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NIRCam News
August 28, 2006
Previous editions are available in the archive. Acronyms

Tuesday Telecon

Tuesday, August 22, 1600 EDT

Goddard Location: 22/C399A
Dial-in Info: 877-951-3250, Passcode 108321

Agenda: CDR RFA #17 Response (ICE Harness - Lundquist)

Review open RTCs
NIRCam Calendar
Date Event Details
8/31/06 NIRCam Monthly Palo Alto, CA @ 1600 EDT
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 8/22/06

1) Received FPA metrology dewar and began initial checkout.
2) Last batch of development unit cables started production.
3) Held an Integrated Baseline Review to complete re-plan for NIRCam.
4) Wirebonded DU SCAs using the first Az-produced cable assemblies.

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 Returned - incomplete    
SA-07 As Designed Parts List Approved    
SA-08 Parts Database Approved    
SA-09 Parts Stress Analysis Approved    
SA-14 Hazard Analysis Resubmitted    
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 E yes complete      
        NIRCam ETU Spec no        
        NIRCam SOW Rev F yes Complete      
tbd       Wave 7 Changes          
        IRD Rev F no        
      34E Outgassing Rate yes Loop 1 9/7/06    
      54A Stray Light #2     8/21/2006 S. Horner  
      56A IRSU   Draft 8/29/2006 D. Speer  
      65A FOV Changes     9/7/2006 B. Bos  
      67A Alignment TBRs   Draft   Crow/Davis  
      68A ICE Sync Changes   Loop 2      
      70B ICP A   Loop 2      
      71B K-mount Allocations   Draft   J. Crow  
      73A Telemetry Rate TBRs   Loop 2      
      74B MIPS   Loop 1      
      76A FSW Data Rate   Loop 2      
      78A Longwave Grism   Loop 1      
      79C FSW Changes   Loop 2   K. Barnes  
      81B 1-G Envelope   Loop 2      
      82B Fuse Blow Transient   Loop 2      
      85A Radiation Change   Draft      
      86A Loads from Harnesses   Draft      
      87A Post CDR Thermal Updates 2   Draft      
      88A WFS-DHS Positioning   Draft      
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