Post on 21-Dec-2015
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 1
GLAST Large Area Telescope:GLAST Large Area Telescope:
Electronics, DAQ & Flight Software
Gunther HallerStanford Linear Accelerator CenterElectronics System Engineer
haller@slac.stanford.edu
Gamma-ray Large Gamma-ray Large Area Space Area Space TelescopeTelescope
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 2
ContentContent
• Electronics System– Overview– Location– Architecture– Deliverables– WBS Organization
• Recent Progress• Milestones & Budget• Response to Recommendations from last Review
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 3
LAT Electronics OverviewLAT Electronics Overview
• TKR, CAL & ACD Sub-System Electronics
– Amplification/shaping/digitization of detector signals
• Trigger path for fast response (2 usec trigger latency)
• Event path for trigger-selected high-resolution data readout
• Trigger & Dataflow Electronics
– Commanding and messaging of LAT electronics
– Configuration & Control of TKR, CAL, & ACD front-end electronics
– Triggering
– Event data acquisition, buffering, reconstruction and filtering
– Spacecraft interface electronics
– Instrument health monitoring
– Support for sub-system electronics development
• Power System
– Distribution, switching, conditioning, regulation of spacecraft supplied power to all LAT electronics
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 4
Location of LAT Electronics Location of LAT Electronics
TKR Elex on each of the 16
towers CAL Elex on each of the 16 towers
ACD Elex on all 4 sides
• Distributed in boxes under the 16 towers (LAT shown upside-down):
– Trigger & Dataflow (DAQ) Electronics
– Power System
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 5
Electronics ArchitectureElectronics Architecture
Front-End
CAL
TKR
TKR-CAL TEM
Event Processor
Units
Intercon-nection Module
Space-craft Interface
Unit
Tower
ACD ACD EM
to/from SC
Control & Processed Event Data
Event Data
Control & Processed Event Data
5 each (4+1)
2 each (1+1)
16 each (16+0)
2 each (1+1)
Front-End
* (1+1) = (1 Primary + 1 Secondary)
Monitoring Module
Distribution & GLT Assembly
Control, HSK Data
Control, Trigger, Event &
HSK Data
Global Trigger Module
2 each (1+1) Power Supply System
2 each (1+1)
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 6
Trigger & Dataflow, Power ModulesTrigger & Dataflow, Power Modules
• 16 TKR-CAL Tower Electronics Modules (16 Primary + 0 Secondary)• 2 ACD Electronics Modules (1 P + 1 S)• 2 Interconnection Modules (1 P & 1 S)• 2 Global Trigger Modules (1 P & 1 S)• 5 Event-Processor Units (4 P & 1 S)
– 603e/750 Power-PC processor PCI card– Event-Processor - LAT communication PCI card– PCI Backplane
• 2 Spacecraft Interface Units (1 P & 1 S)– 603e/750 Power-PC processor PCI card– SIU - LAT communication PCI card– SIU - Spacecraft communication PCI card– PCI Backplane
• 2 LAT Monitoring Units (1 P & 1 S)• Power supplies for all modules above• Power Distribution Module (1 P & 1 S)
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 7
WBS OrganizationWBS Organization
Reliab ility & QAD. Nelso nSU-SL AC
W BS 4.1.7.2
T &DF E lexG . HallerSU-SL AC
W BS 4.1.7.4/4.1.7.5
En clo su res/Harn essM .F reytagSU-SL AC
W BS 4.1.7.7/4.1.7.8
Po w er SystemD. Nelso nSU-SL AC
W BS 4.1.7.6
F lig h t So ftw areJ. Ru ssellSU-SL AC
W BS 4.1.7.9
G SE & Op eratio nS . W illiam s
SU-HE PLW BS 4.1.7.A
In stru m en t I&TG . HallerSU-SL AC
W BS 4.1.7.C
T racker E lexR. Jo h n so n
UCS CW BS 4.1.4.3.3.3
CAL E lexW .N .Jo h n so n
NRLW BS 4.1.5.7
ACD E lexJ. Orm es
G SF CW BS x.x.x
F ro n t-En d E lexG . HallerSU-SL AC
Electro n ics M an ag em en tG . HallerSU-SL AC
W BS 4.1.7.1
E lectro n ics, DAQ & F lig h t S o ftw areG . HallerSU-SL ACW BS 4.1.7
NRL
SU-HEPL
SU-SLAC
NRL
SU-HEPL
SU-SLAC
NRL
SU-SLAC
CEA-DAPNIA INFN SU-SLAC
NRL
NRL SU-HEPL SU-SLAC
NRL SU-HEPL SU-SLAC
NRL SU-HEPL SU-SLAC
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 8
Recent Technical ProgressRecent Technical Progress
• Requirement Documents for
– Trigger & Dataflow System Level III
– Trigger Level IV
– Dataflow Level IV
– Power System Level III
– Power Supplies Level IV
• Design Documents for
– Overall Electronics System
– Global Trigger System
– Tower Electronics Module
– Spacecraft Interface Unit
– Grounding & Shielding (EMI)
– Mission Assurance
– Flight-Software
• All documents on web page see
– http://www.slac.stanford.edu/exp/glast/daq
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 9
Recent Budget & Schedule ProgressRecent Budget & Schedule Progress
• Tasks entered to lowest level (7) in PMCS
• Resource loaded schedule
• Components organized as
– Pre-Engineering Module
– Engineering Module 1
– Engineering Module 2 (function and interface like flight-electronics but with commercial components)
– Qualification Module
– Flight Module
• Each of the modules scheduled as
– Requirements
– Conceptual Design
– Preliminary Design
– Layout, Fabrication, Assembly
– Standalone Test
– System Test
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 10
MilestonesMilestones
• Trigger & Dataflow Requirements Review 03/27/01• T & DF PDR 07/16/01• Flight Software PDR 07/16/01• LAT Instrument PDR 09/25/01• Engineering Model 1 (EM1) System Test Complete 03/15/02• T&DF CDR 06/19/02• Flight Software CDR 06/12/02• LAT Instrument CDR 08/05/02• Engineering Model 2 (EM2; flight software & DAQ) System Test Complete 05/10/03• Deliver Electronics Units for Calibration Unit 05/10/03• Assemble/Test Qual Unit 07/15/03• Assemble/Test last Flight Unit 12/01/03
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 11
Budget ProfileBudget Profile
GLAST LAT Project Quarterly Review, Aug. 14, 2001
Gunther Haller 12
Recommendations from Last ReviewRecommendations from Last Review
• Additional Manpower for Flight Software– Added 2 SLAC people to work on FSW
• Rick Claus (moving to GLAST project)• Curt Brune (new hire)