GLAST LAT Project LAT Mgr’s Meeting 2005

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LAT Planning MeetingLAT Planning Meeting

Mechanical/Thermal Systems

March 17, 2005

Marc Campell

GLAST LAT Project LAT Mgr’s Meeting 2005

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Status Mar. 15, 2005Status Mar. 15, 2005

SLAC• Grid is ready for sell to I&T• Bonding of Grid Thermistors and fly away thermocouples

complete.• Shipped to B25 for fit up with Grid Perimeter ring.

GLAST LAT Project LAT Mgr’s Meeting 2005

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Status Mar. 15, 2005 (cont)Status Mar. 15, 2005 (cont)

Lockheed Martin• New contract for environmental testing of Radiators and X-LAT

Plate is in process.– Needs to be in place by Mar. 27 (end of existing contract)

• X-LAT plate assembly is 80% complete– Heat pipes matched drilled to plate– 4 of 6 bonded– ECD 3/31

• +Y Radiator panels fabrication is complete less edge taping and instrumentation installation.– ECD 4/14

• -Y Radiator fabrication is 85% complete. Final machining, bottom bracket bonding and instrumentation installation.– ECD 4/30

GLAST LAT Project LAT Mgr’s Meeting 2005

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X-LAT Plate Assy Fit CheckX-LAT Plate Assy Fit Check

Heat Pipes Ground Cooling Tube

RIT interface flange

GLAST LAT Project LAT Mgr’s Meeting 2005

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-Y Radiator Panel-Y Radiator Panel

RIT interface flange

LAT Mounting Point

Reservoir

GLAST LAT Project LAT Mgr’s Meeting 2005

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MECH MilestonesMECH Milestones

GLAST LAT Project LAT Mgr’s Meeting 2005

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Threats to RFIThreats to RFI

• LM X-LAT & Radiator delivery have no float.• Radiator

– First time use of bonding/assembly tool & procedures. There have been Discrepancies at each step along the way. MFG schedule and marching army costs.

– Potential cost over runs in testing• Vibration/Acoustic tests

– Fixture design

– Instrumentation requirements

• Final test plan for thermal vacuum.– Investigating an alternative chamber.

• Timely resolution of test anomalies.