Abstract
Values of have been achieved and sustained for several confinement times on the START spherical tokamak using additional heating provided by neutral beam injection. These values are more than twice the highest value previously obtained in a tokamak, and correspond to normalized values of . In these shots values of (where is the current flowing in the central toroidal field rod) have been obtained, which are considered to be necessary for spherical tokamak power plant. The results are compared with ideal-MHD stability theory.
- Received 17 November 1997
DOI:https://doi.org/10.1103/PhysRevLett.80.3972
©1998 American Physical Society