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NIRCam News
September 18, 2006
Previous editions are available in the archive Acronyms

Tuesday Telecon

Tuesday, September 19, 1600 EDT

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

Agenda: Status of Documents, RFAs, and Needs
RFA 17 (Position Sensor Cables)
NIRCam Calendar
Date Event Details
9/25-26/06 Detector MRR Tucson, AZ
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 09/12/06

1) Held Alignment and Strut TIMs with the ISIM team.
2) A UPS has been delivered to AXSYS for use in machining NIRCam parts.
3) Coated parts for the filter wheel passive friction device
have been received.
4) Moog has received new harmonic drives which will be coated with moly disulfide for a life test in late Nov.


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
SA-02 Contamination Control Plan Returned for changes 9/8/2006 See JWST-MEMO-6835
SA-06 Materials Usage List Add'l Info Requested 10/18/2006  
SA-10 Worst Case Circuit Analysis ? 5/22/2006  
SA-14 Hazard Analysis Approved    
SE-04 Verification Plan Disapproved 11/8/2006 See JWST-MEMO-6957
SE-08 Inputs to IOS ICD Approved    
SE-09 Fault Protection Description Returned with comments 9/23/2006 See JWST-MEMO-6936
SE-10 Math Models Returned with comments 11/8/2006 See JWST-MEMO-7015
IT-01 I&T Plan draft ETU I&T
-3 months 		 
FSW-01 FSW Product Plan needs update   See JWST-MEMO-4063
FSW-02 FSW Vision Doc needs update   See-JWST-MEMO-4210
FSW-03 FSW Reqts Spec needs update   See JWST-MEMO-4167
OPS-11 Ops Concept needs update   See JWST-MEMO-4518
Pending Changes
Mod Mod Descr CCR # RTC# Description Cost/No Status Due Comments ECD
tbd       Wave 6 Cost Changes yes rdy for RFP   need in-house est  
    543   NIRCam SOW Rev F yes Complete      
tbd       Wave 6 No-Cost          
    476   IRD Rev E no complete      
    584   IRD Rev F no complete      
    569   NIRCam Spec Rev E no complete      
    593   ETU Spec no   9/22/06    
        Attach N Applic. Doc. Matrix no        
    472   ISIM Reqts Doc Rev C no complete      
    562   ISIM Reqts Doc Rev D no complete      
    573   NIRCam ICD Rev B no complete      
    531   1553 Spec Rev A no CCB      
    428   OTE Rx Rev B no 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 Response Submitted
JWST-NIRCam-CDR-009 Filter wheel housing test temperatures S. McCully 9/15/2006 Late
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 Late
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 Late
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 submitted
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 Late
JWST-NIRCam-CDR-021 PIL Straylight L. Huff 9/15/2006 Late
JWST-NIRCam-CDR-022 Check etalon effects on optics L. Huff 9/15/2006 Late
JWST-NIRCam-CDR-023 Perform reliability analysis B. Bonner 9/15/2006 Late
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      
NIRCam Needs Date Assigned Assigned to ECD Status
Need PSD information and details of mirror segments for higher fidelity coronagraphic modeling 8/31/2006 Pam Davila    
Harness and thermal strap loads on bench & struts 8/31/2006 John Crow    
Resolve ASIC jumpstart issue 8/31/2006 Mitra Dutta    
Temp Sensors for Contam Prevention Heaters (ETU) 8/31/2006 Stu Glazer   Were due 6/8/06, needed by 11/3/06
ISIM CCDH FSW Rev 6.0 installed on SIDU including Spacewire interface and function call for ASIC micro-codes 8/31/2006 Mark Voyton   Needed by 12/2006
Release Rev B of ICD with Thermal Info 8/31/2006 Julie   complete
Resolution of Rogue Path 8/31/2006 Pam Davila   incorporate changes to IRD
Resolve open TBXs in IRD & ISIM Reqs Doc 8/31/2006 Julie    
Resolve open RTCs in IRD, ISIM Reqts, ICD 8/31/2006 Julie    
Acronym List
ASIC Application-Specific Integrated Circuit
ASMIF Ambient Science Instrument Mechanical Interface Fixture
BCS Balance Composite Structure
CCDH Common Command & Data Handling
CMLB Ceramic Multi-Layer Board
CPT Comprehensive Performance Test
DBS Dichroic Beam Splitter
DHS Dispersed Hartmann Sensor
EEE Electrical, Electronic, and Electromechanical (Parts)
ETU Engineering Test Unit
FOV Field of View
FPA Focal Plane Assembly
FPE Focal Plane Electronics
FSW Flight Software
GSFC Goddard Space Flight Center
GSE Ground Support Equipment
I&T Integration & Test
ICD Interface Control Document
ICE Instrument Control Electronics
ICP Interconnect Panel
IRD Interface Requirements Document
IOS ISIM-to-OTE-and-Spacecraft
ISIM Integrated Science Instrument Module
KM Kinematic Mount
MIPS Million Instructions Per Second
MRR Manufacturing Readiness Review
NGIN Next Generation Integrated Network
OA Optics Assembly
OBA Optical Bench Assy
OOB Out of Band
OTE Optical Telescope Element
PDR Preliminary Design Review
PFD Passive Friction Device
PIL Pupil Imaging Lens
PSD Power Spectral Density
RFA Request for Action
RTC Request for Technical Coordination
Rx Prescription
SCA Sensor Chip Assembly
SOW Statement of Work
STOP Structural, Thermal, Optical (Analysis)
SWG Science Working Group
TBR To Be Reviewed
TIMs Technical Interchange Meeting
T-NAR Technology Non-Advocate Review
TV Thermal Vacuum
UPS Uninterruptible Power Supply
WFE Wavefront Error
WFS Wavefront Sensing