Number of the records: 1
Microwave reflectometer for density profile and turbulence measurements on the COMPASS tokamak
- 1.
SYSNO ASEP 0531029 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Microwave reflectometer for density profile and turbulence measurements on the COMPASS tokamak Author(s) Bogár, Ondrej (UFP-V) ORCID
Zajac, Jaromír (UFP-V) RID
Žáček, František (UFP-V) RID
Varavin, Mykyta (UFP-V)
Hron, Martin (UFP-V) RID, ORCID
Pánek, Radomír (UFP-V) RID
Silva, A. (PT)Number of authors 7 Article number 013515 Source Title Review of Scientific Instruments. - : AIP Publishing - ISSN 0034-6748
Roč. 91, č. 1 (2020)Number of pages 8 s. Language eng - English Country US - United States Keywords COMPASS ; tokamak ; turbulence measurement Subject RIV BL - Plasma and Gas Discharge Physics OECD category Fluids and plasma physics (including surface physics) R&D Projects LM2015045 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) GA19-15229S GA ČR - Czech Science Foundation (CSF) Method of publishing Limited access Institutional support UFP-V - RVO:61389021 UT WOS 000518011500003 EID SCOPUS 85078679114 DOI 10.1063/1.5099345 Annotation The fast microwave reflectometer system on the COMPASS tokamak consists of an O-mode polarized K-band (18 GHz-26 GHz), Ka-band (26 GHz-40 GHz), and a part of U-band (40 GHz-54 GHz). The plasma density profile from the edge plasma area is measured using a fast sweeping rate up of to 6 μs of the probing wave. The processing of the reflected signal is realized by the heterodyne detection configuration based on the I/Q modulator. Two different methods of dynamic calibration of the required linear sweep frequency, together with static frequency and dispersion calibration, were used. The electron density profile was reconstructed by a spectrogram-based method with four sweeps on average. The system has the capability to measure the mid-plane low-field side electron density profile in the density range from 4 × 1018 m-3 to 3.6 × 1019 m-3. Experimental results obtained on COMPASS discharges are presented to demonstrate the performance of the diagnostics. Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2021 Electronic address https://aip.scitation.org/doi/10.1063/1.5099345
Number of the records: 1