The effect of the use of different electrode materials for edge-plasma biasing on plasma density and floating potential modifications |
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| Authors: | V. Weinzettl V. Piffl J. Matejicek E. Dufkova J. Zajac R. Dejarnac V. Perina |
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| Affiliation: | (1) Institute of Plasma Physics, Acad. Sci. CR, Za Slovankou 3, 182 00 Praha 8, Czech Republic;(2) Institute of Nuclear Physics, Acad. Sci. CR, Rez, Czech Republic |
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| Abstract: | The effect of the use of different electrode materials for edge-plasma biasing on plasma density and floating-potential profile modifications has been recently investigated on the CASTOR tokamak. Dependences of biasing current, edge plasma density and floating potential on biasing voltage have been measured. Induced relaxation events and fast (10–50) kHz oscillations are shown and surface changes of the biasing electrodes are discussed in the paper. Presented at the Workshop “Electric Fields, Structures and Relaxation in Edge Plasmas”, Tarragona, Spain, July 3–4, 2005. |
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| Keywords: | biasing edge plasma plasma-facing materials |
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