Fabrication Progress for LHC Superconducting Crab Cavities April 17, 2015

Outer conductor halves –4 halves in QA 2 Double Quarter-Wave

3 “Top cake pans” –2 in QA Double Quarter-Wave

4 “Bottom cake pans” –2 in QA

Double Quarter-Wave 5 Cake pan assemblies

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

7 “Cake pan & bowl” stackup Double Quarter-Wave

8 Outer conductor halves –4 in QA RF Dipole

9 Small HOM Box Side Port –2 in QA (4 halves)

10 End cap: Niobium stamping in progress RF Dipole

11 FPC & HOM Box Port Halves Waiting for finalization of end cap prototype RF Dipole—copper prototypes

12 Bowl: Machined copper for stackup RF Dipole—copper prototypes

13 Stiffener: Machined for stackup RF Dipole—copper prototypes

14 Bowl Stiffener Outer Conductor