Study for the microwave interferometer for high densities plasmas on COMPASS-U tokamak

0523797 - ÚFP 2021 RIV CH eng J - Článek v odborném periodiku
Varavin, Mykyta - Varavin, A. - Naydenkova, Diana - Zajac, Jaromír - Žáček, František - Nanobashvilil, S. - Pánek, Radomír - Weinzettl, Vladimír - Bílková, Petra - Kovařík, Karel - Jaulmes, F. - Farník, Michal - Imríšek, Martin - Bogár, Ondrej
Study for the microwave interferometer for high densities plasmas on COMPASS-U tokamak.
Fusion Engineering and Design. Roč. 146, September (2019), s. 1858-1862. ISSN 0920-3796. E-ISSN 1873-7196
Grant CEP: GA MŠMT(CZ) EF16_019/0000768
Institucionální podpora: RVO:61389021
Klíčová slova: Plasma diagnostics * Density measurement * Microwave interferometer * COMPASS-U tokamak
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 1.692, rok: 2019
Způsob publikování: Omezený přístup
https://www.sciencedirect.com/science/article/abs/pii/S0920379619303680?via%3Dihub

The present COMPASS tokamak at the Institute of Plasma Physics in Prague is equipped with the 2-mm interferometer, which gives a possibility to measure line-average electron densities up to 1.2 x 10(20) m(-3). A high magnetic field tokamak COMPASS-U will be designed and built to replace COMPASS. Higher line-average plasma densities in COMPASS-U of about 5 x 10(20) m(-3) will require a new design of the interferometer. This will provide measurements in a wide density range and will allow using a real-time gas puff density feedback. A solution based on the solid-state technology is proposed. The system will use two microwave transceivers with close sub-millimeter wavelengths and will fulfill the principle of the unambiguous measurement. An assessment of signal corrections corresponding to non-linearity effects caused by plasma refractive index is performed. The ray-tracing FIESTA-8 code was used to model the propagation of the probing waves through COMPASS-U plasmas.
Trvalý link: http://hdl.handle.net/11104/0308090