TIPS/JIM
January 15, 2009
Agenda:
INS Division News (Jerry Kriss)
Five Busy Months for FGS (Ed Nelan)
The Critical Design Review for JWST’s NICSpec Instrument (Tracy
Beck)
Next TIPS/JIM: February 19, 2009
1
Instruments Division News
1/15/2009
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Welcome to our newest staff members: James Muzerolle, who joined the WIT team
in December, and Sami-Matias Niemi who joined the RIA Branch last week.
Congratulations to Andy Fruchter on his 15 years of service to STScI. Andy has been
an indispensable staff member, from his role in the first Hubble Deep Field
campaigns, to the invention of “drizzling” with Richard Hook, his scientific work on
GRBs and their host galaxies with Hubble, and now to his revamping of the
framework for MultiDrizzle. Thank you Andy, and we look forward to another 15
years of hard work!
HST news:
o Another attempt to restart the NICMOS Cryocooler System (NCS) has
started this morning.
o SM4 is still on track for May, 2009. Environmental testing of the backup
SI C&DH module is proceeding on schedule at GSFC.
o The supplemental call for proposals generated a lot of interest, with an
oversubscription of 12:1 in orbits. Notifications were sent out yesterday.
Phase II proposals will be due Jan. 27, and the first observations could be
scheduled after Feb. 5.
JWST news:
o 2009 is the “year of building” for JWST. All instrument CDRs are done,
teams are preparing and testing engineering models.
o The NIRSpec instrument team passed their Critical Design Review in
December. Tracy Beck will give us more details later at this TIPS.
o The NIRSpec Micro Shutter Array (MSA) system is having its CDR this
week at GSFC.
o ISIM is preparing for its Critical Design Review in March 2009, with a
dry run scheduled for Jan. 25.
o Next Thursday, Jan. 22, from 8:30-4:30, there will be a dry run of the
Design Review for the JWST Planning and Proposal System. This is an
opportunity to contribute HST expertise to the development of this JWST
system, and I encourage HST team members with relevant expertise and
interest to attend. You may charge the JWST ISIM WBS for this--P0004.03.03.01.
o On Friday, Feb. 6, developers from Teledyne will be here at STScI to
make presentations as part of training on IR detectors and ASICs for
JWST. While specifically JWST oriented, the general sessions on IR
detectors and ASICs are also relevant to HST. (These same ASICs will be
used for ACS-R.) Please charge your usual instrument WBS for
attendance at any of these sessions. Since much of the information is
ITAR restricted, you must register beforehand. Please reply to Dixie
Shipley.
o Goddard is advertising a civil service position to serve as ISIM I&T and
Commissioning Scientist for JWST. See the AAS job register.
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The STIC will meet here on Feb. 5 & 6.
Plans for office moves after the 4th floor construction is finished are being prepared.
I’ve distributed office assignments for INS; moves will start in early February,
beginning with offices on the rear hallway of the 4th floor, followed by the new
offices on the front side of the 4th floor. All the moves will take several weeks. The
basic logic behind these initial moves is:
o Move the archive group from Bloomberg back to Muller.
o To make room for the archive group, we’ve encouraged several research
staff to move to Bloomberg by assembling a research group in exoplanet
studies on the 6th floor.
o Move the OPO staff on the basement level to higher ground.
o Minimize the number of moves. (Even so, there are 107 and counting.)
The next INS lunch is Thursday, Jan. 29, in the Auditorium from 12:00-1:30.
TIPS/JIM
January 15, 2009
Agenda:
INS Division News (Jerry Kriss)
Five Busy Months for FGS (Ed Nelan)
The Critical Design Review for JWST’s NICSpec Instrument (Tracy
Beck)
Next TIPS/JIM: February 19, 2009
1
Five Busy Months for FGS
STScI/TIPS
01/15/09
Ed Nelan
FGS Timeline, Sept 08 - Jan 09
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Sept 15: NSSC-I FSW upgrade to support SM4 (WFC3 & COS)
– During reboot process, FGS1r is only SI available for scheduling (~2 days)
FGS Timeline, Sept 08 - Jan 09
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Sept 15: NSSC-I FSW upgrade to support SM4 (WFC3 & COS)
– During reboot process, FGS1r is only SI available for scheduling (~2 days)
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Sept 15: JSC closed for the week due to Hurricane Ike.
