Resonant sheath heating in weakly magnetized capacitively coupled plasmas due to electron-cyclotron motion
ORAL · Invited
Abstract
An electron heating mechanism based on a resonance between the gyrating electrons and the oscillating sheath is investigated in weakly magnetized capacitively coupled plasmas at low pressure. If the electron gyrofrequency coincides with half of the driving frequency, the gyrating electrons will coherently collide with the expanding sheath, gaining substantial energy. The plasma density is thus to see a pronounced increase in the case of resonance, which is verified experimentally. Particle simulations are carried out to reveal electron kinetics by tracking the trajectory of the resonant electron. It is found that the operating pressure, electrode gap, and driving voltage are important factors characterizing the resonance effect.
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Publication: [1] Sun et al 2022 Plasma Sources Sci. Technol. 31 045011<br>[2] Zhang et al 2021 Phys. Rev. E 104, 045209
Presenters
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Jing-Yu Sun
Dalian University of Technology, Dalian University of Technology, China
Authors
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Jing-Yu Sun
Dalian University of Technology, Dalian University of Technology, China
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Quan-Zhi Zhang
Dalian University of Technology, Dalian University of Technology, China
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Julian Schulze
Ruhr-University Bochum, Ruhr Univ Bochum, Ruhr University Bochum, Dalian University of Technology, Ruhr-University Bochum, Germany
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You-Nian Wang
Dalian University of Technology, Dalian University of Technolpgy, Dalian University of Technology, China