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NIRCam News
September 5, 2006
Previous editions are available in the archive.

Tuesday Telecon

Tuesday, September 5

No telecon today due to folks traveling to GSFC for Alignment TIM

Next Week (9/12): Outgassing Rate

NIRCam Calendar
Date Event Details
9/6/06 Alignment TIM GSFC
9/7/06 K-Mount TIM GSFC
9/6-8/06 ISIM PDR Dry Run #2 GSFC
9/12-14/06 Eclipse SRR Redondo Bch, CA
9/26/06 NIRCam Monthly Palo Alto, CA
10/2-4/06 ISIM PDR Final Dry Run GSFC
10/23-24/06 JWST SWG GSFC
10/23/06 IRSU PDR GSFC
10/24-26/06 ISIM PDR GSFC Area
10/27/06 NIRCam Monthly GSFC
11/21/06 NIRCam Monthly Camarillo, CA
11/28-30/06 JWST Quarterly Redondo Bch, CA
12/19/06 NIRCam Monthly Palo Alto, CA
1/30-31/07 JWST T-NAR GSFC
Spring 2007 JWST Quarterly Dublin, Ireland

Last Week's Accomplishments

NIRCam Activities for Week Ending 8/29/06

1) Submitted two documents that were revised after receiving comments.
2) First SCAs using Arizona-built cable assemblies are now in cold testing and are functional.
3) Completed a contract mod with Rockwell to reflect new delivery dates.
4) JDSU has begun making sample AR lens coatings. The LW coatings and the one SW coating done so far all meet requirements.
5) Received non-flight qualified ETU temp sensors from GSFC.
6) Held a Science Team Meeting.

Announcements

 
NIRCam Top 5
  Item Status Action Next Report
1 Detector Schedule Weekly telecons resumed    
2 Optical Bench Work restarted at Axsys    
3 Lens Triplet Cryo Test      
4 Filter Wheel Life Test with PFD    

