STEADY-STATE HOLLOW ELECTRON-TEMPERATURE PROFILES IN THE RIJNHUIZEN TOKAMAK PROJECT

Authors
HOGEWEIJ GMD OOMENS AAM BARTH CJ BEURSKENS MNA CHU CC VANGELDER JFM LOK J CARDOZO NJL PIJPER FJ POLMAN RW ROMMERS JH
Citation
Gmd. Hogeweij et al., STEADY-STATE HOLLOW ELECTRON-TEMPERATURE PROFILES IN THE RIJNHUIZEN TOKAMAK PROJECT, Physical review letters, 76(4), 1996, pp. 632-635
Citations number
24
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
76
Issue
4
Year of publication
1996
Pages
632 - 635
Database
ISI
SICI code
0031-9007(1996)76:4<632:SHEPIT>2.0.ZU;2-J
Abstract
In the Rijnhuizen Tokamak Project steady-state hollow electron tempera ture (T-e) profiles have been sustained with strong off-axis electron cyclotron heating, creating a region of reversed magnetic shear. pb In this region the effective electron thermal diffusivity (chi e(Pb)) is close to neoclassical in high density plasmas. For medium density, ch i e(Pb) is lower than neoclassical and may even be negative, indicatin g that off-diagonal elements in the transport matrix drive an electron heat flux up the T-e gradient.