SNS extraction kicker power supply prototype test

Abstract

The SNS (Spallation Neutron Source) accumulator ring extraction system consists of a fast kicker and a Lambertson septum magnet. The proposed design will use 14 kicker magnets powered by an extraction kicker power supply system. They will eject the high power beam from the SNS accumulator ring into RTBT (ring to target beam tunnel) through a Lambertson septum magnet. This paper describes some test results of the SNS extraction kicker power supply prototype. The high repetition rate of 60 pulse per second operation is the challenging part of the design. In the prototype testing, a 3 kA damp current of 700 ns pulse-width, 200 ns rise time and 60 Hz repetition rate at 32 kV PFN operation voltage has been demonstrated. An extraction kicker power supply system design diagram is depicted.