NIRCam News
December 18, 2006
Previous editions are available in the archive.
Tuesday Telecon
Tuesday, December 19, 1600 EDT
No Telecon this week due to monthly and party.
NIRCam Calendar
| Date | Event | Details |
| 12/19/06 | NIRCam Monthly | Video, 1130 EST Start |
| 1/29/07 | NIRCam Monthly | GSFC |
| 1/30-31/07 | JWST T-NAR | GSFC |
| 2/22/07 | NIRCam Monthly | Camarillo |
| 3/22/07 | NIRCam Monthly | Palo Alto |
| 4/26/07 | NIRCam Monthly | Palo Alto |
| 5/22/07 | NIRCam Monthly | Palo Alto |
| June 11-14, 2007 | JWST Workshop | Dublin, Ireland |
Last Week's Accomplishments
NIRCam Activities for Week Ending 12/12/06
1) First batch of flight cable assemblies are undergoing
final inspection before shipment to Teledyne. Another 3 asemblies
are close behind in the queue.
2) A LiF lens is being mounted in preparation for next week's
singlet cryo test.
3) Two out of three liens from the bandpass filter MRR have
been worked off with the third expected by the end of the week.
4) I&T has completed the trade for choice of method for measuring
WFE with a double pass interferometric technique being selected.
5) All thermal strap drawings are complete and in the process of
final review and approval.
Announcements
NIRCam Top 5
| Item | Status | Action | Next Report | |
| 1 | Detector Schedule | |||
| 2 | Optical Bench | |||
| 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 |
| SE-04 | Verification Plan | Disapproved | 11/8/2006 | See JWST-MEMO-6957 |
| SE-10 | Math Models | Returned with comments | 11/8/2006 | See JWST-MEMO-7015 regarding mechanical models only |
| IT-01 | I&T Plan | Delivered | 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 | returned w/ comments | 1/9/2007 | |
| OPS-11 | Ops Concept | needs update | See JWST-MEMO-4518 | |
| PM-01 | Proj Mgmt Plan | approved | ||
| SI-09 | K-Mounts Reqts | returned w/comments | 12/31/2006 | |
| SE-01 | Sys Engr Plan | approved |
Pending Changes
| Mod | Mod Descr | CCR # | RTC# | Description | Cost/No | Status | Due | Comments | ECD |
| tbd | Wave 6 Cost Changes | yes | Tech Eval | ||||||
| 543 | NIRCam SOW Rev F | yes | Complete | ||||||
| tbd | Wave 7 Changes | ||||||||
| 593 | ETU Spec | Complete |
|
||||||
| IRD Rev G (Final Rev for ETU) | no | CCR | |||||||
| 34J | Outgassing Rate | ||||||||
| 54A | Stray Light #2 | ||||||||
| 56D | Electrical Changes | Scott H. | |||||||
| 65A | FOV Changes | ||||||||
| 66A | Grounding | ||||||||
| 68A | ICE Sync Changes | ||||||||
| 70B | ICP A | ||||||||
| 71C | K-mount Allocations | ||||||||
| 73A | Telemetry Rate TBRs | ||||||||
| 74E | MIPS | ||||||||
| 76B | FSW Data Rate | ||||||||
| 78C | Longwave Grism | ||||||||
| 79E | FSW Changes | ||||||||
| 81C | 1-G Envelope | ||||||||
| 82B | Fuse Blow Transient | ||||||||
| 87B | Post CDR Thermal Updates 2 | ||||||||
| 88A | WFS-DHS Positioning | ||||||||
| 89D | EMC | ||||||||
| 90A | Harness Update | ||||||||
| 91A | Surface Cleanliness | ||||||||
| 92C | LVDS Signals | ||||||||
| 93A | Voltage Ripple | ||||||||
| 94B | WFS Filters | ||||||||
| Wave 8 Changes | |||||||||
| IRD Rev H | |||||||||
| 67B | Alignment Changes | Loop 1 |
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 | C |
B |
Low |
| NIRCam-Level Risks | ||||
| 28 | OBA Damage | D |
C |
Medium |
