Title :
Characterization of NbN HEB mixers cooled by a close-cycled 4 Kelvin refrigerator
Author :
Jiang, L. ; Li, J. ; Zhang, W. ; Yao, Q.J. ; Lin, Z.L. ; Shi, S.C. ; Vachtomin, Y.B. ; Antipov, S.V. ; Svechnikov, S.I. ; Voronov, B.M. ; Goltsman, G.N.
Author_Institution :
Purple Mountain Obs., Nanjing, China
fDate :
6/1/2005 12:00:00 AM
Abstract :
It is quite beneficial to operate superconducting hot-electron-bolometer (HEB) mixers with a close-cycled 4 Kelvin refrigerator for real applications such as astronomy and atmospheric research. In this paper, a phononcooled NbN HEB mixer (quasioptical type) is thoroughly characterized under such a cooling circumstance. The effects of mechanical vibration, electrical interference, and temperature fluctuation of a two-stage Gifford-McMahon 4 Kelvin refrigerator upon the characteristics of the phononcooled NbN HEB mixer are investigated in particular. Detailed measurement results are presented.
Keywords :
bolometers; cryogenic electronics; niobium compounds; submillimetre wave mixers; superconducting microwave devices; superconducting mixers; 4 K; HEB mixers; NbN; close-cycled 4 Kelvin refrigerator; electrical interference; mechanical vibration effects; phonon-cooled HEB mixer; quasioptical type HEB mixer; superconducting hot-electron-bolometer mixers; temperature fluctuation; two-stage Gifford-McMahon 4 Kelvin refrigerator; Bridges; Cooling; Extraterrestrial measurements; Fluctuations; Kelvin; Refrigeration; Superconducting devices; Superconducting films; Temperature; Vibration measurement; Close-cycled 4 Kelvin refrigerator; NbN HEB mixers; mechanical vibration; temperature fluctuation;
Journal_Title :
Applied Superconductivity, IEEE Transactions on
DOI :
10.1109/TASC.2005.849891
