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A 800 kV compact peaking capacitor for nanosecond generator.

Authors
  • Jia, Wei
  • Chen, Zhiqiang
  • Tang, Junping
  • Chen, Weiqing
  • Guo, Fan
  • Sun, Fengrong
  • Li, Junna
  • Qiu, Aici
Type
Published Article
Journal
Review of Scientific Instruments
Publisher
American Institute of Physics
Publication Date
Sep 01, 2014
Volume
85
Issue
9
Pages
94706–94706
Identifiers
DOI: 10.1063/1.4895158
PMID: 25273753
Source
Medline
License
Unknown

Abstract

An extremely compact high voltage peaking capacitor is developed. The capacitor has a pancake structure with a diameter of 315 mm, a thickness of 59 mm, and a mass of 6.1 kg. The novel structural design endows the capacitor with a better mechanical stability and reliability under hundreds of kilovolts pulse voltage and an inner gas pressure of more than 1.5 MPa. The theoretical value of the capacitor self-inductance is near to 17 nH. Proved by series of electrical experiments, the capacitor can endure a high-voltage pulse with a rise time of about 20 ns, a half-width duration of around 25 ns, and an amplitude of up to 800 kV in a single shot model. When the capacitor was used in an electromagnetic pulse simulator as a peaking capacitor, the rise time of the voltage pulse can be reduced from 20 ns to less than 3 ns. The practical value of the capacitor's inductance deduced from the experimental date is no more than 25 nH.

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