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Low Noise UHF Thin Film SQUID with Cryogenic HEMT Preamplifier

  • A. Cavalleri
  • M. Cerdonio
  • G. Fontana
  • G. Jung
  • R. Macchietto
  • R. Mezzena
  • S. Vitale
  • J. P. Zendri
Part of the Springer Proceedings in Physics book series (SPPHY, volume 64)

Abstract

The design and performance of UHF thin film RF SQUID system employing a cryogenic RF preamplifier is described. The flux noise of the magnetometer is \(7 \times {10^{ - 6}}{\Phi _0}/\sqrt {Hz} \) at \(4.8 \times {10^{ - 6}}{\Phi _0}/\sqrt {Hz} \) at 1.4 K. The temperature dependance of the fractional step rise α was measured showing a good agreement with the Kurkijärvi-Webb theory.

Keywords

Intrinsic Noise Fractional Step Tank Circuit Loop Configuration Varactor Diode 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

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    J.Kurkijarvi and W.Webb, in Proc.ASC.72,IEEE New York 1973 p.581Google Scholar
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    A.Cavalieri, M.Cerdonio, G.Fontana, G.Jung, R.Mezzenaand S.Vitale, in Proc. of LTEC’90, Inst, of Cryogenics, Southampton 1990 p. 09. 3Google Scholar
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    Cryogenic Cons. Lim., model SQS6Google Scholar
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    L.D. Jackel and R.A. Buhrman, J. Low Temp. Phys., 19, 201 (1974)Google Scholar
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    K. Duh, M.W. Pospieszalski, W.F. Kopp, P.HO A.A. Jabra, P.C. Chao, P.M. Smith, L.F.Lester, J.M.Ballingal and S.Weinreb, IEEE Trans.on El. Dev., 35, 249 (1988)Google Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • A. Cavalleri
    • 1
  • M. Cerdonio
    • 1
    • 2
  • G. Fontana
    • 1
  • G. Jung
    • 1
    • 3
  • R. Macchietto
    • 1
  • R. Mezzena
    • 1
  • S. Vitale
    • 1
  • J. P. Zendri
    • 1
  1. 1.Dipartimento di FisicaUniversità degli Studi di TrentoPovo TrentoItaly
  2. 2.Centro di Fisica degli Stati Aggregati e Impianto Ionico del CNRPovo, TrentoItaly
  3. 3.Instytut Fizyki PANWarszawaPoland

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