1. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 1 GLAST Large Area Telescope: MGSE Status Report Eric Gawehn SU-SLAC I&T MGSE Engineer egawehn@slac.stanford.edu 650-926-3622 Gamma-ray Large Area Space Telescope

2. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 2 MGSE Overview Total of about 30 MGSE items to be produced for LAT integration Hardware –In this presentation only the main items will be addressed LAT Rotation Stand LAT Support Fixture for the Grid Perimeter Ring (GPR) LAT Transport Container 90º Support for Van de Graaff (VDG) Tests –Remaining MGSE items are about 50% complete Drawings –Critical Path Detail Drawings are 70% complete (goal is to have all finished by Design Review) –Detailed drawings are 50% complete Remainder is being held up until formal stress analysis is completed

3. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 3 LAT Rotation Stand – Personnel Access Platform Design Philosophy –Provide more parallel work area in the Integration Hall –Minimize mechanical preparation for Flight work Ops Status –Two Concepts for Personal Access Platform are completed ( no major issues at this point) Primary minimizes impact to work area, but adds about $17K to Rotation Stand (delays final dwgs by ~ 15 days Second impacts work area and time for mechanical preparation Ops and may cost ~ $8K Issues –See Concept Views Views do NOT imply detail dwg maturity; much work to do

4. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 4 2,743 mm [ 108 inches ] Wide 4,420 mm [ 174 inches ] Long LAT Rotation Stand Interference with Grid Perimeter Ring is now being worked out

5. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 5 Heater Control Box Connector Clearance Heater Control Box Connectors Shown De-Mated 0.87” This Connector May Require a 90º Strain Relief Grid Perimeter Ring to Grid Bracket Grid Perimeter Ring - Z

6. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 6 GPR with Heater Control Box Side View

7. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 7 A-Frame Rotation Stand with Low Cost PAP* * PAP – Pesonnel Access Platform

8. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 8 A-Frame LAT Stand with Low Cost PAP B-33, Rm 104 Integration Hall Crane Structure B-33 Beam; Not in Rm Top Looking Down View LAT A-Frame Integration Stand Low Cost Stand Takes Up Most of the Rm

9. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 9 Refined Rotation Stand with PAP

10. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 10 Box Frame Stand with PAP, Small

11. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 11 LAT Support Structure; GPR Design Philosophy –Bolt together frame with fairly precise bracketry Status –Concept is well understood –Stress Analysis completed and shows compliance to EWR 127.1 ( > 5 x against Ultimate ) The bracket clevice analysis needs 1 final iteration Issues –Interference with heater control box connector is resolved Need to assess access for removal of Clevice Pin

12. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 12 GPR Complete Image in work

13. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 13 LAT Transport Container Design Philosophy –Attempting to fit in 88” Truck Taller and more narrow version adds $20-30K for engineering and mass plate –Have a concept that works but requires additional ~ $20K for non-std truck width for cross-country ride to NRL Isolation system appears satisfactory Work in progress –Layout is in work; may not be available next week –Vibration report by next week – (First Iteration, expect another iteration for final design to follow) Issues

14. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 14 Other Important Items Vibration Test Fixture –Have SC Bracket Dwg; We are building model –Stress indicates four small interface brackets to NRL shaker will work No need for $20K large interface plate Environmental Tests @ NRL –Expect MGSE Concept for TVAC and EMI ready for presentation next week ( detail dwgs ~ 80% complete ) –Need feedback from NRL NRL needs to define Cold / Hot Plate Heat Exchanger Sizing and plumbing Need sizes to determine if Heat Ex’rs can be safely slid into place ( Eric believes they can ) Single Tower Airplane Test –MGSE on hold until PAP is more mature Can be worked if additional designer is available

15. GLAST LAT Project I&T Meeting – Jan 29,2004 E. Gawehn 15 Summary Need Authorization to Proceed for: –Purchase of long lead items GPR frame pieces GPR to Grid attach bracketry Support Shaft Materials and Machining Bearings Rotation Drive, Flex Coupling & Drive Motor –Rotation System Weldment –LAT Lift Spreaders Z Axis Vertical (analysis in work) Z Axis Horizontal (analysis in work) –Proof Test Hardware Design to begin after GPR ATP