Surface Instabilities and Generation of Multielectron Bubbles Under Pulsed Electric Fields
نویسندگان
چکیده
We studied the development of surface instabilities leading to the generation of multielectron bubbles (MEBs) in superfluid helium upon the application of a pulsed electric field. We found the statistical distribution of the charge of individual instabilities to be strongly dependent on the duration of the electric field pulse. The rate and probability of generation of these instabilities in relation to the temporal characteristics of the applied field was also investigated.
منابع مشابه
Unexpected Hydrodynamic Behavior of Multielectron Bubbles in Liquid Helium I
We have investig4ated multielectron bubbles (with charges Z,,, 10 6 electrons) in normal liquid He. The drift velocity in an electric field and the charge of the bubbles were measured simultaneously. We found the drag coeJficient to be over an order of magnitude higher than expected from ordinary hydrodynamics. The velocities did not show a correlation with the charge and could vary up to a fac...
متن کاملNovel methods to create multielectron bubbles in superfluid helium.
An equilibrium multielectron bubble (MEB) in liquid helium is a fascinating object with a spherical two-dimensional electron gas on its surface. We discuss two ways in which they have been created. For MEBs that have been observed in the dome of a cylindrical cell with an unexpectedly short lifetime, we show analytically why these MEBs can discharge by tunneling. Using a novel method, MEBs have...
متن کاملCreasing-wrinkling transition in elastomer films under electric fields.
Creasing and wrinkling are different types of instabilities on material surfaces characterized by localized singular folds and continuously smooth undulation, respectively. While it is known that electric fields can induce both types of instabilities in elastomer films bonded on substrates, the relation and transition between the field-induced instabilities have not been analyzed or understood....
متن کاملDielectrophoretic effect of nonuniform electric fields on the protoplast cell
In recent years, dielectrophoresis based microfluidics systems have been used to manipulate colloids, inert particles, and biological microparticles, such as red blood cells, white blood cells, platelets, cancer cells, bacteria, yeast, microorganisms, proteins, DNA, etc. In the current study the governing electric potential equations have been solved in the presence of cell for the purpose of ...
متن کاملMHD Simulations of Relic Radio Bubbles in Clusters
In order to better understand the origin and evolution of relic radio bubbles in clusters of galaxies, we report on an extensive set of 2D MHD simulations of hot buoyant bubbles evolving in a realistic intracluster medium. Our bubbles are inflated near the base of the ICM over a finite time interval from a region whose magnetic field is isolated from the ICM. We confirm both the early conjectur...
متن کامل