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The JWST Detector Characterization Project in the Independent Detector Testing Laboratory

The JWST Detector Characterization Project in the Independent Detector Testing Laboratory Don Figer, STScI/JHU January 9, 2003 AAS 201 Seattle, WA. 4. 1.E+02. Sunshield. Dark current =. -. 0.126 e. /sec. 1.E+01. -. 0.020 e. /sec. Spectra. 3. JWST requirement. -.

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The JWST Detector Characterization Project in the Independent Detector Testing Laboratory

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  1. The JWST Detector Characterization Project in the Independent Detector Testing Laboratory Don Figer, STScI/JHU January 9, 2003 AAS 201 Seattle, WA

  2. 4 1.E+02 Sunshield Dark current = - 0.126 e /sec 1.E+01 - 0.020 e /sec Spectra 3 JWST requirement - 0.003 e /sec 1.E+00 Images Duration of DRM NIR Observations [yrs] JWST goal Signal [e-/sec/pix] 2 1.E-01 R=5 1.E-02 Zodiacal Light 1 1.E-03 R=1000 0 1.E-04 2 4 6 8 0.1 1 10 Wavelength [mm] Read noise per exposure [electrons] Detectors Are Important for JWST

  3. JWST NIR Detector Requirements

  4. IDTL Role in JWST Detector Program

  5. Past and present personnel Tom Reeves Lab Technician Robert Barkhouser Optical Engineer Eddie Bergeron Data Analyst Bernie Rauscher Project Scientist Utkarsh Sharma Graduate Student Mike Telewicz Intern Steve McCandliss JHU Lead Ernie Morse Data Analyst Gretchen Greene Mechanical Engineer Scott Fels Intern Don Figer Director Monica Rivera Intern Sito Balleza Systems Engineer Mike Regan System Scientist Russ Pelton Technician

  6. IDTL Test System Controller Electronics Dewar Entrance Window Vacuum Hose He Lines

  7. Hawaii 1R with 5.0 mu Cutoff

  8. Rockwell & Raytheon 2K Devices

  9. IDTL Measurements: Dark Current • Lowest measured dark current is ~0.006 e-/s/pixel.

  10. IDTL Measurements: Read Noise • Read noise is ~10 e- for large number of reads. (system read noise is ~2.5 e-)

  11. IDTL Measurements: Gain

  12. Hawaii 1R with 5 um Cutoff

  13. IDTL Test System

  14. IDTL Measurements: AQE • QE measurements have an accuracy of ~10%.

  15. IDTL Measurements: RQE • Relative QE maps show significant variations across field

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