Characterization of the Input Noise Sources of a dc SQUID

Journal of Low Temperature Physics

Volumn 123, Issue 5-6, 2001, Pages 275-302

  Falferi, P ^a   Bonaldi, M ^a   Cerdonio, M ^a   Muck M ^b   Vinante, A ^c   Mezzena, R ^c   Prodi, G A ^c   Vitale, S ^c  

^a SEZIONE DI PADOVA   (Italy)

^b JUSTUS LIEBIG UNIVERSITY   (Germany)

^c UNIVERSITY OF TRENTO   (Italy)

Author keywords

[No Author keywords available]

Indexed keywords

EID: 0001514168     PISSN: 00222291     EISSN: None     Source Type: Journal    
DOI: 10.1023/A:1017503631079     Document Type: Article

References (27)

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15. S≅0.005; these values imply that the effect of the stray mutual inductance on the noise sources is negligible.
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19. i plus real and imaginary terms which depend on both the complex transfer function JΦ and the open loop gain which is also a complex function of frequency. Besides these effects, one has to consider also the stray capacitance between the input coil and the SQUID loop, whose effect on the real part of the input impedance is to add a term, proportional to VΦ, which increases with the square of the frequency.
20. For sake of clarity, it is convenient to stress that, for the definition of the reduced dimensionless spectral densities given by Hilbert and Clarke, the values that they report in Ref. 15 are a factor two smaller than the value given here.
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23. M. Simmonds, Quantum Design, private communication.
24. Model 500 micropreamp and model 550 SQUID controller from Quantum Design, 11578 Sorrento Valley Road, Suite 30, San Diego, CA 92121-1311, USA.
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