ISSN:
1432-0630
Keywords:
74
;
06
;
85.70
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
Abstract It is shown theoretically that a switch process in the hysteretic SQUID leads to a phase shift between the tank circuit voltage and the driving generator current. Considering only a pure switch model the influence of the parametric SQUID inductance will not be taken into account. In the hysteretic mode of the SQUID the tank circuit is not only damped, but also detuned. On the time average the rf SQUID appears as a reactance. Its amplitude and phase depend on the magnetic field applied to the SQUID. In order to simulate the possibility of phase-sensitive detection the spiral description developed by the authors will be brought up. The practical case of a 30-MHz SQUID was simulated on a digital computer wheraby the frequency was varied from the resonance to the − 3 dB bandlimits of the tank circuit. An experiment which detects simultaneously the amplitude of the tank circuit voltage as well as its phase as a function of the magnetic field in the SQUID is described.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00931422
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