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Temporal evolution of the re-breakdown voltage in small gaps from nanoseconds to milliseconds

  • A detailed understanding of electric breakdown in dielectrics is of scientific and technological interest. In gaseous dielectrics, a so-called re-breakdown is sometimes observed after extinction of the previous discharge. Although time-dependent re-breakdown voltage is essentially known, its behavior immediately after the previous discharge is not precisely understood. We present an electronic circuit for accurate measurements of the time-dependent re-breakdown voltage in small gaps from tens of nanoseconds to several milliseconds after the previous spark. Results from such experiments are compared with earlier findings, and relevant physical mechanisms such as heating of the gas, decay of the plasma, and ionization of excited atoms and molecules are discussed. It is confirmed that the thermal model is not valid at times below several microseconds.

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Author:Heitor Cury Basso, Xunlin QiuORCiDGND, Werner Wirges, Reimund Gerhard-MulthauptORCiDGND
ISSN:0003-6951 (print)
Parent Title (English):Applied physics letters
Publisher:American Institute of Physics
Place of publication:Melville
Document Type:Article
Year of first Publication:2013
Year of Completion:2013
Release Date:2017/03/26
Funder:CAPES (Brazil); DAAD (Germany) [54392969, 316/09]; European Union
Organizational units:Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie
Peer Review:Referiert