Critical design review #1 for medium beta cavity cryomodules 3-4 APRIL 2017 - main evolutions between M-ECCTD and serie - Bonjour, Franck Peauger, Je suis Ingénieur RF accélérateurs au SACM Je suis au CEA depuis janvier 2006

MAIN EVOLUTIONS Cavities with final choice of pickup antenna Possible adjustement of coupler length for Qx coupling adjustment Add of stiffeners on vacuum legs for transportation phase Possible change of He/He exchanger technology Part of instrumentation removed and “Rad compliant” components Rooting of the cables : cables length of instrumentation will be adapted to thermal behavior and to the lessons learned of the mock up assembly MLI & Magnetic shields adapted to the lessons learned of the mock up assembly Cryo-circuit will be compliant with interfaces and optimize after M-ECCTD RF tests Pumping port of the vacuum vessel and instrumentation connectors position Interface between cavities and Helium circuit (bi-metalic junction) Assembly tools Outline of the talk

Thank you Cryomodule overview, organization, development plan Commissariat à l’énergie atomique et aux énergies alternatives Centre de Saclay | 91191 Gif-sur-Yvette Cedex T. +33 (0)1 69 08 76 11 | F. +33 (0)1 69 08 30 24 Etablissement public à caractère industriel et commercial | RCS Paris B 775 685 019 03-04/04/2017