"data contained herein is exempt from itar regulations under cfr 125.4(13) -- data approved for...
TRANSCRIPT
25 June, 2002 WFC3 Monthly Status Review 1"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
WIDE FIELD CAMERA 3HOME PAGE: wfc3.gsfc.nasa.gov
TIPS – June 27, 2002
IR Filter Wheel
UVIS Surrogate Detector
Flight SOFA
25 June, 2002 WFC3 Monthly Status Review 2"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
• STScI work– Mini-Handbook completed (M. Giavalisco, ed.) and
in SOC review/comment phase– Ground system development on schedule– UVIS and IR test images received last week from Ball
• Good implications for test benches/simulators/FSW• Key element for maintaining STScI work flow• Close to starting timing tests on benches for ops software
– Ongoing analysis and calibration• Stiavelli and Hartig ready to support encircled energy test• Robberto et al supporting detector characterization• Reid/Bartko/Kutina -- science ground cal plan• Lupie working filter issues
STScI Highlights
25 June, 2002 WFC3 Monthly Status Review 3"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
• Optics bench buildup at Ball on schedule for late August shipment to GSFC– IR/UVIS corrector mech and UVIS surrogate detector
– SOFA received from Moog (flight qual complete)
– IR surrogate ready for bench (IR qual has vacuum)
• GSFC preparations– Enclosure buildup and testing on track
– Stimulus assembled and getting ready for Therm Vac
– VCHP thermal vac complete
• Schedule metric value for May is 44% against the SM4 launch date of March 1, 2004
Instrument Assembly Highlights
25 June, 2002 WFC3 Monthly Status Review 4"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Instrument Level I&T Flow at GSFCJamie Dunn
Start Elec Integ. on Flt Enclosure
Crew Familiarizations
Deliver to HST
Optical Assy Integration
Match Mate Fit CheckPerformance Test
Integrate Flight Detectors
Complete Elec Integration
Metrology & WSIPE fit check Acoustic Test
Magnetic SurveyEMI / EMC Test
Mass PropertiesTB / TV and Calibration
Ship to KSC
WFC3 SMGTHFMS Fit Check
LaunchIntegrated SMGT
25 June, 2002 WFC3 Monthly Status Review 5"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Optical Assembly Integration ProgressMark Bergeland
Deliver OA to GSFCDeliver OA to GSFCUVM2
IR Fold Mirror
Optical Bench in WFAS
Selectable Optical Filter Assembly (EMU)
Alignment Cubes
Chief Ray Target Plate
UVM1 UVIS Corrector Mechanism
IRM1
Pickoff Mirror
UVIS Detector Assy Surrogate
03 10 17 24SEP ‘01SEP ‘01 01 08 15 22 29
OCT ‘01OCT ‘01 05 12 19 26NOV ‘01NOV ‘01 03 10 17 24
DEC ‘01DEC ‘01 31 7 14 21 28JAN ‘02JAN ‘02 04 11 18 25
FEB ‘02FEB ‘02MAR ‘02MAR ‘02
04 11 18 2501 08 15 22 29
APR ‘02APR ‘02MAY ‘02MAY ‘02
06 13 20 2703 10 17 24
JUN ‘02JUN ‘02JUL ‘02JUL ‘02
01 08 15 22 2905 12 19 26
AUG ‘02AUG ‘02SEP ‘02SEP ‘02
02 09 16 23 30
IR Detector Assembly Surrogate
Calibration Subsystem
IR Corrector MechanismIRM2
Mini-Stimulus Alignment in WFAS
Channel Select Mech (CSM)
UVIS Shutter Assembly
Optical Bafflesand UVISPost-Flash
Flight SOFA
IR Cold Enclosure Assembly
Refractive Corrector Plate (RCP)
Cold EnclosureIR Filter Wheel
25 June, 2002 WFC3 Monthly Status Review 6"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
IR Filter Wheel Populated
BlankF160W
F125W
G141
F110W
F105W
F098W
G102
F093M
F153MF139M
F127M
F128N
F130N
F132N
F126N
F167N
F164N
25 June, 2002 WFC3 Monthly Status Review 7"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Detectors Continue To Progress Well Through Assembly
Flight UVIS-1
Flight UVIS-2
– Completed base disc assembly
– Sealed base disc assembly to external ring assembly
– Began base disc assembly
25 June, 2002 WFC3 Monthly Status Review 8"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
IR Detector Hardware
Qual assy after vacuum acquisition and pinchoff
Surrogate assy integration is nearly complete
25 June, 2002 WFC3 Monthly Status Review 9"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
IRM2 Alignment Fixture and Bench Installation
View From IR Detector
Mechanism Side View
Alignment FixtureReticle Mirror
Alignment FixtureZ ReferenceTooling Ball
CorrectorMechanism
25 June, 2002 WFC3 Monthly Status Review 10"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Completed VCHP Performance Thermal Vacuum Test
Optical Bench Cold Plate
VCHP/CCHP Interface
VCHP and Reservoir
Main Radiator Simulator
