The effects of self-magnetic fields in relaxation oscillation SQUIDs

Book · Sat Dec 31 04:00:00 EST 1994

OSTI ID:64692

Kawai, Jun; Uehara, Gen ^[1]; Kado, Hisashi ^[2]

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1. Superconducting Sensor Lab., Chiba (Japan)
2. Electrotechnical Lab., Ibaraki (Japan)

In a Relaxation Oscillation SQUID (ROS), the magnetic fields (Self-Magnetic Fields, i.e. SMF) are generated by the current in the shunt circuit couple to the SQUID loop. It was proved that SMF caused asymmetry and a shift of the magnetic flux-frequency ({Phi}-f) characteristics and the frequency fluctuation. The calculated results of the {Phi}-f curve taking account of the SNT are in good agreement with the experiment results. The asymmetric {Phi}-f curve provides a larger df/d{Phi}, which leads to the good flux resolution. While the frequency fluctuation, which is observed as the broad spectrum, increases in proportion to the transfer coefficient (df/d{Phi}). The SMF depends on the mutual inductance between the shunt inductance and the SQUID loop.

• OSTI ID: 64692
• Report Number(s): CONF-940142--; ISBN 0-8194-1455-7
• Country of Publication: United States
• Language: English

Related Subjects

44 INSTRUMENTATION
INCLUDING NUCLEAR AND PARTICLE DETECTORS
66 PHYSICS
CRITICAL CURRENT
DESIGN
ELECTRICAL PROPERTIES
EXPERIMENTAL DATA
FABRICATION
FREQUENCY DEPENDENCE
MAGNETIC FIELDS
MAGNETIC FLUX
SQUID DEVICES
THEORETICAL DATA