Abstract
There are significant advantages in operating infrared bolometers at 0.3 K via a 3He system rather than the 1.5 K that can be attained with a pumped 4He cryostat. These are a higher sensitivity, faster response time, and the ability to use larger bolometer elements without compromising the response time. The latter two advantages arise because at the lower temperatures (~0.3K) the lattice specific heat of the bolometer is greatly reduced. In addition, the photon noise of the sensor is reduced, which improves its sensitivity.
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© 1980 Springer Science+Business Media New York
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Sherman, A., Figueroa, O. (1980). A Portable 3He Cryostat for Studies in Astrophysics. In: Timmerhaus, K.D., Snyder, H.A. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 35 A. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9856-1_87
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DOI: https://doi.org/10.1007/978-1-4613-9856-1_87
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