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Author Niemela, J. J. ♦ Smith, M. R. ♦ Donnelly, R.J.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY ♦ HELIUM I ♦ CONVECTIVE INSTABILITIES ♦ AMPLITUDES ♦ FREQUENCY DEPENDENCE ♦ FREQUENCY MODULATION ♦ LAYERS ♦ NUSSELT NUMBER ♦ ROTATION ♦ VISCOSITY ♦ EVEN-EVEN NUCLEI ♦ HELIUM 4 ♦ HELIUM ISOTOPES ♦ INSTABILITY ♦ ISOTOPES ♦ LIGHT NUCLEI ♦ MODULATION ♦ MOTION ♦ NUCLEI ♦ PLASMA INSTABILITY ♦ STABLE ISOTOPES ♦ Superfluidity- (1992-)
Abstract We study experimentally the convective instability in a layer of helium I subject to a time-dependent rotation about a vertical axis {Omega}({ital t})={Omega}{sub {ital s}}+{Omega}{sub 0}cos({tilde {omega}}{ital t}). Relative stability of the conducting state is primarily determined by {tilde {omega}}, with the magnitude of shifts in the convective threshold at fixed {tilde {omega}} increasing with the modulation amplitude {Omega}{sub 0}/{Omega}{sub {ital s}}. Our observations are compared with recent theoretical work.
ISSN 10502947
Educational Use Research
Learning Resource Type Article
Publisher Date 1991-12-15
Publisher Place United States
Journal Physical Review A. General Physics
Volume Number 44
Issue Number 12


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