April 2026

Conference Paper

Operating Klystrons at the Spallation Neutron Source – Two Decades of Perspective

By:
Moss, John S; Toby, George D; Miner, Timothy T; Passmore, William S; Peters, Charles C
Page Number:
1-2
Book Title:
2025 26th International Vacuum Electronics Conference (IVEC)
Publication Date:
April 16, 2026
Conference Name:
2025 26th International Vacuum Electronics Conference (IVEC)
Conference Location:
Rotterdam, Netherlands
Conference Sponsor:
IEEE and ESA
View DOI Listing:
https://doi.org/10.1109/IVEC63678.2025.11115263

Abstract

Klystron amplifiers have been operated at the Spallation Neutron Source (SNS) in support of the user program since 2006. SNS tubes have amassed over 100,000 hours of high-voltage and filament-on time providing a significant source of operational statistics for high power, high-duty klystrons. Additionally, the SNS Radiofrequency (RF) Systems Group has developed operational methods to mitigate specific reliability challenges, such as cathode arcing and output power instability. Despite much progress, many of these challenges persist, prompting the SNS to update the procedures used for klystron processing as well as develop a higher throughput test stand.