Diagnostics for radial electric field measurements in hot magnetized plasmas |
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Authors: | A J H Donné A V Melnikov G Van Oost |
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Institution: | (1) FOM-Instituut voor Plasmafysica ‘Rijnhuizen’, Associatie EURATOM-FOM, PO Box 1207, 3430 BE Nieuwegein, The Netherlands;(2) Russian Research Center ‘Kurchatov Institute’, Moscow, Russia;(3) Ghent University, Gent, Belgium |
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Abstract: | Measurements of the radial electric field profile in magnetically confined plasmas have yielded important new insights in
the physics of L-H transitions, edge biasing and/or the active control of Internal and Edge Transport Barriers. The radial
electric field is not an easy plasma parameter to diagnose. Techniques to measure the radial electric field in the plasma
core are the Heavy Ion Beam Probe and the Motional Stark Effect. An indirect method that is quite often applied is to derive
the electric field from measurements of the poloidal and toroidal rotation velocities via the radial ion force balance. This
paper will first briefly explain the need for detailed measurements of the radial electric field profile. Subsequently, the
various diagnostics to measure this parameter will be reviewed. The emphasis will be especially put on recent trends, rather
than on an exhaustive overview.
Presented at 5th Workshop “Role of Electric Fields in Plasma Confinement and Exhaust”, Montreux, Switzerland, June 23–24,
2002.
Partner in the Trilateral Euregio Cluster |
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Keywords: | 52 70 -m 52 70 Ds 52 70 Nc 52 07 Kz |
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