Conceptual design of a hybrid Ge:Ga

Details Conceptual design of a hybrid Ge:Ga Conceptual design of a hybrid Ge:Ga

Jul 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984stin...8434708p&link_type=abstract

Conceptual design of a hybrid Ge:Ga detector array

Astronomy and Astrophysics

Astronomy

Aerospace Environments, Design Analysis, Feasibility Analysis, Infrared Astronomy, Spaceborne Telescopes, Large Deployable Reflector, Metal Oxide Semiconductors, Multiplexing, Space Infrared Telescope Facility, Stress Analysis, Switches, Systems Integration

Scientific paper

For potential applications in space infrared astronomy missions such as the Space Infrared Telescope Facility and the Large Deployable Reflector, integrated arrays of long-wavelength detectors are desired. The results of a feasibility study which developed a design for applying integrated array techniques to a long-wavelength (gallium-doped germanium) material to achieve spectral coverage between 30 and 200 microns are presented. An approach which builds up a two-dimensional array by stacking linear detector modules is presented. The spectral response of the Ge:Ga detectors is extended to 200 microns by application of uniaxial stress to the stack of modules. The detectors are assembled with 1 mm spacing between the elements. Multiplexed readout of each module is accomplished with integration sampling of a metal-oxide-semiconductor (MOS) switch chip. Aspects of the overall design, including the anticipated level of particle effects on the array in the space environment, a transparent electrode design for 200 microns response, estimates of optical crosstalk, and mechanical stress design calculations are included.

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