Fabrication Progress for LHC Superconducting Crab Cavities July 10, 2015

Outer conductor halves –4 halves etched, fixtured, and ready for weld 2 Double Quarter-Wave

3 “Top cake pans” –2 etched, and ready for weld Double Quarter-Wave

4 “Bottom cake pans” –2 etched, and ready for weld

Double Quarter-Wave 5 Cake pan assemblies: Ready for weld

6 “Bowls” –Complete –NbTi tuner attachment welds completed Double Quarter-Wave

7 Outer conductor halves –Gages being fabricated for profile measurements RF Dipole

8 Bowls: 4 stamped, final machining today RF Dipole

9 Stiffener: Niobium Stamped (machining in progress) RF Dipole

10 End cap: Niobium stamping in progress RF Dipole

11 RF Dipole Small HOM Box Side Port –2 in QA (4 halves)

12 FPC & HOM Box Port Halves All niobium parts stamped, trimmed, and QA’d. RF Dipole

13 RFD Beamtube with pickup port tube DQW Beamtube with pickup port tube Tubes have been welded Trim to length still need to be completed. RFD & DQW Tubes

14 RFD & DQW Tubes 16 flange assemblies preparing for braze 12 tube assemblies being welded