aas 201 - don figer january 9, 2003 the jwst detector characterization project in the independent...
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AAS 201 - Don Figer January 9, 2003
The JWST Detector Characterization Project
in the Independent Detector Testing Laboratory
Don Figer, STScI/JHUJanuary 9, 2003
AAS 201Seattle, WA
AAS 201 - Don Figer January 9, 2003
1.E-04
1.E-03
1.E-02
1.E-01
1.E+00
1.E+01
1.E+02
0.1 1 10
Wavelength [m]
Sig
na
l [e
-/s
ec
/pix
]
Zodiacal Light
Sunshield
JWST requirement
JWST goal
R=5
R=1000
0
1
2
3
4
2 4 6 8
Read noise per exposure [electrons]
Du
rati
on
of
DR
M N
IR O
bs
erv
ati
on
s [
yrs
]
Images
Spectra
Dark current =
0.126 e /sec
0.020 e /sec
0.003 e /sec
Detectors Are Important for JWST
AAS 201 - Don Figer January 9, 2003
JWST NIR Detector Requirements
AAS 201 - Don Figer January 9, 2003
IDTL Role inJWST Detector Program
AAS 201 - Don Figer January 9, 2003
Past and present personnel
Eddie BergeronData Analyst
Mike TelewiczIntern
Gretchen GreeneMechanical Engineer
Monica RiveraIntern
Russ PeltonTechnician
Tom ReevesLab Technician
Bernie RauscherProject Scientist
Steve McCandlissJHU Lead
Scott FelsIntern
Sito BallezaSystems Engineer
Robert BarkhouserOptical Engineer
Utkarsh SharmaGraduate Student
Ernie MorseData Analyst
Don FigerDirector
Mike ReganSystem Scientist
AAS 201 - Don Figer January 9, 2003
IDTL Test System
Controller Electronics
Vacuum Hose
He Lines
EntranceWindow
Dewar
AAS 201 - Don Figer January 9, 2003
Hawaii 1R with 5.0 mu Cutoff
AAS 201 - Don Figer January 9, 2003
Rockwell & Raytheon 2K Devices
AAS 201 - Don Figer January 9, 2003
IDTL Measurements: Dark Current
Lowest measured dark current is ~0.006 e/s/pixel.
AAS 201 - Don Figer January 9, 2003
Read noise is ~10 e for large number of reads. (system read noise is ~2.5 e)
IDTL Measurements: Read Noise
AAS 201 - Don Figer January 9, 2003
IDTL Measurements: Gain
AAS 201 - Don Figer January 9, 2003
Hawaii 1R with 5 um Cutoff
AAS 201 - Don Figer January 9, 2003
IDTL Test System
AAS 201 - Don Figer January 9, 2003
QE measurements have an accuracy of ~10%.
IDTL Measurements: AQE
AAS 201 - Don Figer January 9, 2003
Relative QE maps show significant variations across field
IDTL Measurements: RQE