The Laser Switch in SQUID Measurements: Fundamental Experiments and Low Frequency Noise Reduction

  • B. Cabrera
Part of the Springer Proceedings in Physics book series (SPPHY, volume 64)

Abstract

We are developing a laser-driven superconducting switch. The switch has been used in several fundamental physics experiments which utilize SQUIDs, and in a noise reduction scheme for low-frequency SQUID measurements. The experiments include characterization studies of the laser switch itself, a direct measurement of the pinning force on a single vortex, the measurement of the Cooper pair mass, a study of the Aharonov-Bohm effect, and a measurement of the kinetic inductance of a superconducting thin-film. The noise reduction scheme is based on modulating the input circuit of a SQUID at a frequency above its 1/f knee. The demodulated output is then devoid of the SQUID noise below the modulation frequency. This paper reviews these experiments and reports on their status.

Keywords

Vortex Quartz Epoxy Coherence Tate 

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Copyright information

© Springer-Verlag Berlin Heidelberg 1992

Authors and Affiliations

  • B. Cabrera
    • 1
  1. 1.Physics DepartmentStanford UniversityStanfordUSA

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