 
5

Optical Alignment

     
Document Status
DRD Title Status Due Comments
IT-03 Instrument and GSE Ground Transportation Plan Approved    
PM-01 Project Management Plan Approved    
SA-02 Contamination Control Plan Returned for changes    
SA-06 Materials Usage List Resubmitted   Comments due 9/13 via NGIN
SA-07 As Designed Parts List Approved    
SA-08 Parts Database Approved    
SA-09 Parts Stress Analysis Approved    
SA-14 Hazard Analysis Resubmitted   Comments due 9/5 via NGIN
SE-04 Verification Plan returned    
SE-08 Inputs to IOS ICD Approved    
SE-09 Fault Protection Description Returned with comments    
SE-10 Math Models Returned with comments   thermal & optical ok, mechanical rejected
Pending Changes
Mod Mod Descr CCR # RTC# Description Cost/No Status Due Comments ECD
tbd       Wave 6 Cost Changes yes rdy for RFP      
    476   IRD Rev F yes complete      
        NIRCam ETU Spec no        
        NIRCam SOW Rev F yes Complete      
tbd       Wave 7 Changes          
        IRD Rev G no   11/30/06    
      34E Outgassing Rate yes Loop 2 9/12/06    
      54A Stray Light #2   hold 8/21/2006 S. Horner  
      56A Electrical Changes   Draft 9/19/06 D. Speer  
      65A FOV Changes     9/6/2006 B. Bos  
      67A Alignment TBRs   Draft 9/6/2006 Crow/Davis  
      68A ICE Sync Changes   complete      
      70B ICP A   complete      
      71B K-mount Allocations   Draft 9/6/2006 J. Crow  
      73A Telemetry Rate TBRs   Loop 2      
      74B MIPS   Loop 1 9/5/06 K. Barnes  
      76A FSW Data Rate   Loop 2      
      78A Longwave Grism   Loop 1      
      79C FSW Changes   Loop 2   K. Barnes  
      81B 1-G Envelope   Loop 2 9/5/06 Julie  
      82B Fuse Blow Transient   Loop 2      
      85A Radiation Change   Draft      
      86A Loads from Harnesses   Draft      
      87A Post CDR Thermal Updates 2   Draft 9/7/06    
      88A WFS-DHS Positioning   Draft 9/21/06    
NIRCam Risks
Number Title Impact Likelihood Rating
NIRCam ISIM-Level Risks      
NIRCam-32 NIRCam Lens Mounts
C
A
 Low
NIRCam-138 NIRCam Wavefront Error (low/mid/high sf)
D
B
 Medium
NIRCam-143 NIRCam Optical Transmission
C
B
 Low
NIRCam-191 NIRCam Detector BCS Failures
C
A
 Low
NIRCam-250 NIRCam Region 1 Heat Transfer
B
C
 Medium
NIRCam-251 NIRCam Optical Alignment
D
C
 Medium
NIRCam-Level Risks      
28 OBA Damage
D
C
 Medium
15 SCA Delivery Impacts I&T Schedule
D
C
 Medium
4 Region 1 Heat Transfer
D
C
 Medium
34 FPE to ASIC Harness Design
D
C
 Medium
45 WFE due to Bench Distortion
C
D
 Medium
80 Optical Throughput due to Contamination
C
D
 Medium
33 I&T GSE Design and Fab not in time for I&T
C
C
 Medium
35 Optical Triplets and DBS Mount Distortion
C
C
 Medium
8 FPE Parts Qualification
C
C
 Medium
78 WFE Degradation due to I&T tolerance exceedance
C
C
 Medium
79 Optical throughput loss due to coatings
Medium
16 Sensitivity loss due to FPA/ASIC/FPE/cable noise
C
C
 Medium
Review RFAs
Number Title Assigned To Due Date Status
NIRCAM Instrument Level CDR 5/23/2006      
JWST-NIRCam-CDR-001 Combined KM/NIRCam Systems Test A. Nordt 2/1/2007  
JWST-NIRCam-CDR-002 NIRCam Mechanical Disturbance Analysis & Verification A. Nordt 2/1/2007  
JWST-NIRCam-CDR-003 CPT 1 Test at 39K M. Pryor 2/1/2007  
JWST-NIRCam-CDR-004 Optics Mounts T. Kvamme 2/1/2007  
JWST-NIRCam-CDR-005 Systems I&T M .Pryor 2/1/2207  
JWST-NIRCam-CDR-006 Drawing status B. Steakley 7/15/2006 Late
JWST-NIRCam-CDR-007 Stray Light Baffle Coating B. Biggs 7/15/2006 Late
JWST-NIRCam-CDR-008 Focal plane assy cable soldering T. Magoncelli 7/15/2006 Late
JWST-NIRCam-CDR-009 Filter wheel housing test temperatures S. McCully 9/15/2006  
JWST-NIRCam-CDR-010 EEE Parts T. King 9/15/2006 Response submitted
JWST-NIRCam-CDR-011 Optical Chain Workmanship Testing T. Kvamme 9/15/2006  
JWST-NIRCam-CDR-012 ASIC Heatloads and Off-Baseline Case L. Osborne 9/15/2006 Response submitted
JWST-NIRCam-CDR-013 TV Test Cycles - Instrument Level M. Pryor 9/15/2006  
JWST-NIRCam-CDR-014 TV Chamber Readiness M. Pryor 7/15/2006 Late
JWST-NIRCam-CDR-015 Optics Readiness Plan T. Kvamme 7/15/2006 Late
JWST-NIRCam-CDR-016 Beryllium Machining Plan A. Nordt 7/15/2006 Late
JWST-NIRCam-CDR-017 ICE Harness Testing J. Thatcher 9/15/2006 Response rejected
JWST-NIRCam-CDR-018 ICE Power Card - decoupling capacitors J. Thatcher 9/15/2006 Response submitted
JWST-NIRCam-CDR-019 ICE CCA Design J. Thatcher 9/15/2006 Response submitted
JWST-NIRCam-CDR-020 PDPR/PR Plan Change M. Pryor 9/15/2006  
JWST-NIRCam-CDR-021 PIL Straylight L. Huff 9/15/2006  
JWST-NIRCam-CDR-022 Check etalon effects on optics L. Huff 9/15/2006  
JWST-NIRCam-CDR-023 Perform reliability analysis B. Bonner 9/15/2006  
NIRCam Subsystem CDRs      
Filter-1 Filter fishbone S. Horner    
Filter-3 Ghosting at Edges analysis Y. Mao    
Filter-9 Angle of incidence vs. OOB Y. Mao    
FPA-3 Shielding of temp sensor/heater cable T. Magoncelli    
FPA-4 Document shielding analysis B. Biggs    
FPA-5 Verify CMLBs not radioactive E. Young    
FPE-8 Reliability analysis of FPE/cable/ICP/ASIC/FPA T. Magoncelli    
FPE-9 Delivery schedule for cables T. Magoncelli    
FPE-10 FPE cable length change impact T. Magoncelli    
FSW-1 Release FSW requirements document C. Cheng    
FSW-7 Resolve ASIC load format function (FPE vs. Ground); requirements for API call C. Cheng    
I&T-2 Risk of ETU non-verifications      
I&T-3 Volume measurement on ASMIF M. Pryor    
I&T-4 Correlate warm-to-cold models      
I&T-5 Add test with SMART after FPA installed at Module M. Pryor    
I&T-6 Misalignments in forward and reverse directions      
I&T-7 Provide alignment details M. Pryor    
I&T-8 Cold window transmission at 300K      
I&T-9 Vibrate OA with KMs M. Pryor   same as JWST-NIRCam-CDR-001
I&T-10 WFE of ambient optics, null lenses      

I&T-11

 Define alignment budget items      
I&T-12 Align GSE to optical references      
I&T-13 V1 up/down tests      
I&T-14 Include figure uncertainty in alignment      
I&T-15 VIRATAC on each optical element      
I&T-16 Structural test of NIRCam bench M. Pryor    
ICE-5 Position sensor operation and cable length J. Thatcher    
ICE-7 Reliability of stack design and cables J. Thatcher    
ICE-9 Finalize connector design J. Thatcher    
ICE-10 Review position sensor cable spec. J. Thatcher    
ICE-11 Verify sensor wire resistance meets requirement J. Thatcher    
ICE-12 Focus ICE description on ICE capability vs. flight software J. Thatcher    
ICE-17 Check command media vs. NASA parts stress J. Thatcher    
OBA-3 Peel test, shear test, stress analysis of bonded joints A. Nordt    
OBA-4 Assess MS with FS=1.5 A. Nordt    
OBA-8 SE to do independent tolerance analysis S. Horner    
Optic_mounts-29 Flat field source use.      
Baffles-3 Worst case clearance analysis B. Biggs    
Baffles-5 STOP analysis results, clearances B. Biggs    
Baffles-14 ASAP model to assess particles on POM