments;Oct2010, Vol. 81 Issue 10, p10D911
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The COMPASS tokamak recently started operation at the Institute of Plasma Physics AS CR, v.v.i., Prague. A new 16-channel radiometer, operating alternatively in three frequency bands, has been designed and constructed. The system is prepared for detection of normal electron cyclotron emission (O1 or X2) or oblique electron Bernstein wave emission. The end-to-end calibration method includes all components that influence the antenna radiation pattern. A steady recalibration is possible using a noise generator connected to the radiometer input through a fast waveguide PIN-switch. Measurements of the antenna radiation characteristics (2D electric field) were performed in free space as well as in the tokamak chamber, showing the degradation effect of structures on the Gaussian beam shape. First plasma radiation temperature measurements from low-field circular plasmas are available.
ACCESSION #
54858174

 

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