Oscillations of Charged Helium II Drops
- 52 Downloads
We report on an experimental study of the shape oscillations of charged helium drops levitated with a magnetic field. Shape oscillations are excited with an AC electric field. Many different modes of oscillation of the drop are observable. The resonant frequencies of the drops are found to be a function of amplitude. Quantitative measurements of the damping of shape oscillations are made by using a laser beam focused through the drop. The observed damping of shape oscillations is found to be greater than the damping due to the viscosities of the liquid and the surrounding vapor. Other mechanisms possibly responsible for this damping are discussed. We also report experiments on drops with angular momentum.
KeywordsViscosity Magnetic Field Experimental Study Helium Laser Beam
Unable to display preview. Download preview PDF.
- 1.M. A. Weilert, D. L. Whitaker, H. J. Maris, and G. M. Seidel, Phys. Rev. Lett. 77, 4840 (1996).Google Scholar
- 2.The magnet was purchased from Oxford Instruments, Old Station Way, Eynsham, Witney, Oxon, England.Google Scholar
- 3.M. A. Weilert, D. L. Whitaker, H. J. Maris, and G. M. Seidel, J. Low Temp. Phys., 106, 101 (1997).Google Scholar
- 4.W. Schoepe and G. W. Rayfield, Phys. Rev. A, 7, 2111 (1973).Google Scholar
- 5.H. Lamb Hydrodynamics, 6th Ed., Cambridge University Press, Cambridge, (1932) (reprinted by Dover, New York, 1945).Google Scholar
- 6.Rayleigh, Proc. R. Soc. London, 29, 71 (1879)Google Scholar
- 7.A. Prosperetti, J. de Mech.. 19, 149 (1980).Google Scholar