Overview

1. GLAST ProgramCU Beam TestCU IntegrationFrancesco Bellardi francesco.bellardi@pi.infn.itNicola Saggininicola.saggini@pi.infn.it

2. Overview • Highlights of the INFN Integration Procedure: • Requirements • Towers Integration • CALs Integration • INFN CAL Integration MGSE: • Main feature • Comparison with SLAC philosophy • Proof Test

3. Highlights of INFN Integration ProcedureLAT-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

4. Highlights of INFN Integration ProcedureLAT-PS-08132 • 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!!!) 2 3

5. Highlights of INFN Integration ProcedureLAT-PS-08132 • 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

6. INFN CAL Integration MGSE • Main Features: Rotating Support Plates (θ angle) Thrust Ball Bearing, Sphered Housing Washer (φ & ψ angles - small) Vertical Drive Unit (Z direction) Z θ φ ψ Torque Limiter X Y Y direction Table X direction Table

7. INFN CAL Integration MGSE • Comparison with SLAC philosophy: Different approach, same philosophy!!

8. INFN CAL Integration MGSE • Putting it all together:

9. Proof Test • Performed according to: • NASA-STD-8719.9 Standard for Lifting Devices and Equipment • NASA-STD-5005A Ground Support Equipment • ASME B30.1Jacks • Load Applied: • Tower Mass Simulator 123 kg + • LAT-DS-06110 9 kg = • ___________________________________________ • Total 132 kg • Actual load (CAL+TEM/TPS) ~95 kg

10. Proof Test • Proof Load applied in the worst position for the structure • (midspan of Y-table) • No appreciable distorsion or failure Proof Test Successful!

11. 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…. Anywhere fun …we are outta here!! darn!!