LARP Phase II Secondary Collimator RC1

1
LARP Phase II Secondary Collimator RC1

• Collimator Development and Test Program Status
• Revised 1/30/07

2
Outline

• Winding and Misc Tests update
• Braze Test plan forward
• Thermal Test (Prototype Hardware) and Test Lab
  update
• RC1 progress and near term plans

3
Winding and Misc Tests update

• 10mm sq. OD/ 7mm sq. ID copper sample was bent
  into 10mm and 35mm radius configurations to check
  for distortions.
• Tube deformation inward (relative to Mandrel OD)
  as a result of winding is consistent with ANSYS
  results (about 0.2mm) for the 35mm radius bend.
• Still on the list
• Twist to failure for a measure of the margin of
  safety.
• Twist to determine maximum torque requirements.
• Section all samples to inspect for internal
  distortion shapes and smoothness of transitions.
  

4
Braze Test update and plan forward

• Klystron Manufacturing Braze Shop completed Jaw
  brazing onto the 200mm long Mandrel on 12/19/06.
• Assembly is scheduled for vacuum bake and pump
  down testing in February.
• Bake temperature and duration per CERN Phase 1
  specs?
• Hope to get info on magnitude of virtual leaks.
• Will section Jaw and Mandrel for inspection after
  vacuum testing.

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Completed 200mm long Mandrel and Coil
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More Braze development tests planned

• A second 200mm long Copper mandrel has been
  fabricated for more Jaw brazing tests.
• 4 of the 200mm long Jaws have been halved to
  100mm long to practice transverse joint brazing.
• Cooling coil will be rolled into groove with ends
  extending through shaft for rolling process
  development.
• Molybdenum to copper braze joint detail drawings
  have been released for fabrication.
• No date promised yet, SLAC and vendor shops to
  fabricate parts.

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Mo-Cu Braze Joint configuration

1 - Mandrel Dummy 2 - Mo Shaft Dummy 3 - Mo
Backing Ring 4 - Cu Hub
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Single Jaw Thermal Test Hardware Progress

• Clean Tent infrastructure upgrades complete.
• Jaw 1/4 sections (qty 24) now at SLAC.
• Full length Mandrel in fabrication at local
  vendor.
• Mid February date promised.
• Central bore machining details on hold pending
  Mo-Cu Hub joint braze test results.
• Jaw Cooling supply and return piping assembly
  nearing completion.

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Jaw Cooling Piping
FLOW METER
THERMOCOUPLE WELL
TO JAW
FLOW CONTROL
FROM CHILLER
BYPASS
TO CHILLER
FROM JAW
FLOW SWITCH
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RC1 progress and near term plans

• 3D models have been developed for prototypes of
• U-Joint Drive Axle.
• One piece diaphragm, integral with axle, worm
  gear and bearing preload features.
• End Support.
• Bearing housing holds Axle rigid in gravity
  direction for 0 deg., 90 deg., and skew
  collimator orientations yet provides compensation
  in axial direction for required thermal
  expansions of Jaw and Shaft.
• Rotator mechanism.

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U-Joint Drive Axle

0.5mm thick diaphragm
30mm dia. shaft o.d.
Diaphragm deforms 0.0018 radians to compensate
for shaft sag and slewing of end supports
80 tooth worm gear
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End Support (water cooled)
Tube clamp reacts torque but can flex to
compensate for Jaw thermal expansion
tube shortening due to twist
Bearing Mount supports the gravity load but can
flex to compensate for Shaft thermal expansion

Rotation axis
Weld to bellows base plate at top assy
Squirt tube water cooling manifold
Surfaces have high emissivity coating to aid
cooling
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Rotator Mechanism