– Rumors warn that SM4 may slip due to Ike
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Sept 24: NASA announces SM4 launch is Oct 14
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Sept 24: STScI SMO request PIs of WFPC2 and FGS snaps to swapin ~50 targets that are observable in the October time frame in the
event that SM4 is delayed further. (LRP is depleted of WFC2 GO visits)
FGS Timeline, Sept 08 - Jan 09
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Sept 15: NSSC-I FSW upgrade to support SM4 (WFC3 & COS)
– During reboot process, FGS1r is only SI available for scheduling (~2 days)
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Sept 15: JSC closed for the week due to Hurricane Ike.
– Rumors warn that SM4 may slip due to Ike
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Sept 24: NASA announces SM4 launch is Oct 14
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Sept 24: STScI SMO request PIs of WFPC2 and FGS snaps to swapin ~50 targets that are observable in the October time frame in the
event that SM4 is delayed further. (LRP is depleted of WFC2 GO visits)
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Sept 28: Revised FGS Snap proposal 11212 submitted
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Sept 28: HST safes, CU/SDF side-A fails, FGS1r continues to observe
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Sept 30: NASA postpones SM4.
FGS Timeline, Sept 08 - Jan 09
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Oct 9: (Friday) SMO requests an additional 50 FGS targets to populate
the October 19 SMS (11212 nearly deleted)
– Tony Roman: “if you get it to us by early Tuesday, we’ll make it happen”
– all visits used up in ~10 days (Oct 20-30)
FGS Timeline, Sept 08 - Jan 09
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Oct 9: (Friday) SMO requests an additional 50 FGS targets to populate
the October 19 SMS (11212 nearly deleted)
– Tony Roman: “if you get it to us by early Tuesday, we’ll make it happen”
– all visits used up in ~10 days (Oct 20-30)
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Oct 15: NSSC-I switch to side-B
Oct 16: side-B fails
FGS Timeline, Sept 08 - Jan 09
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Oct 9: (Friday) SMO requests an additional 50 FGS targets to populate
the October 19 SMS (11212 nearly deleted)
– Tony Roman: “if you get it to us by early Tuesday, we’ll make it happen”
– all visits used up in ~10 days (Oct 20-30)
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Oct 15: NSSC-I switch to side-B
Oct 16: side-B fails
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Oct 17: SMO requests FGS proposals from UTx and GSU to fill nearterm LRP. Suggested size is “50 - 60 orbits”.
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Oct 24: Phase1 & 2 proposals submitted.
– UTx proposal has 50 orbits
– GSU proposal has 300 orbits (11943 & 11944)
FGS Timeline, Sept 08 - Jan 09
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Oct 23: Gilliland et al. request 175 FGS orbits to collect one trillion
photons from HD 17156. Observations to execute:
– Transit events: Nov 6 & 7, Dec 19
– Asteroseismology: Dec 21- Jan 2 (ten-day campaign)
FGS Timeline, Sept 08 - Jan 09
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Oct 23: Gilliland et al. request 175 FGS orbits to collect one trillion
photons from HD 17156. Observations to execute:
– Transit events: Nov 6 & 7, Dec 19
– Asteroseismology: Dec 21- Jan 2 (ten-day campaign)
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Oct 24: Gilliland proposal accepted
– Ron: “Yikes, now we have to do something fast!”
– Phase2: extreme orbit crafting by Merle Reinhart (thanks Merle!)
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Oct 29: NSSC-I up and operating on side-B
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Nov 25: Request to re-optimize FGS1r S-curves via AMA submitted to
HSTMO and GSFC HST Project.
– Approved week of 12/01, to execute Jan 23.
FGS Timeline, Sept 08 - Jan 09
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Nov 30: Phase 2 Proposal “Calibrating FGS1r OFAD, Second Epoch”
submitted. 18 orbits.
– Needed to execute before December 23 (M35 unavailable afterward), and
before FGS1r AMA re-optimization
– Executed successfully, Dec 12 - 20.
FGS1r OFAD, December 2008
FGS Timeline, Sept 08 - Jan 09
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All along, various Cycle 16 & 17 GO FGS proposals have been
executing as needed (primarily parallax and exoplanet measurements).