25 June, 2002 WFC3 Monthly Status Review 11"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
CASTLE TELESCOPE
RIAF
OFF-LOAD FIXTURE
ISOLATION CRADLE
ELECTRICAL CABLES
CASTLE Integrated to the RIAF
POINT TARGET ASSEMBLY
CATHETOMETER
STEERING MIRROR ASSEMBLY
BALANCE WEIGHTS
25 June, 2002 WFC3 Monthly Status Review 12"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
• Electronics Boxes behind– Parts shortages being worked; GSFC assuming some
• IR detector performance– HST Project has agreed to Lot 7 at Rockwell– Installing IR#32 (low QE part into Build 1)
• TECFIRE– Redesign complete with review on 1 July– Uses 18 (originally 3) TECs with conductive felt
(GELVET)• Possible problem with pinholes in UV filters
– Being assessed but may require in-situ painting
Problem Areas
25 June, 2002 WFC3 Monthly Status Review 13"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
GSFC and Ball Are Splitting The Remaining Electronics Effort
Bob Parizek
HST
Power
Command/
Housekeeping RIU
LVPS
Control
Section
Support
Electronics
Section
UVIS CEB
IR DEB
Housekeeping Data (Thermistors)
CalibrationLamp Controller
Optical AssyCSM
Correctors (2)IR Filter WheelUVIS Shutter
SOFA
Cal Lamps
Science Data
Formatter
ThermalControllers (4)
& RadiatorTEC
1. Only one side shown2. Cross-strapping not shown3. Not shown: - RIU Expander Unit - Heater Power Distribution Box
UVIS Detector
IR Detector
Filter Box
Filter Box
MEB
= redundant boxes
= redundant circuitry on the PWAs
SOFA Relay
Responsibility color code:
GFE GSFC Builds/Tests Ball DesignBall Delivers Functional UnitBall Delivers Tested Unit
25 June, 2002 WFC3 Monthly Status Review 14"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
IR Detector Status
• In May, IPT and SOC believed that Lot 6 parts were acceptable– QE problem solved but noise still high– Subsequent DCL testing shows very poor stability over many hours
• Ball overheated IR FPA#50 (50C limit; reached ~75C)– Science IPT and SOC selected FPA #32 is the best device for IR Build 1,
due to the uncertainty in our ability to calibrate a device like FPA #50• We have 3 other Lot 6 parts (only 1 other part similar to #32)
– A second full process review at Ball week of July 8 or 15
• IR FPA Lot 7 starting at Rockwell Scientific– Well understood why Lot 6 QE much improved– Good reason advanced why #32" have much better stability– These involve separate process steps physically well separated in detector– Expect delivery to DCL in October and to Ball in early January
• Has schedule implications for thermal vac and ground calibration
25 June, 2002 WFC3 Monthly Status Review 15"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
IR Detector QE
25 June, 2002 WFC3 Monthly Status Review 16"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
TECFIRECornelis de Kramer
Original(Soldered)
New(Solderless)
25 June, 2002 WFC3 Monthly Status Review 17"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Original Design With Solder Interfaces To TECs
TECs
Radiator Heat Pipes
Soldered Interfaces
25 June, 2002 WFC3 Monthly Status Review 18"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Non-Loaded TEC ConfigurationWith GELVET
TEC Housing w/Flexures (titanium)
Bevel Washers (8x)
Interface to Flex Pipe(Aluminum)
Interface to Radiator HP(Aluminum or Copper?)
IR Detector Flex HPCondenser Saddle
Spreader/U HP
25 June, 2002 WFC3 Monthly Status Review 19"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Dual substrate filter with gap – UVIS 15(F300X). Pinholes were found by Barr in UVIS 1,2,and 15 and ‘painted’ over.
Single substrate filter – UVIS 03 (F275W), Pinholes found before and after installation in filter wheel and thermal vacuum cycles at Moog.
Thin Aluminum coating
Thin Aluminum type coatings used in some UV filters are highly susceptible to pinholes
UVIS-UV Filter Construction
25 June, 2002 WFC3 Monthly Status Review 20"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
UV Filters Transmission Curve
WFC3 Wide UV Filters
0
0.1
0.2
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
1500 2000 2500 3000 3500 4000 4500
Wavelength (A)
Tra
ns
mis
sio
n
F300XF275W
F218W
F225W
UVIS 03(F275W) UVIS 15
(F300X)
25 June, 2002 WFC3 Monthly Status Review 21"Data contained herein is exempt from ITAR regulations under CFR 125.4(13) -- data approved for public disclosure."
Pinhole Assessment Ongoing