MIT/Lincoln Labs CCID20 W89C1 CCD Test Results

This phase 2 MIT/Lincoln Labs 2Kx4K CCD has the improved backside treatment, but unfortunately it also has a very hot pixel. If the hot pixel can be reduced this might be a fairly good device. A summary report is available. Noteworthy points about this CCD include:

Original postscript files are available from our anonymous ftp server and these provide better resolution and clarity than is usually possible on a web page. Here are a few figures to illustrate device highlights:

This graph shows the QE variations caused by the brick wall pattern. QE was measured at the peak and in the valley of the brick wall (dotted lines) as well as over a large area to obtain an average QE (solid line). The variation is small.

This dark frame shows the hot pixel. Charge bleeds up and down the column during the integration. It might be possible to reduce or eliminate this hot pixel during integration by proper selection of parallel clock voltages. It will still inject significant charge during readout though.

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