Statistical properties of ion and electron temperature fluctuations in the edge of the COMPASS tokamak. (1st May 2022)

• Record Type: Journal Article
• Authors: Cipciar, D; Adamek, J; Horacek, J; Cavalier, J; Hron, M
• Is Part Of: Plasma physics and controlled fusion. Volume 64:Number 5(2022)
• Publication Date: 2022-05-01
• Subjects: turbulence -- ion temperature -- SOL -- tokamak -- COMPASS -- ball-pen probe -- L-mode; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/1361-6587/ac5a0b
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: This paper presents measurements of the plasma turbulence with an emphasis on the ion temperature fluctuations in comparison to the electron temperature and the ion saturation current fluctuations in the edge of the COMPASS tokamak. The ion temperature values are obtained by using a fast swept ball-pen probe, with temporal resolution up to 10 µ s, accompanied by independent 1 µ s measurements of the electron temperature and ion saturation current. The experimental results obtained for a wide range of line-averaged densities show that statistical properties of the fluctuations are in good agreement with a form of beta or gamma distribution function. In addition, the dependence of the averaged ion and electron temperatures on the line-averaged density is studied in the near and main scrape off layer region.