Summary of NIRCam
Preliminary Design Review
Peter McCullough
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
1
NIRCam PDR Stat’s
• Lockheed Martin Adv Tech Center, Palo Alto, CA
• 100+ audience members
STScI: Vicki Balzano, George Hartig, Jerry Kriss, PRM
• Two full days (Oct 20-21, 2004)
32 Presentations
Day 1 = 13 presentations and 332 slides
Day 2 = similar
• “A Resounding Success” – Chairperson Dillman
• Critical Design Review to be in Fall 2005
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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NIRCam PDR Success Criteria
• Closure of SRR action items
• Mission objectives and operations are understood
• Instrument level requirements and interfaces have been
established and flowed down to subsystem level
• Describe instrument preliminary design
• Describe ground support equipment preliminary design
• Present analysis or test data showing that the preliminary
design is compliant with requirements/interfaces
• Describe verification and test plans
• Mission Assurance and Specialty Engineering
• Roadmap to CDR
• Success authorization to purchase long-lead items
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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Science Example from the End of the Dark Ages
VLT
Gemini
NIRCam 10-σ
in 10,000 secs
Gemini 8-m telescope,
22,000 secs
VLT 8-m telescope,
14,000 secs
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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NIRCam: SRR PDR
NIRCam PDR
October 2004
SRR
November 2003
May 2004
August 2004
Increase Lens Diameters
Upgrade to 3-DOF FAM
Add PIL, Pupil Imaging Lens
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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What’s New since SRR?
From OTE
3
9
10
11
12
4
5
6
2
1
13
15
7
8
14
1
Pick-Off Mirror Assembly
2
Coronagraph
3
First Fold Mirror
4
Collimator Lens Group
5
Dichroic Beamsplitter
6
Long Wave Filter Wheel Assembly
7
Long Wave Camera Lens Group
8
Long Wave Focal Plane Housing
9
Short Wave Filter Wheel Assembly
10
Short Wave Camera Lens Group
11
Short Wave Fold Mirror
12
Pupil Imaging Lens
13
Short Wave Focal Plane Housing
14
ICE Interface Panel
15 NIRCam
FPE Interface
SystemPanel
Requirements Review,
6 Nov 2003
NIRCam Preliminary Design Review,
20-21 Oct 2004
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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Optomechanical Designs
FWs
FAM
PIL (concept only – PDR in May 2005)
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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PIL = Pupil Imaging Lens
• Sense alignment of OTE exit pupil & NIRCam entrance
pupil; adjust alignment using new 3-DOF pickoff mirror.
• Characterize OTE exit pupil (assists WFS).
• Utilized during ground testing far more than in flight.
• Concept is a doublet lens mounted on a balanced, springloaded rotating arm.
• Fail-safe design:
If power fails, spring pulls PIL out of beam.
If spring fails, actuator pulls PIL out of beam.
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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NIRCam PDR Excerpts (1 of 2)
• NIRCam region 1 (bench) thermal rqmt on power:
NIRCam total (dissipated + parasitic) < 0.165 W
Instead of microprocessors, using FPGAs (procurement is
problematic now, so a risk)
• NIRCam FPE power rqmt < 25 W; non-compliant
• Flight Sensors
Began fabrication in Nov 2004
Expect 8 superlots, total of 96 SCAs, need 10 flight SCAs
ASIC tested at U Hawaii – decision in Jan 2005
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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NIRCam PDR Excerpts (2 of 2)
• Transmission Requirement is > 66%. Doesn't meet this
below 1.4 um (showing 59%), but still meets sensitivity
requirement. Biggest loss is ~15% in collimator group, where
it is hard to get 0.6-5.0 um broad-band anti-reflection
coatings.
• Stray light: Scattering is ~0.2% per surface; loss is 4%
overall. 3% is forward scatter, which ends up as a diffuse
illumination of the focal plane. Rqmt =<2%.
• Three different lens mounts tested since SRR. Selected one
with 12 radially-spring-loaded pads.
• GFE beyond scope of NIRCam PDR, but FYI:
GSFC will supply NIRCam OTE simulator (NOTES)
GSFC has been measuring cryogenic indices of refraction
for materials of NIRCam lenses (LiF, BaF2, and ZnSe).
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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Review Team Criticisms
• Parallel ops? Need more thought. Very important.
• Commissioning/cool-down schedule?
• Optics and coatings from ambient to cryo?
• Ghosting analysis excluded filters. WFC3?
• Coronagraphic rqmts--- “best effort” not clearly written.
•
•
•
•
Software design is under-developed.
Plan for spares needs a 2nd look.
