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Overview

GLAST Program Beam Test Workshop CU Integration Francesco Bellardi francesco.bellardi@pi.infn.it Nicola Saggini nicola.saggini@pi.infn.it. Overview. Highlights of the INFN Integration Procedure: Requirements Towers Integration CALs Integration INFN CAL Integration MGSE: Main feature

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Overview

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Presentation Transcript

  1. GLAST ProgramBeam Test WorkshopCU 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 • Status of Hardware • Schedule

  3. Highlights of INFN Integration Procedure • 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 Procedure • TKR 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 Procedure • 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. INFN CAL Integration MGSE • Hardware Status: • Vertical Drive Unit: Here @ INFN ready for use • Torque Limiter: Here @ INFN ready for use • Thrust Ball Bearing: Here @ INFN ready for use • Profile Rail Guides and Carts: Here @ INFN ready for use • New Rotation Stand Wheels: Here @ INFN ready for use • X-Y Tables: In fabrication delivery in the first week of April • Vertical Drive Support Strct.: In fabrication delivery in the first week of April

  10. Schedule • Ready for MGSE Assembly by April 06 • Ready for Integration by May 02 • Milestones: • Delivery of 1x4 Grid by 03/27 • Delivery of remaining CAL and TKR units by 04/28 (does NOT include incoming tests etc. !!) • Delivery of Alignement Tools/MGSE retained by SLAC I&T by 05/02

  11. Conclusion If anything goes wrong…. Anywhere fun …we are outta here!! darn!!

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