Staircase pattern in a superfluid He-II torsional-oscillator analog of the radio-frequency SQUID
Journal Article
·
· Physical Review, B: Condensed Matter; (United States)
- Centro di Fisica degli Stati Aggregati del Consiglio Nazionale delle Ricerche-Istituto Trentino di Cultura, I-38050 Povo, Trento (Italy)
- Dipartimento di Fisica, Universita degli Studi di Trento, I-38050 Povo, Trento (Italy) Istituto Nazionale di Fisica Nucleare, Gruppo Collegato di Trento, Sezione di Padova, I-38050, Povo, Trento (Italy)
We are developing a superfluid [sup 4]He analog of the rf SQUID. A thin partition with a micrometric orifice is placed inside a toroidal container filled with liquid helium; ac and dc superflows through the orifice are induced by rotating the whole torus, which is the inertial member of a torsional oscillator. The torus oscillation amplitude vs drive curve shows a small but reproducible staircase pattern, which is detectable between 1.4 and 2.05 K, but is not modulated by a superimposed steady rotation. We discuss this behavior in terms of the occurrence of multiple phase slips.
- OSTI ID:
- 5425569
- Journal Information:
- Physical Review, B: Condensed Matter; (United States), Vol. 49:2; ISSN 0163-1829
- Country of Publication:
- United States
- Language:
- English
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Studies of the flow properties of superfluid /sup 3/He and of the superfluid density of /sup 4/He films in restricted geometries
Journal Article
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Sat Dec 01 00:00:00 EST 1990
· Physical Review, B: Condensed Matter; (USA)
·
OSTI ID:5425569
Texture and hydrodynamics of a thin slab of superfluid /sup 3/He-A in a torsional oscillator. I. Theory
Journal Article
·
Sun Jan 01 00:00:00 EST 1989
· J. Low Temp. Phys.; (United States)
·
OSTI ID:5425569
Studies of the flow properties of superfluid /sup 3/He and of the superfluid density of /sup 4/He films in restricted geometries
Thesis/Dissertation
·
Sun Jan 01 00:00:00 EST 1984
·
OSTI ID:5425569
Related Subjects
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 4
SUPERFLUIDITY
ORIFICES
OSCILLATORS
SQUID DEVICES
TEMPERATURE RANGE 0000-0013 K
TORSION
ELECTRONIC EQUIPMENT
EQUIPMENT
EVEN-EVEN NUCLEI
FLUXMETERS
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NUCLEI
OPENINGS
STABLE ISOTOPES
SUPERCONDUCTING DEVICES
TEMPERATURE RANGE
665420* - Superfluidity- (1992-)
SUPERCONDUCTIVITY AND SUPERFLUIDITY
HELIUM 4
SUPERFLUIDITY
ORIFICES
OSCILLATORS
SQUID DEVICES
TEMPERATURE RANGE 0000-0013 K
TORSION
ELECTRONIC EQUIPMENT
EQUIPMENT
EVEN-EVEN NUCLEI
FLUXMETERS
HELIUM ISOTOPES
ISOTOPES
LIGHT NUCLEI
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
NUCLEI
OPENINGS
STABLE ISOTOPES
SUPERCONDUCTING DEVICES
TEMPERATURE RANGE
665420* - Superfluidity- (1992-)