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The ion current collected by a probe in a magnetized plasma is sensitive to the angle between its surface and the flow streamlines. This intuitive concept is the basis of the Gundestrup probe, a polar array of planar collectors mounted around an insulating housing. Probe theory for measuring flows has been developed on two fronts: Recent kinetics and fluid models, reviewed here, give similar predictions for the collected current within the range of applicability of the model assumptions. A comparison with measurements by a rotating Mach probe in the CASTOR tokamak highlights the role of magnetization in ion collection at grazing angles of incidence between the probe surface and the magnetic field lines.

Additional information

Authors: GUNN J P, DRFC, CEA, Cadarache, Saint-Paul-lez-Durance (FR);DEVYNCK P, DRFC, CEA, Cadarache, Saint-Paul-lez-Durance (FR);BOUCHER C, INRS-Energie et materiaux, Varennes, Quebec (CA);DURAN I ET AL, Institute of Plasma Physics, Praha (CZ);DYABILIN K, Institute for High Energy Densities, Moscow (RU);VAN OOST G, Department of Applied Physics, Ghent University, Gent (BE);VAN GOUBERGEN H, Department of Applied Physics, Ghent University, Gent (BE)
Bibliographic Reference: An article published in: Physics of Plasma, Vol.8, No.5 (2001), pp.1995-2001
Record Number: 200113848 / Last updated on: 2001-10-05
Original language: en
Available languages: en
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