caa a22 4500 445366834 CHVBK 20180317142933.0 cr unu---uuuuu 170323e20110401xx s 000 0 eng 10.1007/s10909-010-0273-5 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0273-5 Search for Enhancement of the Isobaric Thermal Expansion Coefficient of Superfluid 4He near T λ byaHeat Current [Elektronische Daten] [Yuanming Liu, Melora Larson, Ulf Israelsson] We report an experimental search for the enhancement of the isobaric thermal expansion coefficient (β P) of superfluid 4He near the superfluid transition by a heat current (Q). The experiment was carried out using the hot volume technique at constant sample pressure of 1 bar. Liquid helium was contained in a thermal conductivity cell, and a constant heat current, Q=10 or 100 μW/cm2, was supplied from below through the sample column. We performed a sample density calculation based on existing helium properties known in the literature and a proposed enhancement Δβ P(Q). Both calculations, with or without the β P enhancement, agree qualitatively with the measurement. The lack of definitive differentiation indicates that the β P enhancement cannot be definitively resolved by our measurement in spite of applications of high-resolution thermometry and pressure regulation. Springer Science+Business Media, LLC, 2010 Thermal expansion coefficient nationallicence Superfluid helium nationallicence Heat current nationallicence Liu Yuanming Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, 91109, Pasadena, CA, USA aut Larson Melora Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, 91109, Pasadena, CA, USA aut Israelsson Ulf Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, 91109, Pasadena, CA, USA aut Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 163/1-2(2011-04-01), 13-25 0022-2291 163:1-2<13 2011 163 10909 https://doi.org/10.1007/s10909-010-0273-5 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0273-5 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Liu Yuanming Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, 91109, Pasadena, CA, USA aut NATIONALLICENCE 700 1- Larson Melora Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, 91109, Pasadena, CA, USA aut NATIONALLICENCE 700 1- Israelsson Ulf Jet Propulsion Laboratory, California Institute of Technology, 4800 Oak Grove Drive, 91109, Pasadena, CA, USA aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 163/1-2(2011-04-01), 13-25 0022-2291 163:1-2<13 2011 163 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer