Task List for Phase II Rotatable Collimator Project at SLAC

30 January 2007CERN/LARP Video Meeting

Tom Markiewicz/SLAC

BNL - FNAL- LBNL - SLACUS LHC Accelerator Research Program

LARP/CERN Video Mtg. - 30 January 2007 Rotatable Collimators - T. MarkiewiczSlide n° 2 / 5

Steps on Path to a Thermal Test of a Full Length Cooled Jaw:

#1 Test Pieces

Braze Test #1 Wind any available 10mm x 10mm tubing on convenient sized and available

copper stock for mandrel and jaws Develop and document braze procedures Section for braze inspection, document results

Coil winding Procedure and hardware Develop procedure and tooling to wind available tubing on short 200mm length

Aluminum mandrel Test 3-axis CNC milling procedure required to machine U-bend in cooling pattern

Braze Test #2 Machine short 200mm copper mandrel Wind annealed available tubing on copper mandrel and stake in place to hold Braze tubing to mandrel Machine OD and add groove to hold braze wire Machine 4 quarter 200mm jaws Braze jaws with wire & foil– Vacuum test for virtual leaks– Section for braze inspection, document results

LARP/CERN Video Mtg. - 30 January 2007 Rotatable Collimators - T. MarkiewiczSlide n° 3 / 5

Braze Test #3

Fab a 2nd 200mm mandrel on CNC milling machine with space on downbeam end for U-bend

• Test wind coil with downstream U-Bend

• Braze coil

• Braze 4 quarter round jaws (more practice needed)

• Under discussion: use 8 quarter round jaw sections to make sure butt brazes pose no problem (as promised)

LARP/CERN Video Mtg. - 30 January 2007 Rotatable Collimators - T. MarkiewiczSlide n° 4 / 5

Should We Consider a <1m Jaw Protected by a non-rotating absorber for Improved Performance under Thermal Load?

LARP/CERN Video Mtg. - 30 January 2007 Rotatable Collimators - T. MarkiewiczSlide n° 5 / 5

Is this a better way to use the available space or slots?

collimatorabs

1 m

10?

Or, can we consider using a “empty” upbeam slot for such a protective absorber?