Equilibrium and stability analyses have identified a class of tokamak configurations with conventional safety factor profiles (q0∼qmin≳1) at moderately high li(li∼1.0), and high normalized β(βN∼3.5-4.0), that are stable to the ideal n = 1 kink without the requirement of wall stabilization. In contrast to previously identified high li, high βN equilibria, these configurations have high bootstrap current fractions (fBS∼50%-70%); they require only modest central current drive for maintaining steady state and are therefore compatible with advanced tokamak (AT) operation. Strong plasma shaping is crucial for achieving the high β and high bootstrap fraction simultaneously.
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics