SMuK 2023 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 11: Poster I

P 11.39: Poster

Mittwoch, 22. März 2023, 14:00–15:30, HSZ EG

ECRH in early plasma formation — •Carl Albert Vilhelm Johansson and Pavel Aleynikov — IPP Greifswald, Wendelsteinstraße 1, Germany

The usage of electron cyclotron resonant heating (ECRH) is important in current operation of, amongst other devices, Wendelstein 7-X (W7-X) stellarator, and for future fusion devises. ECRH in the quasi–linear limit is theoretically well understood. However, because the ECRH system is used for plasma breakdown, there exists an interest in understanding the non–linear limit.

In this work, we consider the pre–ionization state. We show the energy gain of a single-electron interacting with the gyrotron beam once. For this interaction, we consider different magnetic field configurations. The interaction between electron and gyrotron beam yield a stronger coupling when located at the slope of the background magnetic field. The slope of the magnetic field dominates the effect for third harmonic interaction, whereas the second harmonic is less affected by the slope.