An atmospheric pressure discharge is an electrical discharge in air or another gas at atmospheric pressure.[1]

An electrical discharge in a gas forms plasma. Plasmas are sustained if there is a continuous inflow of energy to maintain the required degree of ionization by counterbalancing the recombination events that lead to extinction of the discharge. The number of recombination events per unit time and per unit volume is proportional to the density of each recombining plasma species (ions and electrons)[2] and, thus, grows fast with the gas pressure. Therefore, compared to lower-pressure discharges, atmospheric discharges require a higher power to maintain.

Typical atmospheric discharges are:

References

  1. ↑ Bruggeman, Peter; Brandenburg, Ronny (31 October 2013). "Atmospheric pressure discharge filaments and microplasmas: physics, chemistry and diagnostics". Journal of Physics D: Applied Physics. 46 (46): 464001. Bibcode:2013JPhD...46T4001B. doi:10.1088/0022-3727/46/46/464001. ISSN 0022-3727. S2CID 121868756.
  2. ↑ Griem, Hans R. (1997). Principles of Plasma Spectroscopy. Cambridge Monographs on Plasma Physics. Cambridge: Cambridge University Press. ISBN 978-0-521-61941-7. Retrieved 2020-12-15.
  3. ↑ Li, X.; et, al (2017). "Generation of a planar direct-current glow discharge in atmospheric pressure air using rod array electrode". Sci Rep. 7 (1): 2672. Bibcode:2017NatSR...7.2672L. doi:10.1038/s41598-017-03007-1. PMC 5453952. PMID 28572620.


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