Ultrafast gas breakdown at pressures below one atmosphere

H. Krompholz, L. Hatfield, A. Neuber, J. Chaparro, H. Y. Ryu, W. Justis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Scopus citations

Abstract

Gas breakdown in quasi homogeneous electric fields with amplitudes of up to 3 MV/cm is investigated. The setup consists of a RADAN 303 A pulser and pulse sheer SN 4, an impedance-matched oil-filled coaxial line with a lens-transition to a biconical line in vacuum or gas, and an axial or radial gap with a width on the order of mm, with a symmetrical arrangement on the other side of the gap. Capacitive voltage dividers allow to determine voltage across as well as conduction current through the gap, with a temporal resolution determined by the oscilloscope sampling rate of 20 GS/s and an analog bandwidth of 6 GHz. The gap capacitance charging time and voltage risetime across the gap is less than 250 ps. Previous experiments at TTU with a slightly larger risetime have shown that breakdown is governed by runaway electrons, with multi-channel formation and high ionization and light emission in a thin cathode layer only. In argon and air, time constants for the discharge development have been observed to have a minimum of around 100 ps at several 10 torr. A qualitative understanding of the observed phenomena and their dependence on gas pressure is based on explosive field emission and gaseous ionization for electron runaway conditions.

Original languageEnglish
Title of host publication2006 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
Pages569-572
Number of pages4
DOIs
StatePublished - 2006
Event2006 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP - Kansas City, MO, United States
Duration: Oct 15 2006Oct 18 2006

Publication series

NameAnnual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
ISSN (Print)0084-9162

Conference

Conference2006 Conference on Electrical Insulation and Dielectric Phenomena, CEIDP
CountryUnited States
CityKansas City, MO
Period10/15/0610/18/06

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  • Cite this

    Krompholz, H., Hatfield, L., Neuber, A., Chaparro, J., Ryu, H. Y., & Justis, W. (2006). Ultrafast gas breakdown at pressures below one atmosphere. In 2006 Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP (pp. 569-572). [4105497] (Annual Report - Conference on Electrical Insulation and Dielectric Phenomena, CEIDP). https://doi.org/10.1109/CEIDP.2006.311996