UKAEA Papers

"Evidence cross-validation and Bayesian inference of MAST plasma equilibria"

• G. T. Von Nessi
• M. J. Hole
• J. Svensson
• L. Appel

In this paper, current profiles for plasma discharges on the mega-ampere spherical tokamak are directly calculated from pickup coil, flux loop, and motional-Stark effect observations via methods based in the statistical theory of Bayesian analysis. By representing toroidal plasma current as a series of axisymmetric current beams with rectangular cr…

"Identifying the impact of rotation, anisotropy, and energetic particle physics in tokamaks"

• M.J.Hole
• G. Von Nessi
• M. Fitzgerald
• K. McClements
• The Mast Team

"An equilibrium validation technique based on Bayesian inference"

• M.J. Hole
• G. Von Nessi
• J. Svensson
• The Mast Team

"The use of Bayesian inversion to resolve plasma equilibrium"

• M. J. Hole
• G. Von Nessi
• D. Pretty
• J. Howard
• B. Blackwell
• J. Svensson
• L. C. Appel

Recently, Bayesian probability theory has been used at a number of experiments to fold uncertainties and interdependencies in the diagnostic data and forward models, together with prior knowledge of the state of the plasma, to increase accuracy of inferred physics variables. A new probabilistic framework, MINERVA, based on Bayesian graphical models…