Approximate number of FGS science orbits in last 5 months: 720
< Sep 08
Sep
Oct
Nov
Dec
Jan
~170
51
118
122
316
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FGS Science
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The additional FGS visits solicited by STScI from UTx and GSU had
two prime constraints:
– Targets schedulable in two-gyro mode in the Dec to March time frame
– No long term projects being initiated
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UTx proposal used FGS1r in POS mode to revisit star field that had
been observed in the past for positional astrometry (parallaxes)
– Some targets hadn’t been observed for years
– Some targets had only been observed with FGS3 (not FGS1r)
– Late epoch visits will provide extremely accurate proper motion
measurements, which in turn improve parallax (and reflex motion
measurement if applicable).
– Observations generally succeeded. Guide star acquisition failures affected
one target at a particular Orient.
FGS Science
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GSU proposals used FGS1r in TRANS mode survey targets for
binarity, or to observe known binaries to update orbital elements.
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Targets initially were all high mass stars
– Proposal 11212 “Filling the Period Gap for Massive Binaries” (PI Gies).
– Binary “hit rate” appears to be approximately 30-40%
Proposal 11212
FGS1r detection of 0.5” binary
spectral type B1.5III
FGS Science
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GSU proposals used FGS1r in TRANS mode survey targets for
binarity, or to observe known binaries to update orbital elements.
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Targets initially were all high mass stars
– Proposal 11212 “Filling the Period Gap for Massive Binaries” (PI Gies).
– Binary “hit rate” appears to be approximately 30-40%
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Targets in first supplement (proposal 11901) were positive binary
detections from 11212 that could schedule in October - December.
– 47 targets
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2nd proposal “Binaries at the Extremes of the H-R Diagram”
– Targets include: high mass stars, LBVs, nearby low mass main sequence
stars, cool subdwarfs, and white dwarfs.
– Split into two phase2 proposals (11943 & 11944) because APT can’t
handle proposals with more than ~130 visits.
Proposal 11944
FGS1r measurement of DD G107-70 orbit
1996
2008
FGS Science
Gilliland proposal 11945:
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“Asteroseismology of Extrasolar Planet Host Stars”
– used FGS2 in POS mode to collect high S/N photometry of HD 17156
– goal: to collect one trillion photons to search for 10-15 of the highest
amplitude stellar oscillations.
– may result in knowledge of the stellar density (~1%) and age (5%).
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HD 17156 hosts a transiting planet. Transit light curve also provides
stellar density to ~1%, a good independent check on the
asteroseismology.
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Using FGS for this project required calibration of the FGS2 dark counts
and the 4 PMT deadtime constants.
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HST project had mild concerns about the PMT life time issues. Target
HD 15176 is a V=8.1 star, near the V=8 OLD restriction.
– Pre & post checks on Upgren69 were included to verify PMT health.
FGS2r S-curves, before & after 10 day campaign
Upgren69 FGS2r PMT counts decreased by ~0.2%
HD 17156 November Transit,
version 1
HD 17156 November Transit
version2
FGS1r AMA Adjustment
FGS1r AMA Adjustment
FGS1r AMA Adjustment
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Scheduled for week of Jan 19
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Prerequisites:
 Determination of AMA move (Goodyear) based upon recently obtained
FGS1r S-curves (from large science programs 11212, 11943, 11944)
 FGS1r OFAD re-calibration (proposal 11870), Dec 12 - 20, 2009
 Preparation of phase2 (11963) proposal to verify OFAD across AMA move,
and to provide data to update FGS1r-FGS alignment.
• Uses astrometric field in NGC 5617
 Identification of post-AMA move target star to verify FGS1r S-curves are
optimal (proposal 11964).
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Verify FGS1r POS mode acquisition after AMA move (11964)
FGS1r-FGS Alignment NGC 5617
FGS1r-FGS Alignment NGC 5617
Post AMA-adjustment verification star, HD 233877
• Standard FGS calibration star known to be single (point source)
• Well isolated, tolerant of FGS1r-FGS alignment errors.
