The role of neoclassical convection in the confinement improvement of plasmas with impurity injection in DIII-D

Authors
Citation
Wm. Stacey, The role of neoclassical convection in the confinement improvement of plasmas with impurity injection in DIII-D, PHYS PLASMA, 8(8), 2001, pp. 3689-3694
Citations number
11
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS OF PLASMAS
ISSN journal
1070-664X → ACNP
Volume
8
Issue
8
Year of publication
2001
Pages
3689 - 3694
Database
ISI
SICI code
1070-664X(200108)8:8<3689:TRONCI>2.0.ZU;2-Y
Abstract
A series of three otherwise identical DIII-D [J. L. Luxon, F. Batty, C. B. Baxi , Plasma Physics and Controlled Nuclear Fusion Research 1986 (Internat ional Atomic Energy Agency, Vienna, 1987), Vol. I, p. 159] L-mode (low conf inement mode) plasma experiments with and without neon injection was analyz ed with neoclassical theory. The measured increases in momentum and energy confinement times, central rotation speed, and ExB with increasing neon inj ection are predicted quantitatively by neoclassical theory, in particular b y the predicted increase in the inward neoclassical convective momentum and energy fluxes with neon injection. This agreement between theory and exper iment suggests that the physical mechanism by means of which neon injection improves the confinement of these L-mode DIII-D plasmas is to increase the inward neoclassical particle flux, and hence increase the inward convectiv e momentum and energy fluxes. (C) 2001 American Institute of Physics.