Author: Favre, G.
Paper Title Page
TUPS100 Manufacturing the Linac4 PI-mode Structure Prototype at CERN 1774
 
  • G. Favre, A. Cherif, A. Dallocchio, J.-M. Geisser, L. Gentini, F. Gerigk, S.J. Mathot, M. Polini, S. Sgobba, T. Tardy, R. Wegner
    CERN, Geneva, Switzerland
  
  The PI-Mode Struc­ture (PIMS) of Linac4 con­sists of 7-cell cav­i­ties made from al­ter­nat­ing OFE cop­per discs and rings weld­ed to­geth­er with elec­tron beam (EB) weld­ing. A full-scale pro­to­type cav­i­ty of al­most 1.5 m in length has been man­u­fac­tured, as­sem­bled, and test­ed at CERN to pre­pare the se­ries pro­duc­tion of 12 PIMS cav­i­ties as part of an in­ter­na­tion­al col­lab­o­ra­tion. This paper re­ports on the con­struc­tion ex­pe­ri­ence in­clud­ing ma­chin­ing op­er­a­tions, EB weld­ing, vac­u­um braz­ing, and metro­log­i­cal mea­sure­ments re­sults.