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Multichannel Operation of a Multi-Gap, Multichannel Spark Gap Switch Using a Low-Magnitude Trigger Pulse and Its Performance Evaluation.
- Source :
- IEEE Transactions on Plasma Science; Sep2021, Vol. 49 Issue 9, Part 2, p2878-2886, 9p
- Publication Year :
- 2021
-
Abstract
- This article describes the performance of a multi-gap, multichannel (MGMC) spark gap switch, evaluated numerically and experimentally, to achieve multichanneling using a relatively low-magnitude trigger pulse. First, an electrostatic analysis of the switch geometry was carried out using COMSOL Multiphysics 5.5 to determine the electric field distribution during high-voltage hold-off before triggering and to determine the coupling parameters between trigger and other intermediate electrodes of the switch. Second, a circuit model was developed in PSpice Lite 16.6 for predicting the process of channel formation and its influence on adjacent channels. Based on the simulation results obtained, a six-gap, eight-channel, planar MGMC switch operating in air has been designed and developed. The developed switch was, then, incorporated into a compact experimental setup to experimentally evaluate various switch parameters such as inductance, switching delay, jitter, and closing time when triggered using a negative-polarity trigger pulse of magnitude −40 kV, generated using a compact, in-house developed trigger generator. In contrast to most of the reported MGMC switches that use complicated Marx-based generators to produce ≥120-kV trigger pulses for multichannel formation, the experimental results, thus obtained, report comparable switch performance using a low-magnitude (−40 kV) trigger pulse. In addition, framing and streak camera images taken during the current discharge indicate the presence of ~6 luminous channels. In addition, short-circuit experiments for estimating switch inductance by consecutively shorting one or more channels also indicate multichanneling in the switch using a low-magnitude trigger pulse. [ABSTRACT FROM AUTHOR]
- Subjects :
- ELECTRIC fields
ELECTRIC inductance
ELECTRIC potential
ELECTRIC metal-cutting
Subjects
Details
- Language :
- English
- ISSN :
- 00933813
- Volume :
- 49
- Issue :
- 9, Part 2
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Plasma Science
- Publication Type :
- Academic Journal
- Accession number :
- 153812254
- Full Text :
- https://doi.org/10.1109/TPS.2021.3105023