LATLAT CU Beam Test 3rd May 2006 1 GLAST Program CU Beam Test CU Integration Francesco...
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Transcript of LATLAT CU Beam Test 3rd May 2006 1 GLAST Program CU Beam Test CU Integration Francesco...
3rd May 2006 1 GGLASST Project
LAT
CU Beam Test
GLAST ProgramCU Beam Test
CU Integration
Francesco Bellardi [email protected] Saggini [email protected]
3rd May 2006 2 GGLASST Project
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CU Beam Test
Overview
Highlights of the INFN Integration Procedure: • Requirements
• Towers Integration
• CALs Integration
INFN CAL Integration MGSE:• Main feature
• Comparison with SLAC philosophy
• Proof Test
3rd May 2006 3 GGLASST Project
LAT
CU Beam TestHighlights of INFN Integration Procedure
LAT-PS-08132
• Requirements:– Critical components
• Part of the components of the CU are FLIGHT HARDWARE
• CAL: Cesium iodide crystals of calorimeter have an allowable relative humidity range of 35 to 50%. (Bagging and N2 flow at all times)
– Environmental• All operations will be performed in Class 100,000 Clean Room
• Electrostatic Discharge Control Per NASA-STD-8739.7
– Quality Assurance• Assembly and Inspection Data Sheet
• QC inspection at the completion of each assembly sequence
• Quality assurance will maintain surveillance of the operations required by this procedure
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• Towers Integration:• Performed according to LAT-PS-03058 - Tracker Integration Procedure
• Towers are integrated from above the 1x4 Grid in two adjacent bays towards one of the sides (Bays 2-3)
• TKR Tower to Grid interface Hardware (Studs and Cones) very well known by the INFN Integration Team (18 TKR Towers!!!)
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Highlights of INFN Integration ProcedureLAT-PS-08132
3rd May 2006 5 GGLASST Project
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• CAL Integration:• Different approach from that of LAT-PS-03027 - Calorimeter Integration & Processing
Procedure :
– CAL’s are integrated from underneath the 1x4 Grid instead of lowered into respective Bays.
Reasons:
» INFN Clean Room lacks necessary ceiling clearance
» No overhead travelling crane
– New MGSE and Procedure developed for this purpose
Challenges:
» Replicate same restraints and degrees of freedom during the entire operation
» Use consistent safety precautions for the hardware and personnel
» Adapt SLAC philosophy to INFN needs or absence of needs (e.g. CAL inversion)
» Optimize use of available space (INFN Clean Room is not devoted entirely to GLAST!)
» Maximize value of training performed at SLAC
Highlights of INFN Integration ProcedureLAT-PS-08132
3rd May 2006 6 GGLASST Project
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CU Beam Test
INFN CAL Integration MGSE
• Main Features:
X direction Table
Y direction Table
Vertical Drive Unit (Z direction)
Rotating Support Plates (θ angle)Thrust Ball Bearing,
Sphered Housing Washer (φ & ψ angles - small)
Torque Limiter
Z
YX
θ
ψφ
3rd May 2006 7 GGLASST Project
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CU Beam Test
INFN CAL Integration MGSE
• Comparison with SLAC philosophy:
SLAC INFN
Degrees of Freedom Allowed
6 – provided by overhead crane and suspension
6 – provided by the dedicated MGSE (see previous slide)
AlignmentProvided by SLAC
Alignment Tool and Rods
Provided by SLAC Alignment Tool and Rods
(shortened)
Mechanical Safety Feature
Proper travel of CAL monitored by Load Cell
Any overload is stopped by the Torque Limiter
Electrical Safety FeatureVoltmeter connected
between CAL and GridVoltmeter connected
between CAL and Grid
Different approach, same philosophy!!
3rd May 2006 8 GGLASST Project
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INFN CAL Integration MGSE
• Putting it all together:
3rd May 2006 9 GGLASST Project
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Proof Test
• Performed according to:• NASA-STD-8719.9 Standard for Lifting Devices and Equipment
• NASA-STD-5005A Ground Support Equipment • ASME B30.1 Jacks
• Load Applied:
•Tower Mass Simulator 123 kg +
•LAT-DS-06110 9 kg =
___________________________________________
Total 132 kg
Actual load (CAL+TEM/TPS) ~95 kg
3rd May 2006 10 GGLASST Project
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Proof Test
• Proof Load applied in the worst position for the structure
(midspan of Y-table)
• No appreciable distorsion or failure
Proof Test Successful!
3rd May 2006 11 GGLASST Project
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CU Beam Test
Conclusion
Ready for Integration – In any case we will perform a full dress reharsal of the procedure using non-flight material
But if anything goes wrong….
…we are outta here!!
Anywhere fun
darn!!