1. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 1 GLAST Large Area Telescope: Electronics, Data Acquisition & Instrument Flight Software Peer Critical Design Review March 19-20, 2003 Gunther Haller Stanford Linear Accelerator Center Manager, Electronics, DAQ & FSW LAT Chief Electronics Engineer haller@slac.stanford.edu (650) 926-4257 Gamma-ray Large Area Space Telescope

2. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 2 CDR Agenda Day 1 - March 19 (all times PST) Section 1: Electronics, DAQ, FSW Overview 8:00 – 8:40 Section 2: Management8:40 – 9:20 Section 3: System Engineering 9:20 – 10:30 BREAK10:30 – 10:45 Section 4: Electronics 10:45 – 12:00 LUNCH12:00 – 13:00 Section 5: Instrument Software Overview13:00 – 13:30 Section 6: Instrument Software I13:30 – 14:45 BREAK14:45 – 15:00 Section 7: Instrument Software II15:00 – 15:30 Section 8: Instrument Software III15:30 – 16:15 Discussion16:15 – 17:00

3. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 3 CDR Agenda (Con’t) Day 2 - March 20 Section 9: Mechanical & Thermal8:00 – 9:00 Section 10: Power - EMI9:00 – 9:30 Section 11: Monitoring & Thermal Control9:30 – 10:00 BREAK10:00 – 10:10 Section 12: EEE Parts10:10 – 10:40 Section 13: Manufacturing 10:40 – 11:10 Section 14: Summary11:10 – 11:20 Discussion/Closeout11:20 – 12:00 Adjourn12:00

4. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 4 Review Board Team Hartmut Sadrozinski/UCSCChairman Al Vernacchio/GSFCCo-Chairman - GLAST Deputy Project Manager Fred Huegel/GSFCElectrical Engineering John Fox/SLACElectrical Engineering - Applied Physics Steve Smith/SLACElectrical Engineering – System Engineering Bob Jackobsen/LBLSoftware Rick Schnurr/GSFCSoftware Lowell Klaisner/SLACLAT Chief Engineer Steve Scott/GSFCSystems Engineering Ron Zellar/GSFCSoftware

5. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 5 GLAST Large Area Telescope: Electronics, Data Acquisition & Flight Software Overview Gunther Haller Stanford Linear Accelerator Center Manager, Electronics, DAQ & FSW LAT Chief Electronics Engineer haller@slac.stanford.edu (650) 926-4257 Gamma-ray Large Area Space Telescope

6. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 6 Overview Outline Overview of LAT and Electronics Level III Requirements Summary Meeting Key Requirements Flowdown – Requirements to Design Design Evolution Optimization Technical Heritage Status of July  PDR Recommendation Items

7. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 7 e+e+ e–e–  Overview of LAT Precision Si-strip Tracker (TKR)Precision Si-strip Tracker (TKR) 18 XY tracking planes. Single-sided silicon strip detectors (228  m pitch) Measure the photon direction; gamma ID, ~880,000 channels. Hodoscopic CsI Calorimeter(CAL)Hodoscopic CsI Calorimeter(CAL) Array of 1536 CsI(Tl) crystals in 8 layers. Measure the photon energy; image the shower. Segmented Anticoincidence Detector (ACD)Segmented Anticoincidence Detector (ACD) 89 plastic scintillator tiles. Reject background of charged cosmic rays; segmentation removes self-veto effects at high energy. Electronics SystemElectronics System Includes flexible, robust hardware trigger and software filters. Systems work together to identify and measure the flux of cosmic gamma rays with energy 20 MeV - >300 GeV. Calorimeter Tracker ACD [ surrounds 4x4 array of TKR towers] DAQ Electronics

8. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 8 LAT Electronics 16 Tower Electronics Modules –DAQ electronics module (DAQ-EM) –Power-supplies for tower electronics * Primary & Secondary Units shown in one chassis 3 Event-Processor Units (2+1 spare) –Event processing CPU –LAT Communication Board –SIB Spacecraft Interface Unit –Spacecraft Interface Board (SIB): Spacecraft interface, control & data –LAT control CPU –LAT Communication Board (LCB): LAT command and data interface Power-Distribution Unit (PDU)* –Spacecraft interface, power –LAT power distribution –LAT health monitoring Global-Trigger/ACD-EM/Signal-Distribution Unit* TKR CAL TKR Front-End Electronics (MCM) ACD Front-End Electronics (FREE) CAL Front-End Electronics (AFEE)

9. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 9 Specification Tree

10. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 10 Level III Key Requirements Summary Electronics Ref: LAT-SS-00019

11. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 11 Level III Key Requirements Summary (2) Power System Ref: LAT-SS-00136

12. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 12 Flowdown – Requirements to Design

13. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 13 Evolution of DAQ Design Proposal Design: No global trigger, ability to reduce hardware trigger rate from tracker marginal Data router to move partial event fragments into central processor Event building in software 16 processors, one on each tower to process data Communication to TKR/CAL/ACD systems very unique Current Design: Global trigger, ability to reduce hardware trigger rate from tracker Event building in hardware Data switch to move complete event fragments from hardware event builder to processor 2 processors for event processing Communication to TKR/CAL/ACD systems unified

14. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 14 Optimization – Summary Serial LVDS (Low-Voltage-Differential-Swing) protocol with Data, Clock, Reset, Return-Data to each front-end system and between DAQ modules (see LAT-TD-00606) Buffering of event data fragments at each module stage to meet dead-time requirements –TKR front-end -> TEM -> Event-Builder -> LAT Communication Board -> CPU -> Spacecraft Solid-State Recorder Flow-control between buffer stages to meet non-overwriting and data consistency requirements Utilization of ASIC’s to meet volume, power, and cost constraints

15. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 15 Heritage Similar data-acquisition system was used on balloon flight (TEM, one event-processing CPU, one spacecraft-interface- equivalent control CPU) Electronics components: mostly components with flight- heritage (FPGA’s, LVDS converters, memories) ASIC technology same as for tracker, calorimeter, ACD systems Trigger, dataflow, event assembly, and event filter processing very similar to past high-energy physics experiments

16. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 16 Summary of July Delta-PDR Review “The electronics including software was already baselined at the January PDR review” “Work with GSFC branch to qualify poly-switches for use in the LAT electronics” –Approved “Ensure that FPGA design practices adhere to GSFC guidelines and recommendations for space-flight applications” –Working with Rich Katz at GSFC to review LAT FPGA designs. In process of sending designs to GSFC for review

17. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 17 Summary of July Delta-PDR Review (Con’t) “Determine the need date for processor down-select based on software design impact” –Have selected BAE RAD750 “Finalize the flight-software management plan and test plan” –Flight software management plan (LAT-MD-00104-02) entered into cyberdocs 6 November 2002 –Flight software test plan (LAT-TD-00786-01) entered into cyberdocs 10 June 2002

18. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 18 Summary of July Delta-PDR Review (Con’t) “Identify solution path to replace the functionality that would have been provided by SCL COTS tool in the flight software. Coordinate with I&T and mission operations” –I&T has adopted a low level toolset (Python, Qt, XML, MySQL) to implement the EGSE side of the I&T test environment. FSW provides the hardware drivers for the embedded system. Code already exists and is running on test stands to replace the SCL register manipulation model. FSW has adopted the I&T low level toolkit for its Test Executive.

19. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 19 GLAST Large Area Telescope: Electronics, Data Acquisition & Flight Software Management Gunther Haller Stanford Linear Accelerator Center Manager, Electronics, DAQ & FSW LAT Chief Electronics Engineer haller@slac.stanford.edu (650) 926-4257 Gamma-ray Large Area Space Telescope

20. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 20 Management Outline Team Leads Team Partners Contingency (Mass, Power, Cost) Organization Chart Work Flow Testing Overview Fabrication Plan Schedule & Critical Path Cost Procurements Configuration Management Issues and Concerns Summary

21. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 21 Team Leads Gunther Haller –Project Manager Electronics, DAQ, Instrument Software –Chief Electronics Engineer –PCMS Schedule & Cost Lead JJ Russell –Instrument (Flight) Software Lead Mike Huffer –Data-Acquisition System Lead Dave Nelson –Mechanical & Thermal Engineering Lead –I&T Lead –Power/EMI System Lead Jobe Noriel –Packaging Engineering Lead Jerry Clinton –Manufacturing Lead Nick Virmani/Darren Marsh –Mission/Quality Assurance

22. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 22 Team Partners Naval Research Lab –Spacecraft interface board (Silver Engineering) –Instrument flight software (Boot Code, SC Interface) –CAL front-end electronics University of Santa-Cruz –Tracker front-end electronics Goddard Space Flight Center –ACD front-end electronics

23. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 23 Contingency Handling All contingency (Power, Mass, Cost) is held at LAT project level Change requests to LAT Change Control Board are required to account for variance 4.1.7 Changes which required increase in cost, mass, power: Change Request #DescriptionStatus LAT-XR-01242Flight Software Labor Increase (SLAC) Approved LAT-XR-01753Flight Software Labor Increase (NRL) Approved

24. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 24 Organization Charts Section 7.4 Elec, DAQ, Flt SW Overview Reliability D. Nelson SU-SLAC WBS 4.1.7.2 Quality Assurance D. Marsh/N. Virmani SU-SLAC/NRL WBS 4.1.7.2 DAQ M. Huffer SU-SLAC WBS 4.1.7.4/4.1.7.5 Enclosures/Harness M.Freytag SU-SLAC WBS 4.1.7.7/4.1.7.8 Power System D. Nelson SU-SLAC WBS 4.1.7.6 Instrument Software J. Russell SU-SLAC WBS 4.1.7.9 GSE & Operation M. Huffer SU-SLAC WBS 4.1.7.A Instrument I&T G. Haller SU-SLAC WBS 4.1.7.C Tracker Elex WBS 4.1.4 CAL Elex WBS 4.1.5 ACD Elex WBS 4.1.6 Front-End Elex G. Haller SU-SLAC Electronics, DAQ & Flight Software G. Haller SU-SLAC WBS 4.1.7

25. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 25 Development Testing LAT System Processor: Motorola Power-PC Flight Software LAT COM engineering modules for –LAT Communcation –Trigger TEM DAQ Assembly TEM Power-Supply Assembly 28-V Supply LAT-TD-00861 Tower Power Supply Assembly (1.5V/2.5V/3.3V/ 0-100V/0-150V) TEM DAQ Assembly COM-card 1: LAT Communication Module COM-card 2: Trigger Module 28-V Power Supply Power-PC Processor Flight Software

26. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 26 Testing Plan ASIC’s are 100% acceptance tested before assembly on boards –Radiation performance is lot tested for single event effects and total ionizing radiation. Function/Performance is tested at the board level Qualification and acceptance tests including performance, vibration, EMI/EMC, and thermal vacuum are performed at the component sub-assembly (box) level.

27. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 27 Fabrication Plan ASIC’s –Design: SLAC –Fabrication: Agilent –Packaging: ASAT Printer-Circuit Boards –Design: Spacecraft Interface Board: Silver Engineering All other DAQ custom modules: SLAC –Fabrication: qualified vendor –Parts procurements: SLAC –Assembly: qualified vendor Enclosures –Design: SLAC –Fabrication: qualified vendor Module Assembly (PCB’s/cables/enclosure) –Design: SLAC –Assembly: qualified vendor Tower Power Supplies –Circuit & board design, fabrication, assembly: qualified vendor –Enclosure design: SLAC –Assembly: qualified vendor Harness –Design: SLAC –Assembly: qualified vendor Installation at SLAC

28. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 28 Work Flow TEM DAQ Assembly TEM DAQ Board GCCC, GTCC ASICs TEM DAQ Enclosure TEM PS Assembly TEM PS Board TEM Power Supply Enclosure GASU Assembly GASU DAQ BoardGLTC ASIC GASU Enclosure PDU Assembly PDU DAQ BoardGLTC ASIC PDU Enclosure SIU Assembly SIB Board Crate Enclosure LCB Board CPU Board PS Board EPU Assembly Harness TEM Assembly LAT Integration 1 st stage Acceptance Test GLTC ASIC Acceptance Test LAT Integration 2nd stage LAT Integration 3rd stage First layer DAQ modules Second layer DAQ modules Add Harness Software Acceptance Test

29. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 29 Key Milestones

30. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 30 Key Milestones

31. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 31 Critical Path TEM DAQ Assembly –Flight TEM DAQ PC Board fab and loading Feb 04 Requires flight TEM ASICs Tower Power Supplies –Flight assemblies by March 04 Is out for RFP, expected back March 25 –Depends on vendor response

32. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 32 Cost by Fiscal Year FY00 in K$ FY01 in K$ FY02 in K$ FY03 in K$ FY04 in K$ FY05 in K$ Total in K$ 6929301,7277,0134,0971,28115,737 W.B.S. 4.1.7 without contingency

33. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 33 Cost Contingency and Schedule ItemIn k$ Budget at Complete (a)15,737 Contingency at Start*2,83018% of (a) Budgeted Cost for Work Scheduled (b)4,206 Budgeted Cost for Work Performed4,148 Actual Cost for Work Performed4,238 Cost Variance-90-2.1% of (b) Schedule Variance-48-1.1% of (b) Status below is as of Jan 31-03 *contingency is held at project level Software-specific contingency: see Instrument Software presentation

34. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 34 Manpower Plan FTEs 4.1.7 Electronics

35. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 35 Procurements Long-Lead Procurements –Tower power supplies (RFP close March 25) –Processor (RFP in April) –Voltage regulators (after CDR) Major Upcoming Procurements Near-Term (< 4 months) –FPGA’s –Connectors –MOS Transistors –DC/DC Converters & Filters –ASIC’s Major Upcoming Procurements Long-Term (>4 months) –Enclosures –Harness Minor Upcoming Procurements –Miscellaneous electrical components

36. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 36 Configuration Management and Information Technology SLAC CM System –Cyberdocs (web-based document storage): Electronically stored documents, drawings, procedures, Work-Order- Authorization (WOA’s) –Risk Item Database –Document Library Electronics, DAQ, Flight Software web-site –http://www-glast.slac.stanford.eduhttp://www-glast.slac.stanford.edu –Website is used to share information and store draft documents, –Directly access CM documents stored in cyberdocs

37. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 37 Issues and Concerns Schedule is very tight –Critical path has little room for delay Dependency on delivery of procured items

38. GLAST LAT ProjectDOE/NASA Peer Critical Design Review, March 19-20, 2003 G. Haller 4.1.7 Elex Overview-Management V6 38 Summary Technically the electronics and instrument software are on track Schedule and budget plan are fully in PCMS down to level 7 since PDR, both are on track Critical path and contingency analyzed No unusual risks besides risks of any high-energy physics experiment and space flight instrument Testing, fabriation, and workflow plans in place Experienced management and technical team