A 7.8 kV nanosecond pulse generator with a 500 Hz repetition rate

作者：Munan Lin, Hui Liao, Meiwen Liu, Guanghui Zhu, Zhida Yang, Peiyun Shi, Qi Lu, Xuan Sun · 发表于：Journal of Instrumentation · 年份：2018 · DOI：10.1088/1748-0221/13/04/p04004 · 被引用次数：12 · 研究领域：Gyrotron and Vacuum Electronics Research、Pulsed Power Technology Applications、Plasma Applications and Diagnostics

Pseudospark switches are widely used in pulsed power applications. In this paper, we present the design and performance of a 500 Hz repetition rate high-voltage pulse generator to drive TDI-series pseudospark switches. A high-voltage pulse is produced by discharging an 8 μF capacitor through a primary windings of a setup isolation transformer using a single metal-oxide-semiconductor field-effect transistor (MOSFET) as a control switch. In addition, a self-break spark gap is used to steepen the pulse front. The pulse generator can deliver a high-voltage pulse with a peak trigger voltage of 7.8 kV, a peak trigger current of 63 A, a full width at half maximum (FWHM) of ∼30 ns, and a rise time of 5 ns to the trigger pin of the pseudospark switch. During burst mode operation, the generator achieved up to a 500 Hz repetition rate. Meanwhile, we also provide an AC heater power circuit for heating a H 2 reservoir. This pulse generator can be used in circuits with TDI-series pseudospark switches with either a grounded cathode or with a cathode electrically floating operation. The details of the circuits and their implementation are described in the paper.