- The
first two flight CCDs delivered to Ball for packaging.
- IR
FPA Process Review completed.
- Discovered
a "pitch up" problem with the optical
bench alignment at the Ball WFAS and resolved this
metrology issue.
- IR
filter characterization completed for the baseline
set of filters selected by the SOC.
- The
GSE that caused the damage to the flight CCD has
been isolated and is being repaired.
November
2001
-
All planned flight detectors are delivered and in-house.
-
Flight detector testing is proceeding as quickly as possible to
support the detector enclosure build schedule. One flight CCD
was damaged during testing, and is being returned to Marconi for
analysis.
-
Optical bench integration proceeding well at Ball, but is somewhat
constrained due to resource contention with ACS returning to Ball
for a final RAS/HOMS test.
-
The first engineering Main Electronics Box completed.
-
IR cold enclosure passes qualification testing.
-
Descope planning process reactivated in response to continuing
budgetary pressures on HST.
October
2001
-
Successful installation and alignment of the optical bench onto the
WFAS system.
-
Detector electrical isolation issues resolved.
-
UVIS "air gap" filters successfully manufactured. Filter deliveries
continue are still late, but sufficient quantities are being delivered
to maintain schedule.
-
IR cold enclosure qualification testing under way.
-
Flight detector testing "heats up" at the DCL and at Ball (for the CCDs).
-
14th SOC meeting held at STScI for a successful CCD Detector Milestone
Review. The first pair of CCDs for the flight builds was selected.
The SOC reviewed and approved several internal descopes.
September
2001
-
The
optical bench was shipped to Ball at the start of the
month! This is a major milestone which enables the
Ball team to start integrating the optics, electronics,
and detectors. The next 12 months will be exciting
indeed, culminating in the delivery of the bench with
all the goodies back to GSFC for instrument-level integration.
-
Received
the last three engineering unit IR focal planes from
RSC. One of these devices, #31, is of exceptional quality
and is likely to be a flight unit. We have now received
all 12 of 12 engineering unit deliveries. Three flight
deliveries are expected next month.
-
The
flight spare IR enclosure has completed its qualification
testing.
-
Received
two additional Marconi flight CCD. Two were expected
and two were received. Marconi has now delivered 4 of
6 flight CCDs, with the rest expected next month.
-
The
TECFIRE subsystem tests revealed an anomaly that was
eventually traced to a bad solder joint. Processes
are being improved to prevent recurrence.
-
A
better adhesive has been identified for use with the
UVIS filters from Barr (to solve some structural concerns
with the air-gap design).
-
A
major system engineering effort to update the verification
matrix, risk list, and descope list has been completed.
-
Testing
of the optical bench has completed. All anomalies have
been traced to test setup issues, with the result that
the bench meets or exceeds performance requirements
in all areas. These additional tests have delayed the
bench shipment to Ball which had been scheduled for
the end of this month.
-
An
internal project integration readiness review was completed
for the Ball activities in the coming months.
-
The
IR filter followup telecon for the Filter Milestone
Review was completed successfully.
-
All
IR filters are received from the vendors.
-
UVIS
filter deliveries continue to be a challenging area.
In particular, the UV filter design with epoxy fill
is suspected to be the cause of throughput degradation,
and an air-gap design is being developed.
-
Some
of the requirements on the narrow-band UVIS filters
have been relaxed to help expedite delivery.
-
A
CCD Process Review was held to examine the processing
risks for installing the Marconi detectors into the
Ball enclosure. The recommendations are being incorporated
into our planning.
-
A
few weeks of the Marconi CCD testing for the high temperature
soak had been at 150C instead of 110C. This has been
corrected. The intermediate results look very encouraging,
with little change noticeable after 2 weeks of high
temperature soak.
-
IR
FPA #18 has completed characterization, and was shipped
to Ball for the IR Qualification Enclosure build.
-
The
Optical Stimulus work has moved from the GSFC Building
20 SLAC facility (deintegration and metrology) to the
Orbital facility in Beltsville for reintegration and
testing.
-
The
optical bench testing at GSFC revealed a few anomalies
which are being investigated.
-
The
first two (of six) Marconi flight CCDs arrive at the
DCL.
-
One
of the two Marconi “delivered” engineering devices has
been retained at Marconi for the high temperature soak
test at 110C.
-
Received
another three engineering unit IR focal planes from
RSC. These are of “almost” flight quality, and will
be handled in a manner that will allow them to be used
as flight devices if necessary.
-
Ball
took the first images of the IR surrogate detector (bare
mux) using the engineering model Detector Electronics
Box (DEB).
-
The
6-stage TECs were delivered to Ball for the IR enclosure.
There are some questions about their efficiency, and
additional units are being procured.
