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Transcript 
JWST Fine Guidance Sensor
Status of Testing the
FGS ETU
Pierre Chayer, André Martel, Kevin Volk,
Sherie Holfeltz, Alex Fullerton, Ed Nelan
May 20, 2010
1
FGS and Optical Telescope Element
Pick-Off Mirror
Focus Mirror
Detectors
100 mm
TMA Mirrors
2m
May 20, 2010
2
FGS Optical Assembly
May 20, 2010
3
FGS Test Configuration
May 20, 2010
4
Optical Ground System Equipment (OGSE)
Adjusting cell &
optical fibers
Al Interface plate Telescope tower
May 20, 2010
Cable support structure
5
OGSE Point Sources
Type 1: 0.8 to 2.5 μm
Type 2: 0.8 to 2.5 μm, ± 40 μm travel
May 20, 2010
6
FGS ETU Test Setup
May 20, 2010
7
FGS Detector Assembly
May 20, 2010
8
FGS ETU
May 20, 2010
9
FGS ETU
May 20, 2010
10
David Florida Laboratory TV3 Chamber
May 20, 2010
11
Cryo-Vac Test Configuration
port 14
(top of chamber)
DFL supplied grounding
wire, fixed to aluminum
base plate
common
grounding bar
B
16 x 16 tent
port 7
(side of chamber)
ports 4 & 5
(lower side of chamber)
FVTS Gro u n d
Eq u ip m e n t Ra ck
DHAS/
Ro se Re m o te
te rm in a l
FVTS Flig h t
Ra ck
unit under test ground
OGSE
EM EU
Rackmount
OGSE co n tro l
ta b le /ESD m a t
Eclip se Clie n t
ETU EU
12 x 12 tent
ITAR Cage
pass thru
opening in wall
TFI
heaters
DCpower
supply
Contam.
Heaters
DCpower
supply
PRD
ESD sensitive area
, ensure all
ESD protective measures are
followed within boundry
ThermalChamber
Facility ESD
ground point
Shelving unit
May 20, 2010
12
May 20, 2010
4/8/2010 0:00
4/7/2010 0:00
4/6/2010 0:00
4/5/2010 0:00
4/4/2010 0:00
4/3/2010 0:00
4/2/2010 0:00
4/1/2010 0:00
3/31/2010 0:00
3/30/2010 0:00
3/29/2010 0:00
3/28/2010 0:00
3/27/2010 0:00
3/26/2010 0:00
3/25/2010 0:00
3/24/2010 0:00
3/23/2010 0:00
3/22/2010 0:00
3/21/2010 0:00
3/20/2010 0:00
3/19/2010 0:00
3/18/2010 0:00
Temperature (K)
Thermal Results Details
ETU CVAC Test - Run #3
300.00
250.00
KM Average
200.00
IP Average
FGS Average
150.00
OGSE Average
100.00
Aluminium
Plate Average
DiodePlatAvg
50.00
DiodeGHeAvg
DiodeMainAvg
0.00
Date
13
FGS ETU CVAC Plan
• Focus Sweeps: Best Focus Position.
• Performance
• Tracking
• Fine Guiding
• Demonstration
• Acquisition
• Identification
May 20, 2010
14
Full Frame Image Light Check
For Normal gain, the Big Square is fully saturated on the first frame
and the perimeter is fully saturated by the second frame…
4
1366_FGSG2_ETU_IMGFUNC_FF_6_498_S_2010-03-25T13h47m35 (1)
x 10
200
6
200
400
400
1366_FGSG2_ETU_IMGFUNC_FF_6_498_S_2010-03-25T13h47m35 (2)
6
600
800
800
4
Row (pixels)
Row (pixels)
5
600
1000
1200
3
1600
1600
1800
1
1800
400
May 20, 2010
600
800 1000 1200
Column (pixels)
1400
1600
1800
2000
4
3
1200
1400
2
200
5
1000
1400
2000
4
x 10
2000
0
2
1
200
400
600
800 1000 1200
Column (pixels)
1400
1600
1800
2000
0
15
OGSE On
Raw and CDS(2-1) MOSAIC of OGSE spots.
All spots except for 2-7 visible.
4
1371_MOSAIC_raw
1371_MOSAIC_cds
x 10
200
400
0.0
2000
6
200
1800
400
1600
5
2-6
600
2-9
2-3
600
1400
8004
1200
500.0
2-1
2-4
1000.0
1000
Row (pixels)
Row (pixels)
800
2-5
1200
1000
1000
3
1200
800
1500.0
1400
2-A
2-7
14002
600
2000.0
1600
0.0
500.0
1000.0
1500.0
1600
2000.0
400
1
1800
1800
2000
2200
2400
May 20, 2010
2600
2800 3000 3200
Column (pixels)
3400
3600
3800
4000
2000
0
200
2200
2400
2600
2800 3000 3200
Column (pixels)
3400
3600
3800
4000
0
16
Acquisition
1811_FGSG2_ETU_ACQDEMO_6_498_S_2010-03-31T16h16m48 CnS1
1811_FGSG2_ETU_ACQ2_6_498_S_2010-03-31T16h16m49 CnS1
7000
7000
5
6000
10
5000
5000
40
Row (pixels)
6000
20
4000
15
3000
Row (pixels)
20
4000
60
2000
25
1000
3000
30
80
5
2000
100
10
15
20
Column (pixels)
25
30
0
ACQ2
1000
120
20
40
60
80
Column (pixels)
100
120
0
ACQ 1
May 20, 2010
17
Tracking & Fine Guiding
14000
12000
10000
8000
TRK1
(1863)
6000
FG2
(1866)
4000
FG1
(1864)
2000
0
May 20, 2010
0
2000
4000
TRK2
(1865)
6000
8000
10000
12000
14000
16000
18
64x2048 Strip Mosaic
This test produced all 32 strips in the FITS file ok.
4
(64x2048) Mosaic [1369_FGSG2_IMGFUNC_FULLSTRIP_6_498_S_2010-03-25T15h52m24]
x 10
6
200
400
5
600
Row (pixels)
800
4
1000
3
1200
1400
2
1600
1
1800
2000
1000
May 20, 2010
2000
3000
4000
Column (pixels)
5000
6000
7000
8000
0
19
Background level
May 20, 2010
20
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