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

Double Quarter-Wave

• “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