CERN Accelerating science

Article
Title	5 MW 805 MHz SNS RF System Experience
Author(s)	Young, Karen A ; Anthony Torrez, Phillip ; Hardek, Thomas ; Lynch, Michael ; Rees, Daniel ; Roybal, William ; Tallerico, Paul J ; Thomas Bradley, Joseph
Affiliation	(LANL, Los Alamos, New Mexico) ; (LANL/LANSCE, Los Alamos, New Mexico)
Publication	2005
In:	21st IEEE Particle Accelerator Conference, Knoxville, TN, USA, 16 - 20 May 2005, pp.3280
Subject category	Accelerators and Storage Rings
Abstract	The RF system for the 805 MHz normal conducting linac of the Spallation Nuetron Source (SNS) accelerator was designed, procured and tested at Los Alamos National Laboratory(LANL) and then installed and commissioned at Oak Ridge National Laboratory (ORNL). The RF power for this room temperature coupled cavity linac (CCL) of SNS accelerator is generated by four pulsed 5 MW peak power klystrons operating with a pulse width of 1.25 mSec and a 60 Hz repetition frequency. The RF power from each klystron is divided and delivered to the CCL through two separate RF windows. The 5 MW RF system advanced the state of the art for simultaneous peak and average power. This paper summarizes the problems encountered, lessons learned and results of the high power testing at LANL of the 5 MW klystrons, 5 MW circulators, 5 MW loads, and 2.5 MW windows.*