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The mega amp spherical tokamak
H. Meyer CCFE, Culham Science Centre, Abingdon, Oxon, United Kingdom
Abstract
The Mega Amp Spherical Tokamak (MAST) is one the largest tight aspect ratio A = R/a ≈ 1.5 tokamaks in the world. Operating since 1998 research on MAST contributed strongly to the ITER/DEMO physics basis, future spherical tokamak concepts and basic plasma science. With temperatures of Te,i ≲ 3keV, densities of 
e≲1.4 × 1020m−3) and a plasma current of ≲1.2 MA MAST parameters are comparable conventional tokamaks with similar poloidal cross section (DIII-D, ASDEX Upgrade), despite the much lower toroidal field. After its current substantial ...
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