The design and construction of 300-mK composite bolometers developed for millimeter-wave astronomical observations are described. Graphite fibers are used as the electrical leads for the thermistor to reduce the thermal conductance and heat capacity associated with the leads. A mechanical suspension made of Nylon fibers odes the required thermal conductance. Electrical noise equivalent powers below 1 × 10-16 W/ √Hz have been achieved for detectors with thermal time constants of 11 ms. The detectors were installed in a millimeter-wave photometer and used to perform observations of the cosmic microwave background from a balloonborne platform. The flight performance was consistent with the measured laboratory properties.
© 1992 Optical Society of America
D. C. Alsop, C. Inman, A. E. Lange, and T. Wilbanks, "Design and construction of high-sensitivity, infrared bolometers for operation at 300 mK," Appl. Opt. 31, 6610-6615 (1992)