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

0348183 - ÚFP 2011 RIV US eng J - Journal Article
Zajac, Jaromír - Preinhaelter, Josef - Urban, Jakub - Žáček, František - Šesták, David - Nanobashvili, S.
Electron cyclotron-electron Bernstein wave emission diagnostics for the COMPASS tokamak.
Review of Scientific Instruments. Roč. 81, č. 10 (2010), 10D911-10D911. ISSN 0034-6748. E-ISSN 1089-7623.
[TOPICAL CONFERENCE ON HIGH-TEMPERATURE PLASMA DIAGNOSTICS/18th./. Wildwood, New Jersey, 16.05.2010-20.05.2010]
R&D Projects: GA ČR GA202/08/0419
Institutional research plan: CEZ:AV0Z20430508
Keywords : antenna radiation patterns * antennas in plasma * plasma diagnostics * Tokamak
Subject RIV: BL - Plasma and Gas Discharge Physics
Impact factor: 1.598, year: 2010
http://link.aip.org/link/?RSI/81/10D911

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.
Permanent Link: http://hdl.handle.net/11104/0188777