Production and Detection of Solitary Macroscopic Quantized Vortices in Helium II
- 5 September 1967
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 161 (1), 202-206
- https://doi.org/10.1103/physrev.161.202
Abstract
Ultrasonic cavitation was induced in liquid helium using plane and cylindrical standing-wave systems resonant at 89 and 53 kc/sec, respectively. The threshold voltage for cavitation noise was measured at different rotation rates of a shaft, with and without an attached paddle, rotating in the vicinity of the sound field. Below the point the threshold was found to be lowered sharply at a critical rotation rate . The experiments were repeated with five different shaft sizes, and was found to be inversely proportional to , where is the radius of the shaft. The constant of proportionality was found to be , where is the mass of one helium atom. Further, smaller threshold reductions were observed at rotation rates of , with the largest shaft sizes. These results are consistent with the theory of quantized vortex formation and appear to indicate that such vortices play a role in the cavitation nucleation process.
Keywords
This publication has 4 references indexed in Scilit:
- Studies of the Threshold-of-Cavitation Noise in Liquid HeliumThe Journal of the Acoustical Society of America, 1966
- Visible Cavitation in Liquid HeliumThe Journal of the Acoustical Society of America, 1966
- Cavitation in Liquid HeliumPhysical Review B, 1964
- The Formation of BubblesJournal of Applied Physics, 1944