Velocity of Sound in Liquid Helium at its Lambda Point

1965 ◽  
Vol 15 (9) ◽  
pp. 386-389 ◽  
Author(s):  
Isadore Rudnick ◽  
Kenneth A. Shapiro
Keyword(s):  
Liquid Helium ◽  
Velocity Of Sound ◽  
Lambda Point

The velocity of sound in liquid helium near the lambda point

1988 ◽  
Vol 21 (4) ◽  
pp. L75-L81 ◽  
Author(s):  
J Maza ◽  
F Miguelez ◽  
A Veira ◽  
F Vidal
Keyword(s):  
Liquid Helium ◽  
Velocity Of Sound ◽  
Lambda Point

Measurements on the velocity of sound in helium gas at liquid helium temperatures

Physica ◽  
1958 ◽  
Vol 24 (1-5) ◽  
pp. 59-67 ◽  
Author(s):  
A. van Itterbeek ◽  
W. de Laet
Keyword(s):  
Liquid Helium ◽  
Velocity Of Sound ◽  
Helium Gas

Apparatus to measure the velocity of sound down to liquid helium temperatures with the optical method

Physica ◽  
1954 ◽  
Vol 20 (1-6) ◽  
pp. 307-310 ◽  
Author(s):  
A. Van Itterbeek ◽  
G.J. Van Den Berg ◽  
W. Limburg
Keyword(s):  
Liquid Helium ◽  
Optical Method ◽  
Velocity Of Sound

Experiments with a rotating cylinder viscometer in liquid helium II

1953 ◽  
Vol 49 (4) ◽  
pp. 717-727 ◽  
Author(s):  
A. C. Hollis-Hallett
Keyword(s):  
Liquid Helium ◽  
Normal Component ◽  
Rotating Cylinder ◽  
Mutual Friction ◽  
Rotating Fluid ◽  
Helium Ii ◽  
Lambda Point ◽  
New Type ◽  
Coefficient Of Viscosity ◽  
Cylinder Viscometer

ABSTRACTLiquid helium II was contained in the annular space between two co-axial cylinders, the inner of which was suspended by a torsion fibre while the outer was rotated at constant speeds. The torque upon the inner cylinder produced by the rotating fluid was measured for various steady velocities between 0·1 and 3 cm.sec.1, and was not found to be directly proportional to the velocity of rotation at any temperature between the lambda-point and 1·15° K. This result suggests that there must be some new type of non-linear frictional force acting in the liquid, possibly in addition to the Gorter-Mellink force of mutual friction.Extrapolation of the experimental results to zero velocity gives values of the coefficient of viscosity of the normal component which agree with the oscillating disk values between the lambda-point and about 1·6° K. At lower temperatures, the present results are significantly lower, suggesting, perhaps, that the values of the normal component density used in the analysis of the oscillating disk results were too low.

The Velocity of Sound in Liquid Helium

1938 ◽  
Vol 54 (7) ◽  
pp. 506-509 ◽  
Author(s):  
J. C. Findlay ◽  
A. Pitt ◽  
H. Grayson Smith ◽  
J. O. Wilhelm
Keyword(s):  
Liquid Helium ◽  
Velocity Of Sound

Increase of the critical current at the liquid-helium lambda point in superconducting perforated multilayers

2002 ◽  
Vol 60 (2) ◽  
pp. 295-301 ◽  
Author(s):  
S. L Prischepa ◽  
L. V Mercaldo ◽  
C Attanasio ◽  
M Salvato ◽  
L Maritato ◽  
...  
Keyword(s):  
Liquid Helium ◽  
Critical Current ◽  
Lambda Point

Possible breakdown of dynamic scaling at the liquid helium lambda point

1978 ◽  
Vol 67 (5-6) ◽  
pp. 387-390 ◽  
Author(s):  
Volker Dohm ◽  
Richard A. Ferrell
Keyword(s):  
Liquid Helium ◽  
Dynamic Scaling ◽  
Lambda Point
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