Abstract
The Proton Power Upgrade initiative at Oak Ridge National Lab's Spallation Neutron Source aims to greatly boost the capability of proton beam power. This upgrade involves the integration of seven additional cryomodules, each housing four six-cell high-beta (β=0.81) superconducting radio frequency cavities. These cavities, manufactured and processed by Research Instruments in Germany, underwent meticulous treatment, including electropolishing as the bulk and final vital step. Upon delivery to Jefferson Lab, a total of 28 cavities for seven cryomodules, along with an additional four cavities for a spare cryomodule, underwent thorough vertical qualification tests, meeting the required specifications. Following cavity tanking and subsequent rf testing, the assembly of eight cryomodules was successfully executed, with all 32 cavities demonstrating compliance with acceptance criteria. The transportation of the cryomodule to SNS for high-power testing in the tunnel yielded exceptional results. Notably, the performance surpassed specifications, in terms of quality factor and accelerating gradient.
| Original language | English |
|---|---|
| Article number | 102001 |
| Journal | Physical Review Accelerators and Beams |
| Volume | 27 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 2024 |
Funding
We would like to acknowledge to all the technical staffs at Jefferson Lab who helped with processing and handling of the cavities under very difficult circumstances during the pandemic. We acknowledge the project team at SNS and Research Instruments for successful manufacturing and processing of cavities. The manuscript is authored by Jefferson Science Associate, LLC under U.S. DOE Contract No. DE-AC05-06OR23177.