UKAEA Papers

"Framework for Assessment of Magnetic Equilibrium Controller Performance on the MAST Upgrade Spherical Tokamak"

• A. Lvovskiy
• H. Anand
• A. S. Welander
• M. Kochan
• C. Vincent
• G. McArdle
• J. Lovell
• Z. Xing
• J. L. Barr
• E. Cho
• B. Sammuli
• D. A. Humphreys
• N. W. Eidietis
• V. Soukhanovskii
• A. Leonard
• A. O. Nelson
• A. Thornton
• J. Harrison

In this work we present the assessment framework for magnetic equilibrium controllers on MAST-U spherical tokamak. Such controllers are essential for MAST-U since exhaust physics and core-edge integration studies require advanced divertor plasma configurations. The developed framework is based on the TokSys suite of plasma control codes, which was …

"Improved Interpretation of Stark Broadening Data from Detached Divertor Plasmas"

• S. Lisgo
• N. Brooks
• E. Oks
• M. Groth
• A. W. Leonard
• et al.

"Edge localized modes and the pedestal: A model based on coupled peeling–ballooning modes"

• P. B. Snyder
• H. R. Wilson
• J. R. Ferron
• L. L. Lao
• A. W. Leonard
• et al.

A model based on magnetohydrodynamic (MHD) stability of the tokamak plasma edge region is presented, which describes characteristics of edge localized modes (ELMs) and the pedestal. The model emphasizes the dual role played by large bootstrap currents driven by the sharp pressure gradients in the pedestal region. Pedestal currents reduce the edge m…

"REAL-TIME ELECTRONIC NEURAL NETWORKS FOR ITER-LIKE MULTIPARAMETER EQUILIBRIUM RECONSTRUCTION AND CONTROL IN COMPASS-D"

• Colin George Windsor
• Thomas Noel Todd
• David Leonard Trotman
• Michael Edward Underhill Smith

The plasma position and shape on the COMPASS-D tokamak have been controlled simultaneously with a 75- kHz bandwidth, hard-wired, real-time neural network. The primary network operates with up to 48 selected magnetic inputs and has been used in the vertical position control loop to control the position of the upper edge of the plasma at the radius o…