ACOUSTO-OPTIC SPECTROMETER FOR RADIO ASTRONOMY.

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作者
Chin, Gordon
Buhl, David
Florez, Jose M.
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Acoustooptical devices - Radio astronomy;
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A description is given of existing AOS (acousto-optic spectrometer) backends in Australia and Japan. The GSFC AOS uses a discrete bulk acoustic wave Itek Bragg Cell, 5 mW Helium-Neon laser, and a 1024 element Reticon CCPD array. The analog signals from the photodiode array are digitized, added and stored in a very high-speed custom built multiplexer board which allows one to perform synchronous detection of weak signals. The experiment is controlled and the data is displayed and stored with an LSI-11 microcomputer system with dual floppy disks. Also described is an integrated SAW Bragg cell which will miniaturize a complete AOS system into a 1 multiplied by 3 inch package.
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页码:30 / 37
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