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Title:
Experimental Observation of a Periodically Oscillating Plasma Sphere in a Gridded Inertial Electrostatic Confinement Device
Authors:
Park, J.; Nebel, R. A.; Stange, S.; Murali, S. Krupakar
Affiliation:
AA(Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA), AB(Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA), AC(Los Alamos National Laboratory, Los Alamos, New Mexico 87544, USA), AD(University of Wisconsin, Madison, Wisconsin 53706, USA)
Publication:
Physical Review Letters, vol. 95, Issue 1, id. 015003 (PhRvL Homepage)
Publication Date:
06/2005
Origin:
APS
PACS Keywords:
Electrostatic and high-frequency confinement, Nonneutral plasmas
DOI:
10.1103/PhysRevLett.95.015003
Bibliographic Code:
2005PhRvL..95a5003P

Abstract

The periodically oscillating plasma sphere (POPS) [D. C. Barnes and R. A. Nebel, Phys. Plasmas 5, 2498 (1998)., PHPAEN, 1070-664X, 10.1063/1.872933] 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)., FUSTE8, 0748-1896].
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