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]


LAT

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


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


LAT

CU Beam Test

• 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!!!)

23

Highlights of INFN Integration ProcedureLAT-PS-08132


LAT

CU Beam Test

• 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


LAT

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


LAT

CU Beam Test


• 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!!


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CU Beam Test


• Putting it all together:


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CU Beam Test

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


LAT

CU Beam Test

Proof Test

• Proof Load applied in the worst position for the structure

(midspan of Y-table)

• No appreciable distorsion or failure

Proof Test Successful!


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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!!

latlat cu beam test 3rd may 2006 1 glast program cu beam test cu integration francesco...

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