Abstract
Precision measurements near the superfluid (λ) transition of4He is limited by a gravity induced inhomogeneity inT λ. Critical Dynamics in Microgravity (DYNAMX, a NASA preproject) will study the thermal conductivity in the nonlinear region in Microgravity. Unlike the study of static properties, the thermal conductivity can be derived from the measurement of the spatial temperature profile which is essentially alocal measurement of the temperature gradient. We present a method which, in principle, fully removes the apparent impact of gravity from the measurement. The inevitably finite spatial resolution of the probe and temperature resolution of the thermometer, however, make microgravity essential to study the region of interest.
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References
G. Ahlers,J. Low Temp. Phys. 84, 173 (1991).
J.A. Lipa, D.R. Swanson, J.A. Nissen, T.C.P. Chui, and U.E. Israelsson,Phys. Rev. Lett. 76, 944 (1996).
W.Y. Tam and G. Ahlers, Phys. Rev. B32, 5932 (1985);33, 183 (1986).
F.-C. Liu and G. Ahlers, Phys. Rev. Lett.76, 1300 (1996); Physica B194–196, 597 (1994).
M. Dingus, F. Zhong, and H. Meyer, J. Low Temp. Phys.65, 185 (1986).
R.V. Duncan, G. Ahlers, and V. Steinberg, Phys. Rev. Lett.60, 1522 (1988).
R. Duncan, R. Akau, S. Gianoulakis, U. Israelsson and T. ChuiPhysica B,194–196, 603 (1994).
R. Haussmann and V. Dohm Z. Phys. B87, 229 (1992); Phys. Rev. Lett.67, 3404 (1991).
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Liu, FC., Duncan, R., Israclsson, U. et al. Effect of gravity on the thermal conductivity measurement of4He nearT λ . Czech J Phys 46 (Suppl 1), 87–88 (1996). https://doi.org/10.1007/BF02569459
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DOI: https://doi.org/10.1007/BF02569459