Premium
Measurements of Plasma Potential and Electron Temperature Fluctuation in a Low‐Temperature Magnetized Plasma
Author(s) -
Ratynskaia S.V.,
Rypdal K.,
Demidov V.I.
Publication year - 2001
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/1521-3986(200109)41:5<449::aid-ctpp449>3.0.co;2-x
Subject(s) - plasma , electron temperature , physics , electron , atomic physics , toroid , instability , magnetic field , phase (matter) , plasma parameters , spectral line , electron density , computational physics , materials science , mechanics , nuclear physics , quantum mechanics , astronomy
Measurements of fluctuations of plasma potential and electron temperature in a toroidal magnetized plasma is carried out by applying a cylindrical probe with insulating end plugs oriented parallel to the B‐field in conjunction with another cylindrical probe oriented perpendicularly. Coherency and cross‐phase between $\bar V _f$ and $\bar T _e$ are estimated, and typically have values close to 0.6 and π respectively. Power‐law spectra are found for frequencies well above the poloidal rotation frequency with spectral index typically around 4.0 for $\bar V _f$ and around 2.5 for $\bar T _e$ . The density gradient is above the threshold for flute interchange instability, and the results are consistent with theory and global numerical simulations of this plasma.