Biasing of closed double null poloidal divertor plates on TdeV

Autor: A. Sarkissian, J. Kalnavarns, W. Zuzak, H.H. Mai, A. Boileau, D. Pinsonneault, R. Neufeld, D. Michaud, E. Haddad, G. Abel, N. Richard, D. Lafrance, C. Liu-Hinz, B.C. Gregory, E. Knystautas, V. Glaude, P. Couture, M. St-Onge, G. Le Clair, R. Décoste, Barry L. Stansfield, L. Gauthier, C. Janicki, F. Martin, B. Terreault, Guy G. Ross, Dennis Whyte, J.-L. Lachambre, A. Hubbard, C. Boucher
Rok vydání: 1992
Předmět:
Zdroj: Physics Letters A. 163:204-208
ISSN: 0375-9601
DOI: 10.1016/0375-9601(92)90409-f
Popis: Bias voltages applied to the divertor plates in TdeV (Tokamak de Varennes) permit fine control of several main plasma parameters, including the poloidal rotation velocity near the separatrix, microturbulence, the sawtooth period and the heat pulse propagation speed. Biasing also improves the divertor efficiency in either the top or bottom closed divertor chamber depending on polarity, in agreement with E × B drifts. Negative biasing reduces carbon and CO fluxes from the wall, the loop voltage and the X-ray emissivity, all indicative of decreasing impurity contamination.
Databáze: OpenAIRE