TIPS/JIM
January 15, 2009
Agenda:
INS Division News (Jerry Kriss)
Five Busy Months for FGS (Ed Nelan)
The Critical Design Review for JWST’s NICSpec Instrument (Tracy
Beck)
Next TIPS/JIM: February 19, 2009
1
The NIRSpec Critical Design
Review
Oct 8th 2008 - Dec 11th 2008
T. Beck (& M. Stiavelli)
The NIRSpec CDR
• Quick NIRSpec instrument overview
• Brief Overview of ESA’s CDR process
and goals
• NIRSpec CDR Results
• Next Steps & Schedules
• Some Operational “Issues” of interest
NIRSpec Instrument Overview
“The most complicated
instrument ever to fly in
space”
• Multi-Object
Spectrograph Mode
(MOS) with an MSA
• Integral Field Unit (IFU)
• 4 Fixed Slits + 1 Broad
Aperture
JWST Focal Plane, NIRSpec tilted by 41.5o
R~100, 1000 and 3000
spectroscopy over 3
Bands:
I = 0.7 - 1.8mm
II = 1.7 - 3.0mm
III = 2.9 - 5.0mm
NIRSpec Instrument Overview
Reflective Surfaces CAA
FOR
Filter
(FWA)
RMA
(MSA/IFU/FS)
COLL
Grating
(GWA)
CAM
Detector
NIRSpec Instrument Overview
MSA Focal Plane
• 4 MSA Quadrants
• IFU Entrance
Aperture
• Fixed Slits
• New, 1.”6x1.”6 sq
aperture
• (IFU “Virtual Slit”
Positions)
ESA’s CDR Goals
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Verify that the instrument system performance will meet both the scientific
and functional requirements
Verify that the instrument detailed design is robust, shows adequate
margins, and is compliant with product assurance reqs
External and internal interfaces are defined/documented in the relevant ICDs
Instrument verification/test plans are realistic and adequate
The instrument level qualification plan is complete, satisfactory and complies
with the subsystem qualification plans.
The instrument schedule is realistic with adequate margin
The identified risks are thoroughly assessed with clearly defined mitigation
plans
PA practices are fully implemented
Ops concept is defined and is consistent with Flight SW architecture
Commanding and control of the instrument is properly defined in FSW
Critical technologies have been identified and performance demonstrated.
ESA’s CDR Process
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CDR Board + 5 “Panels”
Document Delivery to Panel and Board members (late September 2008)
CDR “Kickoff” Meeting = 1 day of instrument presentations, 1 day of face-toface meeting with the panels (Oct. 8-9, 2008)
Panel members are tasked with identifying “Review Item Discrepancies”
(RIDs) = discrepancies/inconsistencies/errors in documentation, design or
instrument performance vs. requirements
One month of document reading with weekly telecons between panel
members - RIDs continuously input into online tracking system.
Colocation Meeting - All RIDs from all panels discussed among the large
group and actions determined
Board Meeting - Final presentations on findings, issues from RIDs flagged
with actions noted. (Dec. 11th 2008).
Final Board Report released to team (yesterday!)
ESA’s CDR Process
ESA’s CDR Process and Goals
(T. Beck)
Panel # 1
SYSTEM PANEL (SP)
R. Meynart
G. Bagnasco
(M. Stiavelli)
Board
PANEL # 2
MECH-THERMAL PANEL( MP)
R. Bureo
J.C. Salvignol
PANEL # 3
OPTICAL PANEL (OP)
B. Harnish
M. Te Plate
PANEL # 4
ELEC-SW PANEL (EP)
F. Marliani
P. Rumler/P. Strada
PANEL # 5
PA PANEL (PP)
M.v. Eesbeek
M. Falcolini
System Design
Structure Design
Optical Design
Electrical Design
Quality Assurance
Overall Science & Func Perfo
Mechanicms Design
Relevant Perfo
Harness Design
Product Assurance
Calibration
Thermal Design
OGSE
SW Design
Cleanliness & Contamination
Operations
Relevant Perfo
Relevant AIV
Relevant Perfo
Risk Management
FDIR
MGSE
EGSE
Safety
Budgets
Relevant AIV
Relevant AIV
Schedule
Overall AIV
• ESA led review, co-chaired by NASA Independent Review Office
• 18 Board members from ESA , NASA and STScI
• 60 Panel members from ESA , NASA, IST, and STScI
NIRSpec CDR Results
• During the Reviews, Panels came up with a total of:
– 192 RIDS
• 70 RIDS Classified as “Major”
• 92 RIDS Classified as “Minor”
• ALL RIDS have either been Closed or accepted with a
well defined action
• NO Items were elevated to the Board for Resolution
• (At the time of the NIRSpec Instrument CDR, the MSS
subsystem had not had it’s CDR - this is taking place
TODAY & TOMORROW at GSFC)
NIRSpec CDR Results
• Issues Highlighted by the CDR Board:
– Grating Wheel Assembly (GWA) Wavefront Error is significantly out
of spec - continued troubleshooting, updates in budgets
– Refocus Mechanism Assembly (RMA) deforms at cryogenic
temperatures causing WFE (coated on back, have SiC backups)
– Board requests a report by February 2009 on the recent failure of
the RMA gearbox lifetime testing
– HAWAII 2RG performance - Detector Noise and sensitivity
degradation due to radiation damage still not established
– MSS CDR delayed until January - after NIRSpec CDR, which
resulted in a lack of proper documentation on the MSS. Board
requests a report by Feb. 2009 on conclusions from the MSS CDR incl. clear analysis of MSS problems and qualification plans/status.
