Seven matched bolometers for millimeter wave observations

Details Seven matched bolometers for millimeter wave observations Seven matched bolometers for millimeter wave observations

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993ijimw..14..749k&link_type=abstract

International Journal of Infrared and Millimeter Waves (ISSN 0195-9271), vol. 14, no. 4, p. 749-762.

Computer Science

Performance

16

Bolometers, Cryogenic Temperature, Electromagnetic Noise, Infrared Detectors, Millimeter Waves, Thermal Conductivity, Earth Sciences, Performance Tests, Plasma Diagnostics, Telescopes

Scientific paper

We have fabricated a millimeter wave observation system using an array of bolometric detectors. The performance of the system depends largely on obtaining identical performance from each bolometer. We achieved a variance in the responsivity of less than 4 percent except for one of the seven elements. The bolometers had an electrical NEP of 1.3 x l0 exp -16 W/sq rt Hz under radiation background loading of 30 pW. We used an ac bridge readout circuit to significantly improve the stability of the array and showed that observations can be done without a mechanical beam switch. The bolometer array is now in use on the Nobeyama 45-m telescope for 150-GHz observations.

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