title: Novel methods to create multielectron bubbles in superfluid helium.
abstract: 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 been extracted from a vapor sheath around a hot filament in superfluid helium by applying electric fields up to 15 kV∕cm, and photographed with high-speed video. Charges as high as 1.6×10(-9) C (∼10(10) electrons) have been measured. The latter method provides a means of capture in an electromagnetic trap to allow the study of the extensive exciting properties of these elusive objects.
authors: Lyman Laboratory of Physics, Harvard University, Cambridge, Massachusetts 02138, USA.
authors: J
authors: J
authors: Fang
authors: Anatoly E
authors: AE
authors: Dementyev
authors: J
authors: J
authors: Tempere
authors: Isaac F
authors: IF
authors: Silvera