Simultaneous Attainment of High Electron and Ion Temperatures in Discharges with Internal Transport Barriers in ASDEX Upgrade
Internal transport barriers have been demonstrated to exist also under conditions with T(e) approximately equals T(i) approximately equals 10 keV and predominantly electron heating of the tokamak core region. Central electron cyclotron heating was added to neutral beam injection-heated ASDEX Upgrade discharges with a pre-existing internal transport barrier, established through programmed current ramping leading to shear reversal. Compared to a reference internal transport barrier discharge without electron cyclotron resonance heating, the electron heat conductivity in the barrier region was found not to increase, in spite of a fivefold increase in electron heat flux, and also angular momentum and ion energy transport did not deteriorate.
Bibliographic Reference: Article: Physical Review Letters, Vol 84 (2000) No. 14, pp. 3097-3100
Availability: Physical Review Letters (Journal)
Record Number: 200012112 / Last updated on: 2000-07-12
Original language: en
Available languages: en