Abstract
Peaked pressure profiles and central ion temperatures up to 20 keV are observed in DIII-D H-mode discharges with a central region of strongly reversed magnetic shear. Short wavelength ballooning modes are stabilized by access to the second stable regime, longer wavelength modes by a conducting wall and possibly by rotational shear. Values of normalized beta, N=aBI, up to 4 (%-m-T/MA), energy confinement are a factor of 3 better than L mode, and at least 50% of the noninductive plasma current in this regime demonstrates compatibility with requirements for a steady-state high-beta tokamak power plant.
Original language | English |
---|---|
Pages (from-to) | 4421-4424 |
Number of pages | 4 |
Journal | Physical review letters |
Volume | 75 |
Issue number | 24 |
DOIs | |
Publication status | Published - 1995 Jan 1 |
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)