Plasma hole

Plasma hole has been observed in a magnetized cylindrical plasma. The measurements of ion flow velocity revealed that the plasma hole has a sink flow to the core on a plane perpendicular to the magnetic field and also an axial flow. The vorticity distribution determined by the flow velocity field sh...

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Bibliographic Details
Published in:IEEE transactions on plasma science 2005-04, Vol.33 (2), p.454-455
Main Authors: Tanaka, M.Y., Nagaoka, K., Okamoto, A., Yoshimura, S., Kono, M.
Format: Article
Language:English
Subjects:
Burgers vortex
Cylindrical plasmas
directional Langmuir probe
Flow velocity
flow velocity field
Fluid dynamics
Fluid flow
Fluid flow measurement
Localization
Magnetic field measurement
Magnetic fields
Plasma
Plasma density
Plasma devices
plasma hole
Plasma measurements
Plasma properties
Plasma temperature
Position (location)
Probes
Velocity measurement
Viscosity
viscosity anomaly
Vorticity
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Description
Summary:Plasma hole has been observed in a magnetized cylindrical plasma. The measurements of ion flow velocity revealed that the plasma hole has a sink flow to the core on a plane perpendicular to the magnetic field and also an axial flow. The vorticity distribution determined by the flow velocity field shows localization near the center axis. According to the flow velocity field and the vorticity distribution, the plasma hole is identified as a Burgers vortex, which is intrinsic in viscous fluids and is observed in a plasma for the first time. The effective viscosity estimated from the characteristic scale length of vorticity localization exhibits an anomaly, which is three orders of magnitude higher than the classical value.
ISSN:0093-3813
1939-9375
DOI:10.1109/TPS.2005.845366