Detector Assembly Design Pedestal Cold Strap Interface Cable SCA Motherboard Attachment Feet 51 Pin Electrical Connector Cover/Baffle Package designed for low thermal conduction to surrounding structure

Relative Spectral Response Comparisons Baseline wafer 9601 Contingency wafer 9581 Hanger queen wafer (SIRTF-like material)

Alternate Material Read Noise at 7.1 K Measured by University of Rochester "The integration time was 25 sec for all Fowler sampled images. Please note that one box was in a region that gave consistently higher noise which is due to excess row-banding in the first 80 rows. There is an occasional second point with higher noise due to cosmic ray hits (which were not filtered out). Therefore, we feel it is valid to ignore the 1-2 points outside the major groupings at each sampling." Dr. Craig McMurtry, University of Rochester 10 e- (Fowler-8) ~50% lower noise than SIRTF/IRAC

Standard Material Read Noise at 30 K Measured by University of Rochester "Noise data were obtained using the box average method. The integration time was 100 seconds for all Fowler sampled images in these data. For the data at 30K, the capacitance was measured to be 32.1 fF." Dr. Craig McMurtry, University of Rochester 2 e- (Fowler-32)

Floorplan for Aquarius 1024 x 1024 Readout Column shift register Row shift register 8 or 32 outputs (selectable) Bond pads on top and bottom of chip –Multiple chips can be close-butted side by side Row shift register structure: –Top half of array reads out top-to-bottom –Bottom half of array reads out bottom-to-top –Windowing reduces number of rows read for increased frame rate Column shift register structure: –16 or 64 outputs (selectable) 8 or 32 outputs on each half of array –Each output reads out a block of pixels 16 output mode: –Each block is 128 columns wide x 512 rows ta ll 64 output mode: –Each block is 32 columns wide x 512 rows tall