The James Webb Space Telescope will address the
The James Webb Space Telescope will address the following questions: 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?
Detectors are at the heart of all astronomical observations and are important for JWST INS Division JWST Training Series, Detectors - Don Figer 4 10/24/2002
Detectors Are Important for JWST 4 Duration of DRM NIR Observations [yrs] 1. E+02 Sunshield Signal [e-/sec/pix] 1. E+01 JWST requirement 1. E+00 JWST goal 1. E-01 R=5 1. E-02 Zodiacal Light 1. E-03 Dark current = 0. 126 e - /sec 0. 020 e - /sec 0. 003 e - /sec 3 Spectra Images 2 1 R=1000 0 1. E-04 0. 1 1 2 10 Wavelength [mm] INS Division JWST Training Series, Detectors - Don Figer 4 6 8 Read noise per exposure [electrons] 5 10/24/2002
JWST Detectors HST/NICMOS (all astronomical infrared detectors in space today!) HST HST ~80 megapixels of flightqualified detectors!!! (~10 times all detectors on all telescopes today) INS Division JWST Training Series, Detectors - Don Figer 6 10/24/2002
IR Arrays are “Hybrid” Sensors l PN junctions are “bump bonded” to a silicon readout multiplexer (MUX). l Silicon technology is more advanced than other semiconductor electronics technology. l The “bump bonds” are made of indium. from: Bernard J. Rauscher, in “Detectors, ” STSc. I Course on Infrared Instrumentation & Observing Techniques, 2000 INS Division JWST Training Series, Detectors - Don Figer 7 10/24/2002
NIRCam will use detectors from: Rockwell Scientific Company (RSC)/U Hawaii ~$500 K per array! 2" INS Division JWST Training Series, Detectors - Don Figer 8 10/24/2002
STSc. I Detector Test System Controller Electronics Dewar Entrance Window Vacuum Hose He Lines INS Division JWST Training Series, Detectors - Don Figer 9 10/24/2002
IDTL Detector Handling INS Division JWST Training Series, Detectors - Don Figer 10 10/24/2002
IDTL Personnel INS Division JWST Training Series, Detectors - Don Figer 11 10/24/2002
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