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Evaluation of a PtSi Schottky infrared CCD for astronomy.

This paper presents the results of a preliminary evaluation of a platinum silicide (PtSi) Schottky CCD as an imaging array for astronomical applications. The work was done in the near-infrared (1.2 μm < λ < 2.5 μm) spectral regime, where there is presently a lack of commercially available panoramic arrays with acceptable performance. During an initial test run, the array detected a star of magnitude 3.5 using an integration time of 128 msec. Proper optimization of the readout electronics, cryostat configuration, and matching of the telescope image scale to the pixel size could allow detection of a source ~100 times fainter in a 1-sec integration time. This paper will discuss the array architecture, measurement and signal processing techniques, and the observatory and laboratory evaluation tests.