Improved confinement with reversed magnetic shear in TFTR

Journal Article · Fri Dec 01 04:00:00 EST 1995 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.75.4417· OSTI ID:277343

Levinton, F M; Zarnstorff, M C; Batha, S H; Bell, M; Bell, R E; Budny, R V; Bush, C; Chang, Z; Fredrickson, E; Janos, A; Manickam, J; Ramsey, A; Sabbagh, S A; Schmidt, G L; Synakowski, E J; Taylor, G ^[1]

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1. Fusion Physics and Technology, Torrance, California 90503 (United States)

A new tokamak confinement regime has been observed on the Tokamak Fusion Test Reactor (TFTR) where particle and ion thermal diffusivities drop precipitously by a factor of {approximately}40 to the neoclassical level for the particles and to much less than the neoclassical value for the ions in the region with reversed shear. This enhanced reversed shear confinement mode allows the central electron density to rise from 0.45{times}10{sup 20} m{sup {minus}3} to {approximately}1.2{times}10{sup 20} m{sup {minus}3} with {ital T}{sub {ital i}}{approximately}24 keV and {ital T}{sub {ital e}}{approximately}8 keV. This regime holds promise for significantly improved tokamak performance. {copyright} {ital 1995 The American Physical Society.}

• Research Organization: Princeton Plasma Physics Laboratory
• DOE Contract Number: AC02-76CH03073
• OSTI ID: 277343
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 24 Vol. 75; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
CONFINEMENT
ELECTRON DENSITY
MAGNETIC PROPERTIES
PLASMA
SHEAR
TFTR TOKAMAK
THERMAL DIFFUSION