Tokamak edge plasma rotation in the presence of the biased electrode |
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Authors: | M Ghoranneviss S Mohammadi A Salar Elahi R Arvin |
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Affiliation: | Plasma Physics Research Center, Science and Research Branch, Islamic Azad University, Tehran, Iran |
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Abstract: | Electrode biasing system was designed, constructed, and installed on the IR-T1 tokamak, and then biasing experiments were carried out. Also, using a Mach probes the effects of radial electric field (produced by biased electrode) on the poloidal and toroidal components of the edge plasma velocity were investigated. The results showed an increase in both toroidal and poloidal components of the edge plasma velocity during biasing regime. Results compared and discussed. During positive biasing, increased Er tends to slow the poloidal rotation in the electron diamagnetic drift direction, i.e., to speed up rotation in the ion diamagnetic drift direction. An increased toroidal rotation velocity has the opposite effect on the poloidal rotation. |
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