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Manus, R.

Paper Title Page
TPPT029 Fabrication of the Prototype 201.25 MHz Cavity for a Muon Ionization Cooling Experiment 2080
 
  • R.A. Rimmer, S. Manning, R. Manus, H.L. Phillips, M. Stirbet, K. Worland, G. Wu
    Jefferson Lab, Newport News, Virginia
  • R.A. Hafley, R.E. Martin, K.M. Taminger
    NASA Langley, Hampton, Virginia
  • D. Li, R.A. MacGill, J.W.  Staples, S.P. Virostek, M.S. Zisman
    LBNL, Berkeley, California
  • M. Reep, D.J. Summers
    UMiss, University, Mississippi
 
  Funding: This manuscript has been authored by SURA, Inc. under DoE Contract No. DE-AC05-84ER-40150, LBNL contract No. DE-AC03-76SF00098 and NASA contract IA1-533 subagreement #2

We describe the fabrication and assembly of the first prototype 201.25 MHz copper cavity for the muon ionization cooling experiment (MICE). This cavity was developed by the US MUCOOL collaboration and will be tested in the new Muon Test Area at Fermilab. We outline the component and subassembly fabrication steps and the various metal forming and joining methods used to produce the final cavity shape. These include spinning, brazing, TIG welding, electron beam welding, electron beam annealing and deep drawing. Assembly of the loop power coupler will also be described. Final acceptance test results are included. Some of the methods developed for this cavity are novel and offer significant cost savings compared to conventional construction methods.

 
TPPT081 Fabrication and Testing of the SRF Cavities for the CEBAF 12 GeV Upgrade Prototype Cryomodule Renascence 4081
 
  • C.E. Reece, E. Daly, S. Manning, R. Manus, S. Morgan, J.P. Ozelis, L. Turlington
    Jefferson Lab, Newport News, Virginia
 
  Funding: This manuscript has been authorized by SURA, Inc. under Contract No. DE-AC05-84ER-40150 with the U.S. Department of Energy.

Twelve seven-cell niobium cavities for the CEBAF 12 GeV upgrade prototype cryomodule Renascence have been fabricated at JLab and tested individually. This set includes four of the "Low Loss" (LL) design and eight of the "High Gradient" (HG) design. The fabrication strategy was an efficient mix of batch job-shop component machining and in-house EBW, chemistry, and final-step machining to meet mechanical tolerances. Process highlights will be presented. The cavities have been tested at 2.07 K, the intended CEBAF operating temperature. Performance exceeded the tentative design requirement of 19.2 MV/m cw with less than 31 W dynamic heat dissipation. These results, as well as the HOM damping performance will be presented.