Specific heat of liquid helium in zero gravity very near the lambda point

@article{Lipa2003SpecificHO,
  title={Specific heat of liquid helium in zero gravity very near the lambda point},
  author={John A. Lipa and Joel Alan Nissen and D. A. Stricker and D. R. Swanson and Talso C. P. Chui},
  journal={Physical Review B},
  year={2003},
  volume={68},
  pages={174518}
}
We report the details and revised analysis of an experiment to measure the specific heat of helium with subnanokelvin temperature resolution near the lambda point. The measurements were made at the vapor pressure spanningthe region from 22 mK below the superfluid transition to 4 μK above. The experiment was performed in Earth orbit to reduce the rounding of the transition caused by gravitationally induced pressure gradients on Earth. Specific-heat measurements were made deep in the asymptotic… 
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References

SHOWING 1-10 OF 60 REFERENCES
Specific heat of helium confined to a 57- &mgr;m planar geometry near the lambda point
We report measurements of the specific heat of liquid helium confined to 57-&mgr;m planar gaps extending to within a few nanokelvin of the bulk lambda transition. The data are in fair agreement with
Very high-resolution heat-capacity measurements near the lambda point of helium
New measurements of the heat capacity of a sample of helium 3-mm high are reported, which extend to within 5 x 10 to the -8th deg of the lambda transition at the vapor pressure. From an analysis of
Heat capacity and thermal relaxation of bulk helium very near the lambda point.
TLDR
The objective of the mission was to measure the heat capacity and thermal conductivity of helium veryclose to the lambda point with the smearing effect of gravity removed and preliminary results from the experiment are reported.
Universality of static properties near the superfluid transition in /sup 4/He
We present the results of new analyses of static properties near the superfluid transition in /sup 4/He which incorporate recent accurate entropy measurements. They yield a superfluid density
Specific heat near the lambda point in 4He and 3He-4He mixtures: Test of universality of the critical exponent and the amplitude ratio, and observation of the critical-tricritical crossover effect
The specific heat under saturated vapor pressure of pure 4He and of six 3He-4He mixtures up to X = 0.545 was measured in the temperature range 3 × 10−6 <¦T-Tλ¦ <10−2 K. The critical exponents αΦ and
Thermal conductivity and boundary resistance near the λ-point of helium
We report additional measurements and analysis of the temperature dependence of the thermal conductivity of helium in the region just above the lambda point. The data were obtained using a cell with
Second sound very near Tλ
The results of an experimental investigation of the evolution of planar, non-linear, second-sound pulses in superfluid4He, to within 650 nK of the λ-transition, are presented. A new method for
...
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