The angular distribution of phonons radiated from a heated solid surface into liquid4He. I. Measurement principles and techniques
- 6 February 1975
- journal article
- Published by IOP Publishing in Journal of Physics C: Solid State Physics
- Vol. 8 (3) , 289-299
- https://doi.org/10.1088/0022-3719/8/3/008
Abstract
A detailed description of a newly developed experimental technique for measuring the angular distribution of phonons radiated from the surface of a solid, heated to a few K, into liquid helium 4 at T<or approximately=0.1K is given. The relevance of such measurements to the Kapitza boundary conductance problem is discussed and examples of measured angular distributions from cleaved (100) faces of sodium fluoride crystals and from gold films evaporated on glass substrates are presented to illustrate the possibilities of the technique.Keywords
This publication has 15 references indexed in Scilit:
- Phonon reflection at a cleaved sodium fluoride-helium film interfaceJournal of Low Temperature Physics, 1974
- Kapitza resistance and acoustic transmission across boundaries at high frequenciesJournal of Physics C: Solid State Physics, 1974
- Reflection of Phonons at an Interface between a Solid and Liquid HeliumPhysical Review Letters, 1972
- Attenuation and Velocity of Sound in Superfluid HeliumPhysical Review Letters, 1972
- Excitations Radiated from a Thermal Source in Helium II below 0.3KPhysical Review A, 1971
- Optimum Geometry of Saddle Shaped Coils for Generating a Uniform Magnetic FieldReview of Scientific Instruments, 1970
- Solderless Thermal Connector for Use at Low TemperaturesReview of Scientific Instruments, 1967
- The acoustic impedance of liquid helium-3Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1965
- Thermal Boundary Resistance between Solids and Helium below 1°KPhysical Review B, 1964
- THE TRANSPORT OF HEAT BETWEEN DISSIMILAR SOLIDS AT LOW TEMPERATURESCanadian Journal of Physics, 1959