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The James Webb Space Telescope will address the following questions:. What is the shape of the Universe? How do galaxies evolve? How do stars and planetary systems form and interact? How did the Universe build up it present elemental/chemical composition? What is dark matter?. - PowerPoint PPT Presentation
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1.What is the shape of the Universe? 2.How do galaxies evolve? 3.How do stars and planetary systems form and interact? 4.How did the Universe build up it present elemental/chemical composition? 5.What is dark matter?
The James Webb Space Telescopewill address the following questions:
INS Division JWST Training Series, Detectors - Don Figer 410/24/2002
Detectors are at the heart of allastronomical observations and are
important for JWST
INS Division JWST Training Series, Detectors - Don Figer 510/24/2002
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
INS Division JWST Training Series, Detectors - Don Figer 610/24/2002
JWST Detectors
~80 megapixels of flight-qualified detectors!!!
(~10 times all detectors on all
telescopes today)
HST HST HST
HST/NICMOS (all astronomical infrared detectors in space today!)
INS Division JWST Training Series, Detectors - Don Figer 710/24/2002
IR Arrays are “Hybrid” Sensors
PN junctions are “bump bonded” to a silicon readout multiplexer (MUX).
Silicon technology is more advanced than other semiconductor electronics technology.
The “bump bonds” are made of indium.
from: Bernard J. Rauscher, in “Detectors,” STScI Course on Infrared Instrumentation & Observing Techniques, 2000
INS Division JWST Training Series, Detectors - Don Figer 810/24/2002
NIRCam will use detectors from:Rockwell Scientific Company (RSC)/U Hawaii
~$500K per array!
2"
INS Division JWST Training Series, Detectors - Don Figer 910/24/2002
STScI Detector Test System
Controller Electronics
Vacuum Hose
He Lines
EntranceWindow
Dewar
INS Division JWST Training Series, Detectors - Don Figer 1010/24/2002
IDTL Detector Handling
INS Division JWST Training Series, Detectors - Don Figer 1110/24/2002
IDTL Personnel
