Alfvén wave current drive in the Phaedrus‐T tokamak

Autor:	M. Kishinevsky, R. A. Breun, D. Diebold, S. Wukitch, Artour G Elfimov, M. Doczy, D. Edgell, Thomas Intrator, P. D. Nonn, C. Litwin, P. H. Probert, Noah Hershkowitz, G.R. Winz, D. Brouchous, M. Vukovic, P. E. Moroz
Rok vydání:	1995
Předmět:	Physics Tokamak Plasma Condensed Matter Physics law.invention Alfvén wave Nuclear magnetic resonance law Electrical resistivity and conductivity Figure of merit Electron temperature Current (fluid) Atomic physics Voltage
Zdroj:	Physics of Plasmas. 2:2263-2271
ISSN:	1089-7674 1070-664X
Popis:	The first experimental evidence of Alfven Wave Current Drive (AWCD) in a tokamak is shown. In a low‐density experiment, an estimated 20–35 kA out of 65 kA total current, or 30%–55% of the total current has been driven. The estimated efficiency for current driven per unit RF input power is approximately ICD/PRF≊0.2 A/W, which is near the predicted efficiency, and corresponds to the commonly used figure of merit, neR0ICD/PRF≊0.4×1018 A m−2 W−1, where ne is plasma density and R0 is the major radius. The significant 30%–40% drop in loop voltage observed cannot be explained by any plausible increase in electron temperature Te, or decrease in inductive plasma energy, or changes in plasma resistivity. Independently measured loop voltage, Te, effective ionic charge Zeff, and plasma inductance and resistance are all consistent with this conclusion.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::82cd07e3294cb9f41034baa5ff2e9cb0 https://doi.org/10.1063/1.871249 Zobrazit plný text záznamu