Design and Testing of the 5 KHz, 3 MW Thyratron Modulators for ETA (Experimental Test Accelerator) II.

摘要

The Experimental Test Accelerator (ETA) II is a new, high-average- power, linear induction accelerator built at Lawrence Livermore National Laboratory to support Free-Electron-Lasers (FEL), research. ETA-II will also be used as a source of high-power microwaves for plasma heating experiments on the Microwave Tokamak Experiment (MTX). It can generate 1--3-kA, 70-ns electron beam pulses and accelerate them to 7--9-MeV. ETA-II is different from other linear induction accelerators in that it will have the ability to generate the electron beam at a 5 kHz repetition rate for 30-sec. Magnetic pulse compression and high-power thyratron modulators are used to generate the 125-kV accelerator drive pulses. This paper describes the design of the thyratron modulators, results of thyratron testing, and operation of the ETA-II system. 3 refs., 6 figs., 3 tabs. (ERA citation 13:049392)