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&#34 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