– Schedule delays in some elements (e.g., GWA) will impact flight
model tests - now planned to perform FM cryo tests in two phases.
NIRSpec CDR Results
• Issues Highlighted by the CDR Board:
– Stray light reduction mask - out of field stray light may be blocked
by a static, oversized pupil mask positioned in front of the FWA,
board endorsed feasibility study for implementing such a mask.
– Concern regarding software validation flow from ICE/MSS/DS
through to ISIM level, recommends that the project define and
describe in detail an appropriate NIRSpec FSW validation
process based on top-level requirements.
– Performance Budgets are not yet consolidated and verified with
measurement values - requests that budgets are maintained and
updated systematically as new data become available. (incl.
GWA WFE, FOR WFE, Detector noise/sensitivity/dark current).
– Total of 70 actions assigned to Astrium, ESA and NASA on
“Major” RID items - (many = updates to qual plans and
verification matrix for consistency with test plans)
NIRSpec CDR Results
• Total of 70 actions assigned to Astrium, ESA and NASA
on “Major” RID items, including:
– many = updates to qual plans and verification matrix for
consistency with test plans, error budgets
– Report from NASA on Prasedymium-Iron-Boron for use in the
MSS magnet arm, risk due to corrosion, brittleness,
contamination and loss of magnetic strength
– Confirmation that acrylic adhesive Y966 can be used at cryotemperature (reports of risk due to lack of adhesion)
NIRSpec CDR Results
• CDR Board Conclusions:
– The NIRSpec CDR will be satisfactorily
concluded when the recommendations
highlighted (previously) and actions from
the CDR panel teams have been
addressed and concluded.
– The board requests a report on the
status of the identified major issues and
RID actions by May 2009.
NIRSpec - The Future
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DM (Demonstration Model) ambient tests ongoing, cryotests in
Spring 2009 (Focal plane detector at MSA plane)
FM (Flight Model) plan with schedule mitigation has been developed
– Main deliveries: grating wheel assembly, filter wheel assembly, microshutter subsystem, detector subsystem
– Plan for dual cryogenic test with intermediate refurbishing
– Likely to be implemented for grating wheel
Old Baseline (1 Cryo test)
New Baseline 2 Cryo Tests
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The PLAN:
NIRSpec DM (ETU) Delivery in
July 2009 (26d contingency)
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NIRSpec FM mid 2010 delivery
to GSFC (40d contingency)
NIRSpec -Operational “Issues”
of Interest
• MSA = A complicated component!
– Stuck open/closed shutters
From T. Boker’s presentation at CDR Kickoff
NIRSpec -Operational “Issues”
of Interest
NIRSpec -Operational “Issues”
of Interest
NIRSpec -Operational “Issues” of Interest
NIRSpec -Operational “Issues”
of Interest
• “Plugging” moves quadrants into useable space (NOTE: most of the MSA quads considered for
flight aren’t quite as bad as the ENG-grade
images presented in images here)
NIRSpec -Operational “Issues”
of Interest
• MSA Quad lifetime tests show that shutters can
become stuck open/closed during operations,
after many moves of the MSA magnet arm
– MSA open/closed shutters may change over time!
– MSA Quadrant heating (heat to ~270K) unsticks the
shutters and returns the MSA to it’s nominal
performance
– MSA Quadrant heating may need to take place after
every ~2000 moves (TBD/TBR!)
– NIRSpec will be unusable during the heating process
(nominal duration TBR!, but on order of ~15hrs).
– We may need an updatable map of stuck open/closed
shutters that can be updated in the APT MSA planning
tool