Crossover analyses of heat capacity and susceptibility measurements near the super(3)He liquid-gas critical point

An experiment called MISTE (Microgravity Scaling Theory Experiment) is being developed for a future mission on the International Space Station. The main objective of this flight experiment is to perform in-situ PVT, heat capacity at constant volume, C sub(V), and isothermal susceptibility, Chi sub(T...

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Bibliographic Details
Published in:Journal of low temperature physics 2000-12, Vol.121 (5-6), p.633-642
Main Authors: Barmatz, M, Hahn, Inseob, Zhong, Fang, Anisimov, M A, Agayan, V A
Format: Article
Language:English
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Summary:An experiment called MISTE (Microgravity Scaling Theory Experiment) is being developed for a future mission on the International Space Station. The main objective of this flight experiment is to perform in-situ PVT, heat capacity at constant volume, C sub(V), and isothermal susceptibility, Chi sub(T), measurements in the asymptotic region of the super(3)He liquid-gas critical point. On the ground, gravity induces a density gradient that does not permit an accurate test of theoretical predictions within the asymptotic region. In preparation for this flight experiment, precision ground-based measurements are now being performed in the crossover region away from the critical point to determine the crossover parameters. Recent C sub(V) and Chi sub(T) measurements along the critical isochore have been analyzed using a new crossover parametric equation-of-state and a field theoretical Renormalization Group calculation based upon the phi super(4) model. A description of the experimental techniques and preliminary results of the theoretical analyses will be presented.
ISSN:0022-2291