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GLAST LAT ProjectMonthly Status Review – Nov 3, 2005 GLAST Large Area Telescope: Performance & Safety Assurance Joseph Cullinan SLAC Performance & Safety.

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Presentation on theme: "GLAST LAT ProjectMonthly Status Review – Nov 3, 2005 GLAST Large Area Telescope: Performance & Safety Assurance Joseph Cullinan SLAC Performance & Safety."— Presentation transcript:

1 GLAST LAT ProjectMonthly Status Review – Nov 3, 2005 GLAST Large Area Telescope: Performance & Safety Assurance Joseph Cullinan SLAC Performance & Safety Assurance Manager cullinan@slac.stanford.edu (650) 926-5034 Gamma-ray Large Area Space Telescope

2 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Status October 2005 DAQ/Electronics PDU: -Completed handoff of 1 st PDU (GLAT1898) to I&T -2 nd PDU scheduled for delivery from Aeroflex in December GASU: -1 st GASU completed vibration testing -CCAs for 2 nd GASU still in assembly at Aeroflex SIU: -Completed environmental testing on proto-flight and first two flight boxes New vibration testing facility used for GASU and 2 SIUs -Primary vendor (Wyle Labs) had equipment problems -Quanta Labs (Santa Clara) was used to maintain test schedule -QA survey was conducted prior to hardware testing; no QA issues -Quanta Labs engineering support and test equipment capabilities is superior to that of Wyle

3 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Status October 2005 DAQ/Electronics QA issues with hardware built at Aeroflex: -Returned backplane (GLAT 2418) after observing flux residue on cPCI connector pins and discoloration/contamination in areas of conformal coat -Aeroflex received board yesterday and will evaluate for cleaning/rework -Expect rework to complete by next week -cPCI X-ray evaluation -NCRs have been generated when solder touch up is required -GSFC also reviewing X-rays of soldered connectors for solder void/fill evaluation -Will schedule MRB to discuss any differences between GSFC and SLAC evaluations -Continue to receive timely in-process and pre-ship inspection reports for each board from SLAC source QA at Aeroflex, so workmanship issues and rework are clearly tracked -LAT QA also supporting twice weekly status telecons with Aeroflex -Workmanship issues with Aeroflex boards have not been completely eliminated, but have been greatly reduced and have not resulted in scrapping of CCAs

4 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Status October 2005 DAQ/Electronics RAD750 boards -Spectrum/Astro reported particulate contamination (electrically conductive epoxy) on their two RAD750 boards (S/N 16 and 24) following rework at BAE -SLAC RAD750 boards were also reworked; five flight boards (S/N 12, 14, 15, 17, 18) in-house at SLAC were inspected and did not show contamination levels observed on S/A boards; no additional cleaning was required -SLAC received sixth flight board (S/N 13) yesterday; will inspect for contamination -S/A to investigate cause of contamination on their boards and possibilities for cleaning

5 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 RAD750 board contamination SLAC and Spectrum Astro observations S/N 018 (SLAC Board) Fine particulates observed lightly dispersed in localized regions (magnification 20X) S/N 024 (S/A Board) High density of particulate contamination. (magnification 30-40X)

6 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 RAD750 board contamination SLAC and Spectrum Astro observations S/N 018 (SLAC Board) Area around processor leads is visibly clean. Typical of majority of S/N 018 surface (magnification 25-30X) S/N 024 (S/A Board) Area around processor shows heavy particulate contamination (magnification 30-40x)

7 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Status October 2005 Integration and Test -Supported completion of 16 Tower integration and 16 Tower testing -Supporting inspection of parts and hardware still being received -Continue to lead weekly MRBs to work through I&T NCRs for closure

8 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Status October 2005 Tracker -Supported successful preship review of final Towers delivered -Supported Tracker team in addressing some specific INFN NCRs as requested by GSFC Product Assurance: -Identify Tower locations of TMCMs that incorporated silicone masking tape during assembly -Identify Tower locations of trays that incorporated epoxy encapsulant on MCM to SSD wire bonds -Cause of observed wire bond breakage on Tower A heavy trays -Cause of noisy channels observed in some trays -Cause of wire bonds shorting to SSDs in Tower 1 trays -Response to these questions has been completed by Tracker team; plan on reviewing these issues with GSFC this week or next -Finalized qualification test plan for Parlex and Pioneer flex cables -Plan has been approved by SLAC, GSFC and cable vendors -Will use qty = 10 bare flex cables from each vendor for qualification -Trace Labs (Hunt Valley, MD) will conduct the same qualification testing on Parlex and Pioneer cables -Goal is to successfully complete qualification testing before LAT ships to NRL

9 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Status October 2005 Mechanical Systems X-LAT Plate -Delivered to SLAC in July; reviewed acceptance data package from Lockheed Martin. Still have not received final data package -Need to repeat proof load test on lift fixture -Cracked welds observed after first proof load test -Fixture was reworked; needs to be retested/inspected Radiators -Received 9/30/05 -Identified open items in acceptance data package -LM has not yet completed data package Static Load test (Grid #2) -Supported Test readiness review with vendor (NTS) -Delta TRR scheduled for tomorrow to close remaining issues -LAT QA plans to witness and support static load test

10 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Status October 2005 FSW QA -Completed first successful formal dry run of test scrip and procedure -Completed audit of Build B0-5-1 (one finding, two observations) -Supported V&V of LATTE Release R4.10.2 -Continued support of FSW Test Script development, dry runs and LICOS development -Participated in Quality Requirements Management Process assessment with GSFC SW QE (R. Worden). -No findings were noted by GSFC during the assessment

11 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 SubsystemOpen NCRs Closed NCRs last 30 days NCRs Open 30 days or more NCRs open 90 days or more NCRs ready to close (disposition complete; need final QA review to close) DAQ6914572230 Tracker3327322517 Mechanical21111 CAL00000 ACD*10*0700 I&T36622167 * includes 5 open ACD PRs and PFRs from GSFC LAT NCR Metrics 11/3/05

12 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 Issues and Concerns Flex Cable Qual Testing -Need to complete qual testing of Parlex and Pioneer flex cables. Goal is to complete before LAT ships to NRL Final data packages and lift fixture from Lockheed Martin -Open items in data package are identified; need LM support to close -X-LAT Lift fixture needs to successfully pass second proof load test and inspection Continued focus on addressing and closing NCRs

13 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 4.1.A P&SA – Planned Accomplishments November 2005 Support testing of electronics CCAs and boxes Support formal dry runs of FSW test scripts/procedures Continue to work closely with Aeroflex to minimize workmanship issues Support and monitor results of flex cable qual testing Support Grid static load testing Work with Lockheed Martin to complete documentation packages and have remaining hardware delivered

14 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 Cost Report

15 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 Cost Variance Explanation Why overrun/underrun? -Overrun due to higher FTE required for support than budgeted. Continue to show lower overall FTE. What will be done to correct? -FTE will continue to decrease. One SLAC QE (Richard Gobin) left program in October. Can reduce FTE as final subsystem hardware production is completed

16 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 FTE Report (DOE/NASA-funded only)

17 GLAST LAT ProjectMonthly Status Review – Nov. 3, 2005 FTE Variance Explanation Why overrun/underrun? -Needed to continue higher than budgeted level of QE support at SLAC. What is the impact? -FTE continues to decrease. Will saee decrease of approx 1 FTE in October (SLAC QE left project) What will be done to correct? -Further reduction of FTE at SLAC expected in December as hardware production ends

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