Resonator design for stimulated third sound amplification in He-4 films

摘要

We propose a new resonator to detect the amplification of third sound waves due to stimulated condensation of normal vapor atoms into the superfluid film. We describe the phenomenon and present the conditions required for its achievement. Third sound amplification by stimulated condensation (TASC) is thus an extension of film growth at a fixed DC velocity to a situation involving a continuous AC energy transfer. (C) 2000 Elsevier Science B.V. All rights reserved. [References: 2]