Overview of new MAST physics in anticipation of first results from MAST Upgrade

作者：J. Harrison, R. Akers, S. Allan, J. S. Allcock, J. Allen, L. Appel, M. Barnes, N. Ben Ayed, W. Boeglin, C. Bowman, James W. Bradley, P. K. Browning, Paul M. Bryant, M. Carr, M. Cecconello, C. Challis, S. C. Chapman, I.T. Chapman, Greg Colyer, S. Conroy, N. J. Conway, M. Cox, G. Cunningham, R. O. Dendy, W. Dorland, B. Dudson, L. Easy, S. Elmore, Thomas A. Farley, X. Feng, A. R. Field, A. Fil, G. Fishpool, Michael L. Fitzgerald, Kurt Flesch, Michael F. J. Fox, H. Frerichs, Sulochana Gadgil, D.S. Gahle, L. Garzotti, Young-chul Ghim, S. Gibson, K.J. Gibson, S. Hall, Christopher Ham, N. Heiberg, S. Henderson, Edmund Highcock, B. Hnat, J. Howard, Jie Huang, S W A Irvine, A. S. Jacobsen, O. Jones, Ioannis Katramados, D. Keeling, A. Kirk, I. Klimek, L. A. Kogan, Jack Leland, B. Lipschultz, B. Lloyd, J. Lovell, B. Madsen, Oliver H.R. Marshall, R. Martín, G. McArdle, K. G. McClements, B. F. McMillan, A. Meakins, H. Meyer, F. Militello, J. Milnes, S. Mordijck, A.W. Morris, D. Moulton, D.G. Muir, Karan Mukhi, S Murphy-Sugrue, O. Myatra, G. Naylor, Patrick A. Naylor, S. L. Newton, T. O’Gorman, John Omotani, M. O’Mullane, Sam Orchard, S. Pamela, L. Pangione, F. I. Parra, R. V. Perez, L. Piron, M. Price, M.L. Reinke, Fabio Riva, C.M. Roach, D. Robb, D. A. Ryan, S. Saarelma, M. Salewski, S. Scannell, A. A. Schekochihin, O. Schmitz, S. E. Sharapov, R. M. Sharples, S. Silburn, S. Smith, A. Sperduti, R. Stephen, N. Thomas-Davies, A. Thornton, M. Turnyanskiy, M. Valovič, Ferdinand Van Wyk, R. G. L. Vann, N. Walkden, Ian Waters, H. R. Wilson, the MAST-U Team and the EUROfusion MST1 Team · 发表于：Nuclear Fusion · 年份：2019 · DOI：10.1088/1741-4326/ab121c · 被引用次数：63 · 研究领域：Magnetic confinement fusion research、Superconducting Materials and Applications、Particle accelerators and beam dynamics

The mega amp spherical tokamak (MAST) was a low aspect ratio device ( R / a = 0.85/0.65 ~ 1.3) with similar poloidal cross-section to other medium-size tokamaks. The physics programme concentrates on addressing key physics issues for the operation of ITER, design of DEMO and future spherical tokamaks by utilising high resolution diagnostic measurements closely coupled with theory and modelling to significantly advance our understanding. An empirical scaling of the energy confinement time that favours higher power, lower collisionality devices is consistent with gyrokinetic modelling of electron scale turbulence. Measurements of ion scale turbulence with beam emission spectroscopy and gyrokinetic modelling in up-down symmetric plasmas find that the symmetry of the turbulence is broken by flow shear. Near the non-linear stability threshold, flow shear tilts the density fluctuation correlation function and skews the fluctuation amplitude distribution. Results from fast particle physics studies include the observation that sawteeth are found to redistribute passing and trapped fast particles injected from neutral beam injectors in equal measure, suggesting that resonances between the m = 1 perturbation and the fast ion orbits may be playing a dominant role in the fast ion transport. Measured D–D fusion products from a neutron camera and a charged fusion product detector are 40% lower than predictions from TRANSP/NUBEAM, highlighting possible deficiencies in the guiding centre app...