DEVELOPMENT OF THE INR DTL RF SYSTEM CROWBAR OPERATION

A.I. Kvashaª, V.L. Serov

Institute for Nuclear Research of Russian Academy of Sciences, Moscow, Russia

Abstract

DTL RF system of the INR linear accelerator consists of five RF channels. In turn, each channel maintains two powerful series connected vacuum tubes, installed in anode modulator and RF power amplifier PA. Operation of the both tubes is supplied with crowbar system that defends vacuum tubes from destroying as result of breakdowns in one of them. Since the energy storage in the INR DTL anode modulator is artificial forming line AFL (with impedance value 24 Ohm) in crowbar system can be used series thyristors and starting block, which opens the thyristors, when PA vacuum tube anode pulse current exceeds set-point value. In the paper an analysis of the processes in AFL and crowbar system is considered. Some results of the crowbar system upgrade are presented.

ª – corresponding author

Paper 

218