Yingjie Fu , Bingyang Feng , Mingtian Ye , Luokang Dong , Shenyi Qin , Zhengzheng Liu , Mengbing He
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引用次数: 0
Abstract
The electrically triggered vacuum surface flashover switch (VSFS) has the advantages of high-speed conduction, fast insulation recovery, compact size, and simple construction, making it well-suited for high voltage and high-power conversion applications. The on-state resistance, as a critical parameter of the VSFS, directly influences the output efficiency and lifetime of the pulse power system. In this paper, a theoretical model of the VSFS on-state resistance is proposed, and the effect of different phases of channel development on the on-state resistance is also investigated. Specifically, it covers the channel expansion and channel resistivity decline during three distinct developmental phases, the establishment of vacuum-stream channel, the resistance collapse of vacuum-stream channel, and the on state. The theoretical model demonstrates that increasing the operating voltage can effectively expand the channel width, and the channel voltage in the on-state is negative to the channel resistivity. Finally, the variation trend of the VSFS on-state resistance under square wave and exponential decay conditions was calculated using experimental waveforms, and the experimental results are consistent with the theoretical analysis.
期刊介绍:
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.