Erlangen 2026 – wissenschaftliches Programm
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P: Fachverband Plasmaphysik
P 16: Poster Session Plasma Physics
P 16.94: Poster
Donnerstag, 19. März 2026, 13:45–15:45, Redoutensaal
Measurement of electron-temperature dynamics in TJ-K plasmas — •Rimae Lamara Mhend, Alf Köhn-Seemann, and Mirko Ramisch — IGVP, University of Stuttgart, Germany
Heat-flux analyses for energy confinement studies in magnetized plasmas require the resolution of the fast plasma-temperature dynamics. While the electron temperature Te can be deduced from swept Langmuir probes, extending this procedure to time scales in the microsecond range is experimentally challenging. A simple approach using a triple probe diagnostic system, measuring the potential of a biased double probe against that of a single floating probe, provides direct access to fluctuations in Te. In this work, a triple probe is set up for use in the magnetized plasmas of the torsatron TJ-K and tested against swept single-probe characteristics. Statistical properties of Te fluctuations measured along radial profiles are presented and characterized under variation of the drift scale ρs=√Te Mi/eB for ion masses Mi ranging from hydrogen over helium to argon.