Comparison of RF-heated with NBI-heated ELMy H-mode plasmas in JET
Abstract
RF heating in ELMy H-mode plasmas has been proposed for achieving ignition conditions in Tokamak reactors; however, NBI or combined NBI and RF heating have been more successful in approaching these conditions in present-day Tokamaks. Experiments were performed in JET matching well-diagnosed RF-heated with NBI-heated ELMy H-mode plasmas. The toroidal rotation rate in the plasmas with on-axis RF is about 20 percent that of the plasmas with NBI (co in JET), and increases with time. The tail temperature of the H-minority ions decreases with time. The central Zeff appears to be higher in the plasmas with RF. We compare global and local parameters in these plasmas, and discuss the results using Ion Temperature Gradient theory.
- Publication:
-
APS Division of Plasma Physics Meeting Abstracts
- Pub Date:
- October 2000
- Bibcode:
- 2000APS..DPPDO1006B