Transcript Electronics

GLAST LAT Project
Gamma-ray Large
Area Space
Telescope
4.1.7
GLAST Large Area Telescope:
Electronics, Data Acquisition &
Flight Software W.B.S 4.1.7
Face-to-Face Nov 04
Mike Huffer/Gunther Haller
[email protected]
[email protected]
G. Haller
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GLAST LAT Project
4.1.7
Test-Stand Summary
Client
Calorimeter (conformal)
Calorimeter
Tracker (conformal)
Tracker
ACD
I & T* (next slide)
DAQ/FSW
Electronics Support
Total
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•
•
Shipped Assemble/Test
11
3 TEM
5
0
2
0
9
0
4
0
5
0
12
0
11
0
59
3
Total
14
5
2
9
4
5
12
11
62
Finished TKR test-stands
ACD was already finished
Remaining:
– 1 TPS + 3 TEM’s. In conformal coating, expected back end of this
week. To be shipped next week
– 1 PDU to I&T
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GLAST LAT Project
4.1.7
Test-Stand Summary (continued)
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ACD
– DAQ/I&T team travelled to GSFC to update LCB including code on
ACD test-stands
• Status: seems to work
CAL
– DAQ/I&T team travelled to NRL to update 3 CAL test-stands
• Status: works
– Additional LCB’s to update remaining ones in progress
TKR
– Need to decide when to update
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GLAST LAT Project
4.1.7
ACTEL’s
• Exchanged all 32-1 and 72-series MEC fab-line ACTELS with
UMC-fab-line
– Programmed 4 TEM sets
– Are in lead-forming, expected back this week
– To be assembled on TEM Qual, TwrA, TwrB TEM (one spare
set of FPGA’s)
• 72-1 series (used on LCB) not received yet, but not needed yet
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GLAST LAT Project
4.1.7
TEM/TPS Production Status
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TEM/TPS Assembly (at General Technology)
– Surface-mount assembled both sides of 3 TEMs and 3 TPS’s
– No FPGA’s since GT pointed out some pin-misalignment
• Sent back to SLAC, decided that they can be used
• GT agreed but we will be sending UMC line devices
• Does not delay schedule, since FPGA’s will be put on using METCAL rework station
– 3 TEM’s were dropped from about 3 feet by accident
• NCR’s created, damage being investigated
• Probably ok but needs action
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Boards were again inspected
Proceed with thru-hole components
In parallel decide how to repair damage if needed
Find out why it happened to prevent it from happening again
Wait till function/performance test to close NCR’s
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Very slow progress. GT received parts kit 9/23. As of today only SMD components loaded (no thruhole, etc)
– Test-stands arrived at General Technology
• 3 engineers will travel Monday after Thanksgiving to Board test (assuming assembly proceeds
as planned)
– Getting assembled boxes back before Christmas is a challenge
Released production of balance of PCB’s, expected in 20 days.
– Can’t wait anymore until GT has first board assembled
– Low risk since SLAC had already assembled one flight boards and tested over T
Plan still to wait for programming of balance of FPGA’s until board test results are available
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GLAST LAT Project
4.1.7
GASU & GASU-PS & PDU
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PDU
– Flight PCB fabrication: Received at SLAC
– One board will be loaded in-house
– Internal cable assembly
• SOW released
• RFP package being assembled in purchasing
– Enclosure in fabrication, expected early December
– Overall assembly
• SOW released
• Drawings released
• RFP being assembled in purchasing
– Issue with one part: Omnirel regulator which was recalled: Delivery not
before end of February
– Tester defined
GASU, GASU-Power Supply
– Flight PCB fabrication awarded: Expected to be received early December
– Rest identical status as PDU
– Tester being designed and built
– Test coverage for AEM and CRU, and EBM strong, GEM is weak
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GLAST LAT Project
4.1.7
SIU/EPU
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Crate enclosures in fabrication, expected to be received in December
RFP package for internal harness being worked on in purchasing
Boards
– Finished hole size will be 32 mil +/-3 on PCI boards including
back-plane
– Did not get feed-back by GSFC or PCB (but had sent email that we
will proceed unless there are concerns)
– Proceed with flight board fabrication
• SIB, LCB, CPS, Backplane
• PCB packages in release cycle
– Backplanes, LCB out for RFP
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– ERNI cPCI connectors still not approved, not sure about the
screening plan. Issue with Sn plating?
• Did some tests at SLAC material lab, report in progress
• Need closure from PCB & GSFC
Assembly SOW not written yet
EEPROM on RAD750 issue
– See FSW. Decided to use 4 images and check-sum. No PROM
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GLAST LAT Project
4.1.7
LAT Harness (Box-to-Box)
• RFP package of most cables being finalized in purchasing
– Drawings released
• There will be second RFP for remaining drawings
– E.g. PDU to miscellaneous internal LAT sensors
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GLAST LAT Project
4.1.7
ASIC
• All GTCC1, GCCC1 TEM ASIC’s screened
– Qualification testing at GSFC has started
– Test-setup assembled at GSFC and is working
• GLTC ASIC’s (for GASU)
– Thermal cycled GLTC’s
– Screening hardware debugged, working
– Test software in progress (Leonid has taken over for Oren
who is not at SLAC anymore)
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GLAST LAT Project
4.1.7
Testbed
• Hardware construction complete
• Minor testing of EPU’s from a system level remains…
– Waiting on availability of FSW EPU bootstrap
• Physics-to-Physics demonstration
– GLEAM to (LATTE) Single Event Display
• > 20 KEvents/sec (for hours)
• All 16 towers (+ readout of ACD)
– Normal muons
– 1 GEV gammas
• Working on incorporating ACD simulation
– Shown to work stand-alone
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GLAST LAT Project
4.1.7
17th “tower”
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Constructing…
– Full tower
• 4 AFEE production-line flight board copies
• 36 production line MCMs
• flight design cables
– Partial tower
• 4 AFEE production-line flight board copies
• Limited number of EM MCMs
• Burn-in cables
Keystone for much of our testing…
– FSW Calibration software
– GASU production
– TEM validation
– I & T software commissioning and practices validation
Calorimeter worked right out the box
Issues with tracker (being worked)
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