| Autor: |
Vystavkin, A. N., Shuvaev, D. V., Kuz’min, L. S., Tarasov, M. A., Aderstedt, E., Willander, M., Claeson, T. |
| Předmět: |
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| Zdroj: |
Journal of Experimental & Theoretical Physics; Mar99, Vol. 88 Issue 3, p598, 5p |
| Abstrakt: |
This paper describes the design and experimental testing of a high-sensitivity hot-electron bolometer based a film of normal metal, exploiting the Andreev reflection from superconductor boundaries, and cooled with the help of a superconductor-insulator-normal metal junction. At the measured thermal conductivity, G ≈ 6 × 10[sup -12] W/K, and a time constant of τ = 0.2 µs, and a temperature of 300 mK, the estimated noise-equivalent power NEP = 5 × 10[sup -18] W/Hz[sup ½], assuming that temperature fluctuations are the major source of noise. At a temperature of 100 mK, the thermal conductivity drops to G ≈ 7 × 10[sup -14] W/K, which yields NEP = 2 × 10[sup -19] W/Hz[sup ½] at a time constant of τ = 5 µs. The microbolometer has been designed to serve as a detector of millimeter and FIR waves in space-based radio telescopes. [ABSTRACT FROM AUTHOR] |
| Databáze: |
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