Fang, JiepingDementyev, Anatoly E.Tempere, JacquesSilvera, Isaac2012-05-072011Fang, Jieping, Anatoly E. Dementyev, Jacques Tempere, and Isaac F. Silvera. 2011. Novel methods to create multielectron bubbles in superfluid helium. Review of Scientific Instruments 82(3): 033904.0034-67481089-7623http://nrs.harvard.edu/urn-3:HUL.InstRepos:8682985An 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.en-USbubblesexcited statesflow visualizationsuperfluid helium-3superfluid helium-4two-dimensional electron gastunnellingsuperfluid phasesuperfluid phase of 3Hestrongly correlated electronsother condensed matterJournal Article2012-05-0710.1063/1.3553030