3-DIMENSIONAL TOKAMAK EQUILIBRIA AND STELLARATORS WITH 2-DIMENSIONAL MAGNETIC SYMMETRY

Three-dimensional computer codes have been developed to simulate equil ibrium, stability and transport in tokamaks and stellarators. Bifurcat ed solutions of the tokamak problem suggest that three-dimensional eff ects may be more important than has generally been thought. Extensive calculations have led to the discovery of a stellarator configuration with just two field periods and with aspect ratio 3.2 that has a magne tic field spectrum B-mn with toroidal symmetry. Numerical studies of e quilibrium, stability and transport for this new device, called the Mo dular Helias-like Heliac 2 (MHH2), will be presented.