16 November 2000 InSb arrays for IRAC (infrared array camera) on SIRTF (Space Infrared Telescope Facility)
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Abstract
SIRTF requires detector arrays with extremely high sensitivity, limited only by the background irradiance. Especially critical is the near infrared spectral region around 3 micrometers , where the detector current due to the zodiacal background is a minimum. IRAC has two near infrared detector channels centered at 3.6 and 4.5 micrometers . We have developed InSb arrays for these channels that operate with dark currents of < 0.2 e/s and multiply-sampled noise of approximately 7 e at 200 s exposure. With these specifications the zodiacal background limited requirements has been easily met. In addition, the detector quantum efficiency of the InSb devices exceeds 90% over the IRAC wavelength range, they are radiation hard, and they exhibit excellent photometric accuracy and stability. Residual images have been minimized. The Raytheon 256 X 256 InSb arrays incorporate a specially developed (for SIRTF) multiplexer and high-grade InSb material.
© (2000) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Judith L. Pipher, William J. Forrest, William J. Glaccum, Robert G. Benson, Danny J. Krebs, Murzy D. Jhabvala, Joseph P. Rosbeck, Nancy A. Lum, W. Y. Lum, James D. Garnett, Alan W. Hoffman, George Domingo, G. Mark Cushman, David A. Rapchun, "InSb arrays for IRAC (infrared array camera) on SIRTF (Space Infrared Telescope Facility)", Proc. SPIE 4131, Infrared Spaceborne Remote Sensing VIII, (16 November 2000); doi: 10.1117/12.406544; https://doi.org/10.1117/12.406544
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