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Proceedings Paper

Reducing the read noise of HAWAII-2RG detector systems with improved reference sampling and subtraction (IRS2)
Author(s): Bernard J. Rauscher; Richard G. Arendt; D. J. Fixsen; Matthew Lander; Don Lindler; Markus Loose; S. H. Moseley; Donna V. Wilson; Christos Xenophontos
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Paper Abstract

IRS2 is a Wiener-optimal approach to using all of the reference information that Teledyne’s HAWAII-2RG (H2RG) detector array provides. Using a new readout pattern, IRS2 regularly interleaves reference pixels with the normal pixels during readout. This differs from conventional clocking, in which the reference pixels are read out infrequently, and only in a few rows and columns around the outside edges of the detector array. During calibration, the data are processed in Fourier space, which is close to the noise’s eigenspace. Using IRS2, we have reduced the read noise of the James Webb Space Telescope (JWST) Near Infrared Spectrograph’s (NIRSpec) H2RGs by 15% compared to conventional readout. We are attempting to achieve further gains by calibrating out a recently recognized non-stationary noise component that appears at the frame rate. Teledyne’s new HAWAII- 4RGs (H4RG) build in a flexible capability to interleave reference pixels. We eagerly look forward to applying IRS2 techniques to H4RGs when the opportunity arises.

Paper Details

Date Published: 25 September 2012
PDF: 11 pages
Proc. SPIE 8453, High Energy, Optical, and Infrared Detectors for Astronomy V, 84531F (25 September 2012); doi: 10.1117/12.926089
Show Author Affiliations
Bernard J. Rauscher, NASA Goddard Space Flight Ctr. (United States)
Richard G. Arendt, NASA Goddard Space Flight Ctr. (United States)
D. J. Fixsen, NASA Goddard Space Flight Ctr. (United States)
Matthew Lander, NASA Goddard Space Flight Ctr. (United States)
Don Lindler, NASA Goddard Space Flight Ctr. (United States)
Markus Loose, Markury Scientific, Inc. (United States)
S. H. Moseley, NASA Goddard Space Flight Ctr. (United States)
Donna V. Wilson, NASA Goddard Space Flight Ctr. (United States)
Christos Xenophontos, NASA Goddard Space Flight Ctr. (United States)


Published in SPIE Proceedings Vol. 8453:
High Energy, Optical, and Infrared Detectors for Astronomy V
Andrew D. Holland; James W. Beletic, Editor(s)

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