STUDY OF INTERNAL TRANSPORT BARRIERS BY COMPARISON OF REVERSED SHEAR AND HIGH-BETA(P) DISCHARGES IN JT-60U

Authors
KOIDE Y MORI M FUJITA T SHIRAI H HATAE T TAKIZUKA T KIMURA H OIKAWA T ISEI N ISAYAMA A TAKEJI S KAWANO Y SAKASAI A KAMADA Y FUKUDA T ISHIDA S
Citation
Y. Koide et al., STUDY OF INTERNAL TRANSPORT BARRIERS BY COMPARISON OF REVERSED SHEAR AND HIGH-BETA(P) DISCHARGES IN JT-60U, Plasma physics and controlled fusion, 40(5), 1998, pp. 641-645
Citations number
16
Categorie Soggetti
Phsycs, Fluid & Plasmas","Physics, Nuclear
Journal title
Plasma physics and controlled fusion → ACNP
ISSN journal
07413335
Volume
40
Issue
5
Year of publication
1998
Pages
641 - 645
Database
ISI
SICI code
0741-3335(1998)40:5<641:SOITBB>2.0.ZU;2-Z
Abstract
Reduction of electron thermal diffusivity chi(e) was investigated by c omparing the internal transport barrier (ITB) with that of high-beta(p ) discharges. In reversed shear discharges heated by neutral beams, ch i(e) reduction was significant when negative magnetic shear was strong . Radial location of ITB propagated outwards and then localized near t he region of q-minimum for both the ion and the electron channels. Red uction In chi(e) was also observed in the electron heating regime by i on cyclotron heating.