Power non-compliance in FPE. (ASIC may help)
Launch date is too far away! TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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Summary = Unanimous Vote
Dennis Dillman, Chair
Steve Scott, Systems Engineering
Minh Phan, Mechanical Systems
Joe Schepis, Electromechanical Systems
Tom McCarthy, Thermal Engineering
Eugene Waluschka, Optics
Sachi Babu, Detector Systems
Steve Graham, Electrical Systems
Dave Leckrone, Space Science
Bill Taylor, IRT
Ken Sizemore, IRT
Mike Werner, IRT
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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Backup Slides
• Agenda (2)
• Bench layout with labels (1)
• Pupil and Filter wheels populated with
proposed pupils and filters (2)
• More kudos (1)
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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NIRCam PDR Agenda ( 1 of 2 )
Topics Day 1 : October 20
1 • Welcome and Introduction
2 • NIRCam Mission Overview
3 • NIRCam Operations
4
5
6
7
8
9
10
11
12
13
th
Break
• NIRCam Change in System Requirements
• NIRCam Instrument Design Overview
Subsystems
•Optical (optics, baffles, and mounts)
Lunch
- Optical Mounting
• Optical Bench Assembly
• Mechanisms
- Filter Wheel Assembly
- Focus and Alignment Mechanism
Break
- PIL Requirements and Interfaces
•Thermal
• Electronics
- Instrument Control Electronics
Adjourn Day 1
Start Time
8:00 AM
8:30 AM
9:10 AM
9:30 AM
9:40 AM
10:10 AM
Presenter
Richard Vassar, Dennis Dillman
Marcia Rieke / Scott Horner
Peter McCullough
Bruce Steakley
Larry Burriesci
10:40 AM Lynn Huff
11:40 AM
12:30 PM Todd Kvamme
1:00 PM Alison Nordt
1:40 PM
2:20 PM
3:00 PM
3:10 PM
3:30 PM
Sean McCully
Bill Cahill
Charles Clark
Liz Osborne
4:20 PM Earl Aamodt
5:00 PM
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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NIRCam PDR Agenda ( 2 of 2 )
14
15
16
Topics Day 2 : October 21
- Focal Plane Electronics
• Focal Plane Assembly (FPA)
- FPA Housing and Baffles
st
Start Time
8:00 AM Tony Magoncelli
8:50 AM James Garnett
9:40 AM Brent Biggs
Break
17
18
• Software
• Government Furnished Property
Lunch
19
20
21
22
23
24
• Integration and Test Plans
• GSE
- Mechanical GSE
- Optical GSE
- Electrical GSE
- Software GSE
• Verification Plans
26
27
28
29
30
31
32
10:10 AM
10:20 AM
Chin-An Cheng
11:00 AM
Larry Burriesci
11:10 AM
12:10 PM
Dave Mason
1:10 PM Dave Mason
1:20 PM Paul Schweiger
1:40 PM Earl Aamodt
1:50 PM Chin-An Cheng
2:00 PM Doug Kelly
Break
25
Presenter
2:20 PM
• Electro-Magnetic Effects
• Contamination Control
• Reliability and FMEA plans
• Material & Process
• EEE Parts
• Mission Assurance ( Quality and Safety)
• Education and Public Outreach
• System Drivers, Risk Mitigation, and
Program Plans
2:30 PM Josh Hellhake
• Review Team Caucus
• Feedback
4:20 PM
2:45 PM Ken Aline
3:00 PM Joe Horwath
3:10 PM Dennis Petrakis
3:20 PM Dave Seidl
3:30 PM Dave Seidl
3:40 PM Don McCarthy
3:50 PM Richard Vassar
4:40 PM Review Team
Adjourn PDR
5:00 PM
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
15
What’s New since SRR?
From OTE
3
9
10
11
12
4
5
6
2
1
13
15
7
8
14
1
Pick-Off Mirror Assembly
2
Coronagraph
3
First Fold Mirror
4
Collimator Lens Group
5
Dichroic Beamsplitter
6
Long Wave Filter Wheel Assembly
7
Long Wave Camera Lens Group
8
Long Wave Focal Plane Housing
9
Short Wave Filter Wheel Assembly
10
Short Wave Camera Lens Group
11
Short Wave Fold Mirror
12
Pupil Imaging Lens
13
Short Wave Focal Plane Housing
14
ICE Interface Panel
15
FPE Interface Panel
NIRCam Preliminary Design Review,
20-21 Oct 2004
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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SW Pupil & Filter Wheel Populations
DHS 2
WFS
Filter
F150W2
SW
F1
SWF12
SW
P1
SWP12
11
P
SW
11
F
SW
SWF3
F182
M
F110W
SW
F4
SWF6
F162M
Weak
lens 3
F5
SW
SW
P4
SWP9
F212N
DHS 1
Flat
field
pinhole
F090W
F2
W
S
F8
SW
P2
W
S
F225M
(A)
F164M
(B)
F070W
S
W
F7
P5
SW
SWP6
P8
SW
Weak
lens 1
F210M
SWP3
SW
P7
Weak
lens 2
F108N
SWF9
Outward
pinholes
S
W
P1
0
Coronagraph
pupil 1
F187N
Imaging
pupil
SW
F
10
Coronagraph
pupil 2
F150W
F200W
F140M
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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LW Pupil & Filter Wheel Populations
F325N
F460M
P8
LW
LW
P4
F2
LW
F8
LW
F5
LW
F390M
F470N
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
F444W
LW
F4
LWF6
F430M
F356W
LWF3
LW
F7
P5
LW
F418N
F460N
LW
F1
F480M
LWF12
LWP9
L
W
P1
0
LWP3
1
F1
W
L
LW
P1
LWP12
Flat field
pinholes
F270W
LWF9
1
P1
W
L
F405N
P2
LW
LWP6
LW
P7
Outward
pinholes
Imaging
pupil
L
W
F1
0
Coronagraph
pupil
Coronagraph
pupil
F300M
F335M
F360M
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Kudos to NIRCam Team
Steve Scott: Very well done review. All the right elements were there.
Minh Phan: Feel very comfortable with mechanical design team. Good job.
Ready to proceed to CDR.
Joe Schepis: Congratulations. One of the better reviews he's been at.
Tom McCarthy: Congratulations to the team.
Eugene Waluschka: Excellent review.
Sachi Babu: Great progress from SRR. Ready to go to CDR. Congratulations!
Steve Graham: Very pleased to see detector development and front end
proceeding so well. Great job. In a nice position for a PDR level design.
Dave Leckrone: See no reason not to move forward. Very well done review.
Looking forward to CDR.
Bill Taylor: Ready to proceed. No major concerns. Presenters professional and
knowledgeable.
Rick Rudy: Really very impressed with the level of technical detail.
Dennis Dillman, Chair: The NIRCam PDR has been a resounding success.
Congratulations to the team.
TIPS Dec 16, 2004 of NIRCam PDR held Oct 2004
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