Performance of the H− Ion Source Supporting 1‐MW Beam Operations at SNS

The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory reached 1‐MW of beam power in September 2009, and now routinely operates near 1‐MW for the production of neutrons. This paper reviews the performance, operational issues, implemented and planned mitigations of the SNS H− ion source to support such high power‐level beams with high availability. Some results from R&D activities are also briefly described.