Overview of recent highlights from MAST

ORAL

Abstract

The MAST programme in support of the physics basis for ITER, DEMO and future devices based on spherical tokamaks is being facilitated by a number of recent enhancements. Twelve internal coils are now in place (6 each upper and lower, for n=3), which will be used in ELM mitigation studies at currents of up to 2 kA, and for TAE excitation and damping experiments. Magnetic perturbations from external (n=2) coils have already been used to double the ELM frequency in low collisionality H-modes. A second long-pulse PINI neutral heating beam has been installed (total beam power 5 MW). The Thomson scattering diagnostic has been upgraded with 4 more Nd:YAG lasers (8 in total, 240 Hz aggregate rate) and the number of spatial channels is being further increased to 120. A multi-chord MSE diagnostic has been constructed and installed (35 spatial channels, 2.5 cm resolution), and will be a key tool in the study of non-inductive current-drive. The present MAST campaign is focussed on exploiting our new capabilities, particularly in the areas of confinement {\&} transport, stability, ELMs, current-drive, non-inductive start-up and exhaust physics. This presentation will provide an overview of our recent results and future plans.

Authors

  • N.J. Conway

    for the MAST Team and collaborators