| 15 | SCA Delivery Impacts I&T Schedule | D |
B |
Medium |
| 4 | Region 1 Heat Transfer | D |
C |
Medium |
| 34 | FPE to ASIC Harness Design | D |
A |
Low |
| 45 | WFE due to Bench Distortion | C |
C |
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 | C |
C |
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 | Closed |
| JWST-NIRCam-CDR-002 | NIRCam Mechanical Disturbance Analysis & Verification | A. Nordt | 2/1/2007 | Closed |
| 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 | 2/28/2007 | |
| JWST-NIRCam-CDR-006 | Drawing status | B. Steakley | 7/15/2006 | Response Submitted |
| JWST-NIRCam-CDR-007 | Stray Light Baffle Coating | B. Biggs | 7/15/2006 | Response Submitted |
| JWST-NIRCam-CDR-008 | Focal plane assy cable soldering | T. Magoncelli | 7/15/2006 | Closed |
| 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 | Closed |
| JWST-NIRCam-CDR-011 | Optical Chain Workmanship Testing | T. Kvamme | 9/15/2006 | Closed |
| JWST-NIRCam-CDR-012 | ASIC Heatloads and Off-Baseline Case | L. Osborne | 9/15/2006 | Closed |
| JWST-NIRCam-CDR-013 | TV Test Cycles - Instrument Level | M. Pryor | 9/15/2006 | Response submitted |
| JWST-NIRCam-CDR-014 | TV Chamber Readiness | M. Pryor | 2/28/2007 | Response submitted |
| 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 | Closed |
| JWST-NIRCam-CDR-017 | ICE Harness Testing | J. Thatcher | 9/15/2006 | Closed |
| JWST-NIRCam-CDR-018 | ICE Power Card - decoupling capacitors | J. Thatcher | 9/15/2006 | Closed |
| JWST-NIRCam-CDR-019 | ICE CCA Design | J. Thatcher | 9/15/2006 | Closed |
| 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 | Response submitted |
| JWST-NIRCam-CDR-022 | Measure S&P Reflectances | L. Huff | 9/15/2006 | Late |
| JWST-NIRCam-CDR-023 | Check etalon effects on optics | L. Huff | 9/15/2006 | Response Submitted |
| JWST-NIRCam-CDR-024 | Perform reliability analysis | B. Bonner | 9/15/2006 | Closed |
| NIRCam Subsystem CDRs | ||||
| FPA-3 | Shielding of temp sensor/heater cable | T. Magoncelli | ||
| FPA-5 | Verify CMLBs not radioactive | E. Young | ||
| I&T-3 | Volume measurement on ASMIF | M. Pryor | ||
| I&T-4 | Correlate warm-to-cold models | Response submitted - Bill Eichhorn to review | ||
| I&T-5 | Add test with SMART after FPA installed at Module | M. Pryor | ||
| I&T-6 | Misalignments in forward and reverse directions | Response submitted - Bill Eichhorn to review | ||
| I&T-7 | Provide alignment details | M. Pryor | ||
| I&T-8 | Cold window transmission at 300K | |||
| I&T-10 | WFE of ambient optics, null lenses | John requests more study of ambient techniques | ||
I&T-11 |
Define alignment budget items | John requests more analysis | ||
| I&T-14 | Include figure uncertainty in alignment | John requests more analysis | ||
| I&T-15 | VIRATAC on each optical element | John requests more analysis | ||
| I&T-16 | Structural test of NIRCam bench | M. Pryor | ||
| ICE-10 | Review position sensor cable spec. | J. Thatcher | Response submitted - Shaune Allen to review | |
| OBA-3 | Peel test, shear test, stress analysis of bonded joints | A. Nordt | Response submitted - John Johnston to review | |
| OBA-4 | Assess MS with FS=1.5 | A. Nordt | Response submitted - John Johnston to review | |
| OBA-8 | SE to do independent tolerance analysis | S. Horner | ||