We describe the design, construction, and performance ofthe 32x32 Ge:Ga imaging array being built at the University of Arizona for the Multiband Imaging Photometer for SIRTF(MIPS). The array will support a number ofoperational modes in the MIPS instrument including natural background-limited mapping at 70 rim, super-resolution observations at 70 rim, and spectral energy distribution measurements between 50 and 100 m. The array is constructed in a modular manner using eight 4x32 pixel building blocks. To meet the sensitivity and stability requirements, the array must have excellent photometric repeatability, low noise, and robustness to the effects ofthe ionizing radiation environment in space. Key elements in attaining this level ofperformance are the Ge:Ga detectors materials and the cryogenic CRC-696 readout electronics. We present laboratory data for a 16x32 prototype ofthe array, and describe the plans for the construction of the qualification and ifight units.
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