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Title: Transition characteristics and electron kinetics in microhollow cathode discharges

Abstract

We demonstrate the transition characteristics and electron kinetics of microdischarges in a microgap with a cathode having microstructures using two-dimensional particle-in-cell/Monte Carlo collision (2d3v) simulations. It is found that the microdischarge is inside the hollow cavity at lower pressures, forming microhollow cathode discharges (MHCDs), while the dominant discharge moves outside the cavity at higher pressures, locating above the cathode rectangular protrusion tip. The spatial distributions of the microdischarge parameters (e.g., electric potential and electron density) are presented by capturing the transition characteristics. The electron kinetics of the microdischarges are examined based on the moment analysis of the electron Boltzmann equation. The collisional and non-collisional components of the electron power absorption are decomposed, which were seldomly investigated for microdischarges previously. The results provide fundamental insights into MHCD formation with a structured electrode at varying pressure conditions, which could be beneficial for the design and fabrication of microplasma devices in practical applications.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3]; ORCiD logo [4]; ORCiD logo [1]
  1. Michigan State Univ., East Lansing, MI (United States). Dept. of Computational Mathematics, Science and Engineering; Michigan State Univ., East Lansing, MI (United States). Dept. of Electrical and Computer Engineering
  2. Michigan State Univ., East Lansing, MI (United States). Fraunhofer Center for Coatings and Diamond Technologies
  3. Michigan State Univ., East Lansing, MI (United States). Dept. of Electrical and Computer Engineering
  4. Michigan State Univ., East Lansing, MI (United States). Dept. of Electrical and Computer Engineering; Michigan State Univ., East Lansing, MI (United States). Fraunhofer Center for Coatings and Diamond Technologies; Michigan State Univ., East Lansing, MI (United States). Dept. of Chemical Engineering and Material Science
Publication Date:
Research Org.:
Univ. of Michigan, Ann Arbor, MI (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1850773
Alternate Identifier(s):
OSTI ID: 1756214
Grant/Contract Number:  
SC0001939; FA9550-18-1-0062; 1917577; 1724941
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 129; Journal Issue: 2; Journal ID: ISSN 0021-8979
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; Physics; gas discharges; plasma devices; collision frequency; electron density; plasma simulation; plasma ionization; particle-in-cell method; plasma properties and parameters; plasma sheaths; microchannel

Citation Formats

Fu, Yangyang, Zheng, Bocong, Zhang, Peng, Fan, Qi Hua, and Verboncoeur, John P. Transition characteristics and electron kinetics in microhollow cathode discharges. United States: N. p., 2021. Web. doi:10.1063/5.0033282.
Fu, Yangyang, Zheng, Bocong, Zhang, Peng, Fan, Qi Hua, & Verboncoeur, John P. Transition characteristics and electron kinetics in microhollow cathode discharges. United States. https://doi.org/10.1063/5.0033282
Fu, Yangyang, Zheng, Bocong, Zhang, Peng, Fan, Qi Hua, and Verboncoeur, John P. Fri . "Transition characteristics and electron kinetics in microhollow cathode discharges". United States. https://doi.org/10.1063/5.0033282. https://www.osti.gov/servlets/purl/1850773.
@article{osti_1850773,
title = {Transition characteristics and electron kinetics in microhollow cathode discharges},
author = {Fu, Yangyang and Zheng, Bocong and Zhang, Peng and Fan, Qi Hua and Verboncoeur, John P.},
abstractNote = {We demonstrate the transition characteristics and electron kinetics of microdischarges in a microgap with a cathode having microstructures using two-dimensional particle-in-cell/Monte Carlo collision (2d3v) simulations. It is found that the microdischarge is inside the hollow cavity at lower pressures, forming microhollow cathode discharges (MHCDs), while the dominant discharge moves outside the cavity at higher pressures, locating above the cathode rectangular protrusion tip. The spatial distributions of the microdischarge parameters (e.g., electric potential and electron density) are presented by capturing the transition characteristics. The electron kinetics of the microdischarges are examined based on the moment analysis of the electron Boltzmann equation. The collisional and non-collisional components of the electron power absorption are decomposed, which were seldomly investigated for microdischarges previously. The results provide fundamental insights into MHCD formation with a structured electrode at varying pressure conditions, which could be beneficial for the design and fabrication of microplasma devices in practical applications.},
doi = {10.1063/5.0033282},
journal = {Journal of Applied Physics},
number = 2,
volume = 129,
place = {United States},
year = {Fri Jan 08 00:00:00 EST 2021},
month = {Fri Jan 08 00:00:00 EST 2021}
}

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