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15 June 20061024 x 1024 Si: as IBC detector arrays for MID-IR astronomy
1K x 1K Si:As Impurity Band Conduction (IBC) arrays have been developed by
Raytheon Vision Systems for the James Webb Space Telescope (JWST) Mid-Infrared Instrument (MIRI). These devices are also suitable for other low-background applications. The Si:As IBC detectors have a pixel dimension of 25 μm and respond to infrared radiation between 5 and 28 μm. Detector performance results are discussed, including response and dark current as a function of detector bias and relative spectral response. The features of the matching 1024 x 1024 Readout Integrated Circuit (ROIC) features are discussed. Noise data from the University of Rochester are shown with the ROIC operating at 7 K. Sensor Chip Assembly (SCA) data are presented showing noise, response uniformity, and dark current.
Design details of a companion 1024 x 1024 array suitable for high-background, ground-based astronomy will also be revealed for the first time. This array will have a large well capacity and be capable of high frame rates.
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Peter J. Love, Eric J. Beuville, Elizabeth Corrales, John J. Drab, Alan W. Hoffman, Roger S. Holcombe, Nancy A. Lum, "1024 x 1024 Si:As IBC detector arrays for mid-IR astronomy," Proc. SPIE 6276, High Energy, Optical, and Infrared Detectors for Astronomy II, 62761Y (15 June 2006); https://doi.org/10.1117/12.684504