Modelling of transient discharges along a sub-mm air-solid dielectric interface under fast-rising ramp voltages

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Abstract

Fast-rising high voltage impulses, gas-dielectric interfaces, and electrode topologies which generate significant electric field nonuniformity are features often encountered within pulsed power applications. The consideration of pre-breakdown and breakdown processes, especially those across gas-solid interfaces in divergent electric fields, is important for the operation and optimization of different pulsed power and low temperature plasma systems. In this work, primary ionization waves across a sub-mm solid-gas interface have been modelled in a 2D approximation using the drift-diffusion approach. They have been initiated from a needle electrode of 80 micrometers radius, partially embedded inside a solid dielectric, and partially exposed to air. The gap separation studied in this work was 250 micrometers, in which positive and negative ramp voltages were applied with rising slopes of 25,16.67,12.5, and 10kV/ns, emulating the rising edge of impulses with different rates of voltage rise. The resulting spatiotemporal evolution of the electric field and nonthermal plasma channel has been obtained and discussed. The obtained results can help in the development of pulsed power and nonthermal plasma systems, and further contributes to the fundamental understanding of the mechanisms driving gas-solid interfacial discharge under fast impulses with high dV/dt.
Original languageEnglish
Title of host publication2023 IEEE Pulsed Power Conference (PPC)
Place of PublicationPiscataway, NJ
PublisherIEEE
Number of pages5
ISBN (Electronic)9798350332339
ISBN (Print)9798350332346
DOIs
Publication statusPublished - 13 Nov 2023
EventIEEE 24th International Pulsed Power Conference - Texas, USA., San Antonio, United States
Duration: 25 Jun 202329 Jun 2023
https://ppc2023.org/

Publication series

NameIEEE International Pulsed Power Conference
ISSN (Print)2158-4915
ISSN (Electronic)2158-4923

Conference

ConferenceIEEE 24th International Pulsed Power Conference
Abbreviated titlePPC
Country/TerritoryUnited States
CitySan Antonio
Period25/06/2329/06/23
Internet address

Keywords

  • nonthermal plasma
  • gas-solid interface
  • pulsed power applications
  • low temperature plasma
  • streamer discharge
  • pulsed power systems

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