CRAB CAVITY WELDING Crab Cavity Project for Hi
CRAB CAVITY WELDING Crab Cavity Project for Hi. Lumi LHC Paula Freijedo & Thierry Tardy 07/03/16 …J-P. Brachet, M. Garlasche, L. Giordanino, R. Leuxe, L. Prever-Loiri, Rene Claret The Hi. Lumi LHC Design Study is included in the High Luminosity LHC project and is partly funded by the European Commission within the Framework Programme 7 Capacities Specific Programme, Grant Agreement 284404.
HOM-DQW: Samples to qualify the NIOBIUM welds & BCP process - W 050: Niobium thickness 2 mm. Welding for external side FE AFTER BCP (30µm) To simulate the real mass External side FE Internal side - W 010: Niobium thickness 3. 6 & 4. 2 mm. Welding for external side To simulate AFTER BCP (60µm) the real mass BEFORE BCP 4. 2 3. 6 External side Internal side Ø THE WELDING PARAMETERS FOR BOTH WELDS OK Ø BCP RESULTS (30 & 60) SATISFACTORY- IMPROVE THE LOOK OF WELDS 2
CAVITY-DQW: Samples to qualify the NIOBIUM welds. - Nb-Nb: W 03 A/B Final ellipsoidal welds : Welding in 3 mm of thickness performed on 1 side. Two configurations tested: Key (Clé) and BW (Bords droites) Results before BCP BW KEY INTERNAL SIDE - RF BOTH CONFIGURATIONS WITH SATISFACTORY RESULTS 3
- Nb-Nb: W 01 longitudinal in 4 mm Welding for external side + “lisage” for infernal side Ø THE WELDING PARAMETERS : OK FE TESTS ONGOING: - Test of tuning Interfaces: ü Nb-Nb. Ti & Nb-Nb both options will be tested Nb. Ti Nb 4
NEXT STEPS: - HOM: W 10&W 050 - CAVITY: W 03 A/B QUALIFICATION ACCORDING TO THE STANDARD EN-15613 (Before BCP): Pre-production welding test - QUALIFICATION ACCORDING TO THE STANDARD EN-15614 -11 (Before BCP): Welding procedure Test - MEASUREMENT OF THE SHRINKAGE - TEST TO SIMULATE THE FINAL WELDING CONDITIONS IN ORDER TO CHECK THE POSITIONING, TOOLING REQUIRED, ROTATION, HANDLING… - THE CONFIGURATION WITH THE BEST RESULTS IN TERMS OF QUALITY, LESS DEFORMATION, ETC. , WILL BE SELECTED FOR FINAL WELDING - QUALIFICATION ACCORDING TO THE STANDARD EN-15614 -11 (Before BCP): Welding procedure Test - MEASUREMENT OF THE SHRINKAGE - CAVITY: W 01 5
EDMS: https: //edms. cern. ch/document/1581039/1 6
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