2011/10/31 by K. A. Twedt, Kevin A. Twedt, S. L. Rolston · 34 citations
Physics and Astronomy · #Atomic and Molecular Physics #Atomic physics #Cold Atom Physics and Bose-Einstein Condensates #Coupling (piping) #Dust and Plasma Wave Phenomena #Electric field #Electron #Kinetic energy #Materials science #Nuclear physics #Physics #Plasma #Quantum mechanics #physics.plasm-ph
paper · pdf · doi:10.1103/physrevlett.108.065003
published in Physical Review Letters 108(6), 065003 (American Physical Society)
arxiv created 2012/02/08 · openalex publication_date 2012/02/08 · arxiv updated 2012/02/10 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Using a new technique to directly detect current induced on a nearby electrode, we measure plasma oscillations in ultracold plasmas, which are influenced by the inhomogeneous and time-varying density and changing neutrality. Electronic detection avoids heating and evaporation dynamics associated with previous measurements and allows us to test the importance of the plasma neutrality. We apply dc and pulsed electric fields to control the electron loss rate and find that the charge imbalance of the plasma has a significant effect on the resonant frequency, in excellent agreement with recent predictions suggesting coupling to an edge mode.