Speaker
Description
Waste beam from the Spallation Neutron Source’s (SNS) injection process is steered to the Ring Injection Dump (RID). The history of the design and installation of the RID is convoluted and included late design changes requiring post-installation machining. In 2023, the RID proton beam window and beamstop were replaced, in part to support the installation of the RID Imaging System, which required a luminescent coating on the RID proton beam window. The replacement activities experienced numerous complications due to damage from corrosion but ultimately concluded with a successful vacuum leak check. Since resuming operations in summer 2023, a leak has developed at the RID window, which is being mitigated until the window can be replaced again and the sealing surface damage addressed (currently anticipated to occur in Summer 2027). This presentation will discuss the complexity of the RID, the impacts of the helium leak, the various mitigation approaches implemented, and remaining mitigation possibilities.