Title: Measurements of velocity shear and ion viscosity profile in a magnetohydrodynamic plasma jet
Authors: Dorf, LA ×
Intrator, T
Sun, X
Hendryx, J
Wurden, GA
Furno, I
Lapenta, Giovanni #
Issue Date: 17-Jan-2010
Publisher: American Institute of Physics
Series Title: Physics of Plasmas vol:17 issue:10
Article number: 102101
Abstract: Time-dependent, two-dimensional profiles of the axial flow velocity, density, electron temperature, and magnetic field components are measured at two axial locations in a screw pinch plasma column of the reconnection scaling experiment. The results show that the ion momentum flux for a given column radius is dissipated by the ion-ion Coulomb scattering viscosity due to a significant radial shear of the axial velocity. By comparing the terms of the magnetohydrodynamic momentum balance equation, radial profile of ion viscosity is determined. Chord-integrated ion temperature measurements performed at several radial locations using Doppler broadening spectroscopy show ion temperature of about 1 eV. Measured ion viscosity agrees within a factor of 2 with the classical Braginskii expectations.
ISSN: 1070-664X
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Plasma-astrophysics Section
× corresponding author
# (joint) last author

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