On-orbit experience with the Spitzer far infrared detectors

E. T. Young; G. H Rieke; M. Blaylock; J. Cadien; C. W. Engelbracht; K. D. Gordon; D. Kelly; K. Misselt; J. Morrison; J. Muzerolle; J. Stansberry; K. Y. L. Su; D. Fadda; D. Frayer; A. Noriega-Crespo; J. Rho

doi:10.1117/12.625545

29 August 2005 On-orbit experience with the Spitzer far infrared detectors

E. T. Young, G. H Rieke, M. Blaylock, J. Cadien, C. W. Engelbracht, K. D. Gordon, D. Kelly, K. Misselt, J. Morrison, J. Muzerolle, J. Stansberry, K. Y. L. Su, D. Fadda, D. Frayer, A. Noriega-Crespo, J. Rho

Author Affiliations +

Proceedings Volume 5883, Infrared Spaceborne Remote Sensing 2005; 58830P (2005) https://doi.org/10.1117/12.625545
Event: Optics and Photonics 2005, 2005, San Diego, California, United States

Abstract

The far-infrared detectors on the Multiband Imaging Photometer for Spitzer (MIPS) represent a significant advancement in both format and sensitivity. We describe some of the operational experience since launch in August 2003. MIPS has three infrared detector arrays, a 128x128 format Si:As impurity band conduction detector operating at 24 μm, a 32x32 format Ge:Ga array operating at 70 μm and a 2x20 format stressed Ge:Ga array operating at 160 μm. Since both germanium detectors utilize conventional bulk photoconductors, they are subject to a number of non-ideal behaviors that are inherent in these types of devices when operated in ultra-low backgrounds. The principal problems are nonlinear time response, changing responsivity in a radiation environment, and flux non-linearities. We describe observing strategies that are used on MIPS to minimize the impact of these effects.

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E. T. Young, G. H Rieke, M. Blaylock, J. Cadien, C. W. Engelbracht, K. D. Gordon, D. Kelly, K. Misselt, J. Morrison, J. Muzerolle, J. Stansberry, K. Y. L. Su, D. Fadda, D. Frayer, A. Noriega-Crespo, and J. Rho "On-orbit experience with the Spitzer far infrared detectors", Proc. SPIE 5883, Infrared Spaceborne Remote Sensing 2005, 58830P (29 August 2005); https://doi.org/10.1117/12.625545

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KEYWORDS

Sensors

Germanium

Photoresistors

Infrared sensors

Calibration

Detector arrays

Infrared radiation

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