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A plasma-triggered gas switch.

Yuansheng Li1, Jun Liu1, Weifan Xu1

  • 1State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan, Hubei 430074, China.

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|October 4, 2018
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Summary
This summary is machine-generated.

This study introduces a new ceramic plasma-triggered gas switch for pulsed power generators, achieving stable triggering with low jitter and high current capacity. This development enhances the performance and reliability of pulsed power systems.

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Area of Science:

  • Plasma physics
  • Electrical engineering
  • Materials science

Background:

  • Pulsed power generators require high-performance gas switches for reliable operation.
  • Existing switches often face challenges with jitter, trigger thresholds, and current handling.

Purpose of the Study:

  • To develop and characterize a novel ceramic, plasma-triggered gas switch for pulsed power applications.
  • To investigate the principles of plasma generation and breakdown in the trigger structure.
  • To evaluate the switch's performance in terms of jitter, trigger threshold, and current-carrying capability.

Main Methods:

  • Development of a high-dielectric-constant ceramic plasma-triggered gas switch.
  • Utilizing electron emission and surface flashover for initial plasma generation.
  • Experimental testing with a -50 kV peak negative pulse.
  • Numerical calculations to support experimental findings.

Main Results:

  • Stable triggering achieved with a -50 kV peak negative pulse.
  • Breakdown delay time jitter consistently measured at 2-3 ns.
  • Switch coefficient below 20% with this jitter performance.
  • Peak current-carrying ability of at least ±5 kA in dry air at atmospheric pressure.
  • Reliable triggering demonstrated with a 49.7% switch coefficient and low over-voltage ratio (0.16).

Conclusions:

  • The developed ceramic plasma-triggered gas switch offers low jitter and low trigger threshold.
  • The switch exhibits robust performance, including high current-carrying capacity.
  • This technology presents a significant advancement for pulsed power generator applications.