Status of SNS Proton Power Upgrade SRF Cavities Production Qualification

Conference · Fri Apr 01 04:00:00 EDT 2022

DOI:https://doi.org/10.18429/JACoW-SRF2021-MOPCAV005· OSTI ID:1905535

Dhakal, P. ^[1]; Daly, E. ^[1]; Davis, G. K. ^[1]; Fischer, J. F. ^[1]; Forehand, D. ^[1]; Huque, N. A. ^[1]; Mitchell, A.L. A. ^[1]; Owen, P. D. ^[1]; Howell, M. P. ^[2]; Kim, S.-H. ^[2]; Mammosser, J. D. ^[1]

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1. Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)

The Pro­ton Power Up­grade pro­ject at Oak Ridge Na­tional Lab’s Spal­la­tion Neu­tron Source (SNS PPU) cur­rently being con­structed will dou­ble the pro­ton beam power from 1.4 to 2.8 MW by adding 7 ad­di­tional cry­omod­ules, each con­tains four six-cell high beta (\beta = 0.81) su­per­con­duct­ing radio fre­quency cav­i­ties. The cav­i­ties were built by Re­search In­stru­ments, Ger­many, with all the cav­ity pro­cess­ing done at the ven­dor site, in­clud­ing elec­trop­o­l­ish­ing as the final ac­tive chem­istry step. All 28 cav­i­ties needed for 7 cry­omod­ules were de­liv­ered to Jef­fer­son Lab, ready to be tested. The cryo­genic RF qual­i­fi­ca­tions and he­lium ves­sel weld­ing were done at Jef­fer­son Lab. The per­for­mance largely ex­ceed the re­quire­ments, and greatly ex­ceeded the per­for­mance of the orig­i­nal SNS cav­ity pro­duc­tion se­ries. Here, we pre­sent the sum­mary of RF test on pro­duc­tion cav­i­ties to this date.

• Research Organization: Thomas Jefferson National Accelerator Facility, Newport News, VA (United States); Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Science (SC), Nuclear Physics (NP)
• DOE Contract Number: AC05-06OR23177
• OSTI ID: 1905535
• Report Number(s): JLAB-ACC-21-3429; DOE/OR/23177-5250
• Country of Publication: United States
• Language: English