GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 1 I & T Responsibility LAT I&T, Verification, and Calibration Flow VibeRandom vibrate/sine sweepAccAcceptance test level AcAcousticQUQualification Unit T-CThermal-cycle at 1 atmosphereEMEngineering Model T-VThermal-vacuum cycle testTMThermal model EMIElectro-magnetic interference testCUCalibration Unit FUFlight Unit Calibration unit I&TCalCalibration Flight unit/spares I&TFS Flight Spare I&T: Beam test CU – 4 towers Cal Elec: EM2 Elect. Modules, SIS TKR: QU FS from TKR fab CAL: F1-2 from CAL fab CAL: QU- FS from CAL fab TKR: F1-2 from TKR fab Calibration Unit - CU Obs: Support Vibe/Ac Acc Obs: Support T-V Acc Obs: Support EMI Acc I&T: LAT Assembly, Test Acc, Cal Elec: Flt Elec. Mod. to LAT I&T CAL: F3-16 from CAL fab TKR: F3-16 from TKR fab Mech: Flt Grid from Mech ACD: ACD to LAT I&T Flight LAT - FU I&T: LAT Functional, Thermal, Airborne cosmic E to E Acc, Cal, T-C TKR/CAL: F1,2 from CU I&T: LAT Environmental Tests Acc, Cal, T-V Elec: SIU Mech: Flt Rad’s from Mech

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 2 Require ment TitleParameterVerification Method Particle Tests Relevant to Verifying the Requirement Energy-Range/ Effective Area > 300 cm 20 MeV >3000 cm 100 MeV >6400 cm 300 GeV Test + MC, Analysis. Van de Graaff 17.6 MeV photons  Tagged photons 20 to 1500 MeV, norm incidence. Brem beam, simultaneously all  energy bins from 20 MeV to 28 variety of angles and positions Photon Energy Resolution (normal incidence)  50 % 20–100 MeV  10 % 1-10 GeV  20% GeV Test + MC, Analysis. Van de Graaff 17.6 MeV photons  Tagged photons 20 to 1500 MeV, norm incidence. Positrons 1, 2, 5, 10, 28, 45 variety of angles and positions Peak Effective Area>8000 cm 2 Test + MC, Analysis. Brems beam, simultaneously all  energy bins from <20 MeV to 28 variety of angles and positions Single Photon Angular Resolution – 68% (on- axis) 100 MeV < 3.5° front, < 6° back GeV < 0.15° front, < 0.3° back Test + MC, Analysis. Brems beam, simultaneously all  energy bins from <20 MeV to 28 variety of angles and positions. Tagged photons 20 to 1500 MeV, norm incidence. LAT Science Requirements Verification Matrix (Examples) Requirements for Beam Tests flow down from LAT Science Req. Doc – Level II Specification LAT-SS-00010

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 3 EM Deliverables to I&T ACD – none TKR - one full size mechanical module and a four-tray module fully instrumented with cables and electronic readout (mini-tower), TKR lift fixture, preliminary functional test scripts CAL – fully instrumented module, preliminary functional test scripts ELX/I&T - EGSE – EM1 version ME/I&T - 1 x 4 support grid SAS/I&T - GLEAM Monte Carlo, calibration algorithms

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 4 TestPurposeDatesObservers/Users CAL alignment TEST MGSE Prototype CAL Mockup November 14, 2002I&T CAL EGSE integration Test Integrated EGSE SystemDecember 2002I&T ELX TKR readout Test TKR-TEM integration EGSE test code validation January, 2003I&T TKR TKR alignment TEST MGSE Prototype TKR Mechanical EM April 2003I&T TKR CAL integration Test CAL-TEM integration EGSE test code validation April 2003I&T CAL TKR-CAL integration Test System integration EGSE test code validation May 2003I&T System Engineering Calibration and data analysis Muon Calibration/Survey Van de Graaff calibration test (methods and procedures) May 2003I&T SAS EM Planned Tests