-
The
UVIS filter followup telecon for the Filter Milestone
Review was completed successfully. While we still have
some stragglers for the filters, the review panel has
expressed confidence that the normal processes within
the project will be successful at dealing with these
challenges.
- All
optics metallized coatings are completed.
-
The
optical bench arrives at GSFC! Vibration and metrology
tests have begun and look
great.
-
Marconi
delivers the first engineering units for WFC3, as well
as two red-coated devices for ACS (a little ahead of
schedule).
-
Received
another three engineering unit IR focal planes from
RSC. One of these is near
flight quality.IR FPA #15 tests at the DCL confirm
the ultra-low dark current. Other detailed
characteristics of this device have been measured and
are being discussed with RSC. Delays in the
IR Qualification Detector Enclosure need
date allows us to select a more recent RSC delivery,
FPA #18, for delivery to Ball for the build.
This will allow for more detailed testing on
FPA #15.
-
We
successfully held the first WFC3 Milestone Review for
the filters during the 13th SOC meeting on June
11-13. The SOC was pleased with the results. We will
have a followup meeting at the end of July after all
of the filters have been received.
-
All
powered optics received from Tinsley.
-
Optical
bench cold plate delivered to GSFC.
-
Optical
bench delayed to accommodate some rework.
-
RSC
delivered the last two IR muxes (with Kovar pins) to
the DCL. DCL characterized
mux M10, and delivered it to Ball for the IR Detector
Surrogate Enclosure.
-
CCD
devices #188 and #165 delivered to Ball for the CCD
Surrogate Enclosure.
-
CCD
#153 irradiated. Ready for post-irradiation characterization.
-
Meeting
held at Marconi to review the data packages for Batch
4 devices.
-
Working
with Barr on detailed prioritization and planning for
deliveries. The first IR filters arrived. UVIS
deliveries on-going.
-
After
failure of the ACS Fairchild CCDs in Build 3', the HST
Project decided to use 4 WFC3 wafers from Marconi
Batch 4 for ACS. These will be coated red and delivered
to ACS for Build 3''. Delivery is accelerated (by July)
to accommodate the ACS schedule. Impacts on WFC3 are
non-negligible but manageable, and are being assessed.
Net result is a delay of 2 months for
the final WFC3 flight devices (intermediate deliveries
are less affected).
-
Optical bench assembly is proceeding well. All the parts
have been made and are being assembled.
-
Delivery
to GSFC is scheduled for next month. (See our latest
images).
-
TECFIRE
Peer Review completed. All thermal systems designs are
now complete.
-
Received
3 engineering unit IR focal planes from RSC. One of
these devices is claimed to have extremely good dark
current (but somewhat low QE) according to RSC testing.
The DCL will confirm and provide feedback to RSC for
future lots. The 2 Kovar pin muxes for the IR surrogate
enclosure have been received and will be tested at the
DCL before delivery to Ball.
-
One
Marconi engineering device from Batch 4 has been measured.
All parameters are better than required for flight!
QE is not yet measured, pending completion of the test
setup commissioning. The charge injection feature has
been characterized for (front-side engineering device)
#152. Performance before irradiation is very promising.
It will be irradiated next month.
-
The
overall WFC3 Project schedule is being replanned for
the November 2003 launch. This replan will be completed
next month.
-
Final
design review for the Optical Stimulus completed.
-
Additional
flight-like packaged WFC3-1R muxes received. The first
flight engineering model deliveries renegotiated due
to lateness of Kovar pins. Deliveries staggered into
April. Testing at Rockwell show very promising results.
-
Marconi
Batch 3 devices did not make it through backside processing.
First deliveries delayed by one month.
-
Decided to use frontside Marconi devices for the UVIS
surrogate detector buildup (take out the SITe devices
from ACS "qual unit 2").
-
WFC3
program plan being reassessed given new phasing constraints.
-
Additional
CEB/DEB for the DCL descoped.
-
Instrument
grounding design started and being reviewed.
-
12th
SOC meeting at Ball. Discussed WFC3 milestone reviews
and descope plans. The next SOC meeting will be the
Filter Milestone Review in June.
-
Received
the first optics (IR M1 and M2) from Tinsley. They look
excellent.
-
Completed
the first fit checks of the Optical Bench mockup and
instrument Enclosure.
-
Flight
filter deliveries from the manufacturers started (to
JPL and GSFC for characterization).
-
Redundant
CSM ruled out. DCL reorganization started due to staffing
changes.
-
Characterization
of the first pin-grid array WFC3-1R multiplexers completed
and one device has been shipped to Ball for testing.
-
Received the first flight-like packaged WFC3-1R mux.
-
Marconi
Batch 3 devices look very promising after the first
cold tests.
-
Studies
being completed for a redundant CSM.
-
The
ACS/WFC3 "common spare" detector enclosure is in fabrication.
The Optical Bench mockup went to the AAS.
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