A repetitive electron beam driver based on 6-stage linear transformer driver cavities.

Abstract

A repetitive electron beam driver based on 6-stage Linear Transformer Driver (LTD) cavities is presented. Each cavity consists of two Blumlein pulse forming networks (BPFNs) sharing a laser trigger switch. Voltage adding is obtained by means of Linear Transformer (LT) technology. The LTD cavity consists of two BPFNs connected in parallel, an LT with a ratio of 1:1, and a laser-triggered spark switch. The energy efficiency of a single LTD was investigated. The results show that the energy efficiency of an L-type BPFN and an LT was 94.3% and 92.8%, respectively. An electron beam driver consisting of 6 such cavities was developed with an output voltage of 740 kV, a current of 12.3 kA, and a power of 9.1 GW. The repetition frequency operation results show that the electron beam driver can operate stably for 20 s at 25 Hz with a jitter of approximately 1.7 ns.