A. Mukhin, A. E. Abashin, O. Bolshakov, I. Lesnov, A. A. Shishov
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Experimental estimation of optical NEP of 350GHz CEB bolometer
We have constructed an experimental setup for estimation of optical response of 350 GHz Cold-electron bolometer(CEB) integrated in cross-slot antenna for planned high altitude balloon-born telescope BOOMERANG. The experimental setup based on dilution cryostat Triton 200 with 10mK base temperature. Our sensor consist of CEB sensor integrated in cross-slot antenna with 350GHz central frequency. Actual spectral band was reduced by quasioptical filters placed in front of detector. We constructed high sensitive low noise readout circuit based on room-temperature JFET operational amplifiers with optimal noise match with detector resistance in optimal working point. We constructed advanced geometry black body radiator with tuned temperature for optical measurements with needed background power load.
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