Enhancement of Ohmic heating by Hall current in magnetized capacitively coupled discharges

Bocong Zheng, Keliang Wang, Timothy Grotjohn, Thomas Schuelke, Qi Hua Fan*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

42 Citations (Scopus)

Abstract

In low-pressure capacitively coupled discharges, a heating mode transition from a pressure-heating dominated state to an Ohmic-heating dominated state is known by applying a small transverse magnetic field. Here we demonstrate via particle-in-cell simulations and a moment analysis of the Boltzmann equation that the enhancement of Ohmic heating is induced by the Hall current in the E × B direction. As the magnetic field increases, the Ohmic heating in the E × B direction dominates the total electron power absorption. The Ohmic heating induced by the Hall current can be well approximated from the Ohmic heating of unmagnetized capacitively coupled discharges.

Original languageEnglish
Article number09LT03
JournalPlasma Sources Science and Technology
Volume28
Issue number9
DOIs
Publication statusPublished - 24 Sept 2019
Externally publishedYes

Keywords

  • Ohmic heating
  • capacitively coupled plasmas
  • electron power absorption
  • magnetic field
  • moments of Boltzmann equation
  • particle in cell simulations

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