Experimental Observation of a Periodically Oscillating Plasma Sphere in a Gridded Inertial Electrostatic Confinement Device

descriptionPublicationkeyboard_double_arrow_right Article 29 Jun 2005 English Publisher:American Physical Society (APS)Journal:Physical Review Letters, volume 95 (issn: 0031-9007, eissn: 1079-7114,

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Authors: J, Park; R A, Nebel; S, Stange; S Krupakar, Murali;

doi: 10.1103/physrevlett.95.015003

pmid: 16090625

Experimental Observation of a Periodically Oscillating Plasma Sphere in a Gridded Inertial Electrostatic Confinement Device

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Abstract

The periodically oscillating plasma sphere (POPS) [D. C. Barnes and R. A. Nebel, Phys. Plasmas 5, 2498 (1998).] oscillation has been observed in a gridded inertial electrostatic confinement device. In these experiments, ions in the virtual cathode exhibit resonant behavior when driven at the POPS frequency. Excellent agreement between the observed POPS resonance frequency and theoretical predictions has been observed for a wide range of potential well depths and for three different ion species. The results provide the first experimental validation of the POPS concept proposed by Barnes and Nebel [R. A. Nebel and D. C. Barnes, Fusion Technol. 34, 28 (1998).].

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Los Alamos National Laboratory
United States

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