Solid-state modulated kicker pulser

Abstract

AbsiractA solid-state high voltage pulse generator for highspeed beam kicker applications has been designed and tested at Lawrence Livermore National Laboratory. This kicker pulser uses multiple stages stacked in an inductiveadder configuration where the energy is switched from each stage of the adder by a parallel array of MOSFETs. Features include pulse width, format and amplitude agility all at a high pulse-repetition rate. The modulator can drive a 50!?? load at voltages up to 18kV with +/-10% amplitude modulation at several MHz burst frequency. Rise and fall times are on the order of 1 Ons, and the pulser can easily be configured for either positive or negative polarity. The presentation will include test and operational data collected from both the ETA I1 accelerator kicker and resistive dummy loads.

Scaled Accelerator Test For the DARHT-II Downstream Transport System

“…Many of the issues discussed earlier have been studied on the 5-MeV, 2-kA, 60-ns (with 40-ns flattop for δγ⁄γ = ± 1%) Experimental Test Accelerator II (ETA-II) [5], [6], [7], [8], [9] as shown by the check marks in Table 1. However, ETA-II is a single short pulse machine and cannot address issues specially concerning long pulse and multiple pulses.…”

“…Finally, the x-ray spot sizes for all pulses need to meet radiography requirement even though the high energy intensity beam pulses would interact with the time-evolving target plasma. Many of these issues had been studied on the 5-MeV, 2-kA, 60-ns Experimental Test Accelerator II (ETA-II) [5], [6], [7], [8], [9]. However, ETA-II is a single pulse machine and cannot address long pulse and multiple pulse issues.…”