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- W1998981839 abstract "Abstract We are developing bolometer arrays for continuum detection in millimeter and submillimeter astronomy [1]. For the 2 mm atmospheric window, where the transmission is comparatively high, a bolometer temperature of about 100 mK is necessary in order to avoid being limited by the system noise. Our new 2 mm array is cooled by a 3 He / 4 He -dilution refrigerator with a base temperature of 30 mK. The substrate for the 19 channel bolometer array consists of a single-crystal silicon wafer with silicon-nitride membranes. Radiation is collected by a single-mode horn array in front of the wafer and coupled into efficient absorbers in the center of the membranes. Resulting temperature changes of the absorbers are measured with NTD-germanium thermistors. In the first stage of the read out electronics, we use JFETs working at 150 K. Cold RF-filters prevent RF interference from entering the bolometer array cavity. The combination of several mesh filters and a short piece of cylindrical waveguide at the end of each horn defines the bandpass for the incoming radiation, which is matched to the 2 mm atmospheric window." @default.
- W1998981839 created "2016-06-24" @default.
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- W1998981839 date "2000-04-01" @default.
- W1998981839 modified "2023-09-27" @default.
- W1998981839 title "The MPIR 100mK bolometer array for 2mm continuum observations" @default.
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- W1998981839 doi "https://doi.org/10.1016/s0168-9002(99)01415-1" @default.
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