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A Compact, Multiple Channel 3 MV Gas Switch

  • S. Mercer
  • I. Smith
  • T. Martin

Abstract

A triggered, pressurized sulfur hexafluoride spark gap has been developed in which multiple parallel spark channels are consistently generated in close proximity to each other. In a test in which the switch drove a 60 ohm, 20 nsec pulse line, an average of four to six channels were created within a diameter of about 3 inches. Each channel was about 3.5 inches long in 175 psig SF6, and the total switch inductance was in the region of 90 nH. Triggering is effected by a field-enhanced electrode placed close to the ground electrode, a configuration known as the V/N switch. The trigger voltage at 3 MV pulse charge is 250 kV. The rms jitter of the switch breakdown is less than 1 nsec. It is expected that the high performance (low jitter obtained with a small ratio of trigger voltage to total voltage) will scale to much higher voltages. The switch used in the developmental tests was designed for oil immersion, and possessed a further novel feature, a pressure vessel that can withstand high electrical stress with good reliability. The pressure wall achieves this performance through the use of a segmented design, and withstood up to 3.75 MV over a total distance of about 8.5 inches.

Keywords

Ground Electrode Trigger Pulse Marx Generator Breakdown Time Sandia Laboratory 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    B. Bernstein, I. Smith, Aurora, An Electron Accelerator, IEEE Trans. Nuc. Sci. NS-20, 3, June 1973, p. 294.CrossRefGoogle Scholar

Copyright information

© Plenum Press, New York 1976

Authors and Affiliations

  • S. Mercer
    • 1
  • I. Smith
    • 1
  • T. Martin
    • 2
  1. 1.Physics International CompanySan LeandroUSA
  2. 2.Sandia LaboratoriesAlbuquerqueUSA

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