Experimental verification of the dielectric constant of a magnetized rotating plasma

Journal Article · Wed Jun 15 04:00:00 EDT 2005 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.1924391· OSTI ID:20764288

Teodorescu, C; Ellis, R F; Case, A; Cothran, C; Hassam, A; Lunsford, R; Messer, S ^[1]

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1. University of Maryland, College Park, Maryland 20742 (United States)

Direct measurements confirm that the magnetized plasma perpendicular dielectric constant has a linear dependence on the plasma density for fixed magnetic field, as predicted by magnetohydrodynamic (MHD) theory. In experiments performed on the Maryland Centrifugal Experiment (MCX) [R. F. Ellis, A. B. Hassam, S. Messer, and B. R. Osborn, Phys. Plasmas, 8, 2057 (2001)], line-averaged hydrogen plasma electron density is measured using a Mach-Zehnder interferometer. For small rotational Alfven Mach numbers, the measured size of the perpendicular plasma dielectric constant is also in agreement with MHD theory. Plasma density in the range of (1-8)x10{sup 20} m{sup -3} and relative perpendicular plasma dielectric constant of the order of 10{sup 6} are measured.

• OSTI ID: 20764288
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 6 Vol. 12; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ELECTRON DENSITY
HYDROGEN
MAGNETOHYDRODYNAMICS
PERMITTIVITY
PLASMA DENSITY
PLASMA DIAGNOSTICS
ROTATING PLASMA