Development of a sub-nanosecond pulse generator and its beam experiments.

Abstract

A sub-nanosecond pulse generator (sub-nano-PG) for the electron gun of Hefei Advanced Light Facility (HALF; Hefei, China) was developed and assessed in this study. The designed sub-nano-PG comprised avalanche transistors, a printed circuit board with a tapered impedance discharge structure, and a compensation inductor. The discharge structure and compensation inductance were found to optimize the output waveform. In addition, the sub-nano-PG was found to generate a -757 V pulse with 511 ps full width at half-maximum. The beam experiment results showed that the beam current stability was better than 1.6% at 1 A beam current, which complied with the design requirements of HALF.