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 5 EM GSE Schedule GSE ItemPurposeDate Available Cal alignment toolCal alignment testOctober 2002 (Done) Cal external features modelCal alignment testOctober 2002 (Done) Grid Bay modelCal alignment testOctober 2002 (Done) Cal Lift/Alignment SlingCal alignment testOctober 2002 (Done) EM Grid Rotation StandEM Assembly Support FixtureJanuary 2003 Tracker Lift Fixture (from TKR) Tracker alignment testApril 2003 EM1 Electronics (from ELX)Readout of EM dataDecember 2002 Van de GraaffProduce low energy photonsJanuary 2003 scintillatorsVeto charged particlesJanuary 2003 Cal Lift SlingLift Cal out of shipping containerApril 2003 Cal RotatorRotate Cal upside-downJanuary 2003

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 6 SVAC’s Plans for the EM Requirements (LAT-MD – SVAC Plan) –Test low-level calibration algorithms for CAL and TKR with an integrated tower, –Test and refine the SVAC database design necessary for the CU activities, –Test and refine quality check histograms necessary to validate MC simulations, –Test the geometry implementation in the SAS reconstruction software that will be used for the CU activities Additional Goals (LAT-SS – SVAC EM Plan) –GLEAM MC Compare raw distributions –Prototype data analysis algorithms Energy Resolution for 17.6 MeV 

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 7 LAT I&T MGSE Q4 Progress Completed Design, Fabrication and Inspection of Calorimeter “Installation from above” concept hardware –Performed dry run of alignment installation demonstration No Problems –See photos on next charts Generated some new concepts for MGSE intended for flight integration –Too preliminary to discuss Near term focus, after completion of Cal Installation Demo, will be EM Hdwr; No issues foreseen –EM-Calorimeter Rotation / Support Stand (Design 40% Complete) –1 x 4 Grid Support –1 x 4 Grid Lift Fixture –Possible need for an EM Shipping Container (very low cost) –Van de Graaff Support Stand (Design 70% Complete)

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 8 Online Migration EM-1: No FSW beyond hardware drivers –Will be used for the EM test (Functional testing, Calibration - cosmic rays, Van de Graaff photons) EM-2: Development platform for multi-tower support –Embedded systems run FSW code –Commanding will be done through a more realistic dictionary –Event format changes from TEM/AEM output style –Test bench scripts will still be able to be run CU: Four tower system used for the Beam Test at SLAC –No ACD subsystem software planned. –Evolution of EM-2 –Will need to handle external sources of data –1553, SSR and SIS communications not required to satisfy test –Test bench scripts will still be able to be run FU/LAT: The complete system –Communications only through SIS, 1553 and SSR –Will need IOC/MOC-like interface –Test bench scripts will not be able to be run

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 9 Integration Facility Schedule/Status Building 33: –Cleanroom AC upgrades and ESD tile repairs completed, accepted –All monitoring equipment received by Nov.25 –Commission monitoring equipment by Dec.10 –Fire protection upgrade (dry pipe) complete Dec. 20 –Final lock-down w/ omni locks, start cleanroom procedures by January 15.

GLAST LAT ProjectMini-Review, 30 January 2003 LAT-PR-#####-## 10 I&T Top Issues and Risks EM – Delivery of subsystem parts and scripts. –Impact: Less progress before CDR. –Mitigation: I&T will do what we can before CDR and continue work afterward. –Status: Preparing for a very tight schedule. Final LAT test requirements. –Impacting I&T test plan development and MGSE development. –Plan for more inclusive set of tests. –Working to develop test plans to the extent possible at this time. EGSE Executive trade-online. –Potential ITAR issues. Risk of impacting budget and schedule. –Develop in-house, open source, non ITAR restricted, EGSE. –Proceeding with in-house, open source, non ITAR restricted, EM-1 EGSE.