UKAEA Papers

"FUSION ENERGY DEVELOPMENT APPLICATIONS UTILIZING THE SPHERICAL TOKAMAK AND ASSOCIATED RESEARCH NEEDS AND TOOLS"

• J.E. Menard
• R. Majeski
• M. Ono
• N.N. Bakharev
• V.K. Gusev
• M. Gryaznevich
• D. Kingham
• S. McNamara
• P. Thomas
• K. Hanada
• J. Harrison
• B. Lloyd
• Y.S. Hwang
• B. Lipschultz
• H. Wilson
• Y. Nagayama
• Y. Ono
• Y. Takase
• M. Reinke
• K. Tobita
• Z. Gao
• F. Alladio
• R.J. Fonck

The spherical torus/tokamak (ST) is a potentially attractive configuration for narrowing scientific and technical gaps to a fusion demonstration power plant and as a more compact and/or modular fusion power source. Due to a reduced plasma surface area to volume ratio, the ST configuration offers the potential to access high power exhaust heat fl…

"Non-Axisymmetric Equilibrium and Stability using the ELITE Stability Code"

• M.S. Anastopoulos-Tzanis
• B.D. Dudson
• C.J. Ham
• C.C. Hegna
• P.B. Snyder
• H.R. Wilson

A linear perturbation theory is used to model the MHD stability of tokamak equilibria under the application of external 3D magnetic perturbations [C.C. Hegna, Physics of Plasmas 21 :072502, 2014]. The symmetry breaking produces the coupling of toroidal n modes. We use ELITE [H.R. Wilson et al., Physics of Plasmas 9 :1277, 2002] to produ…

"The bundle divertor - Part 2 Plasma Properties"

• PE Stott
• CM Wilson
• A Gibson

"The bundle divertor - Part 1 - Magnetic Configuration"

• PE Scott
• CM Wilson
• A Gibson

"The ultraviolet emission spectrum of the solar chromosphere and corona"

• WM Burton
• A Ridgeley
• R Wilson

"Observations of the sun in the extreme ultraviolet"

• WS Black
• D Booker
• WM Burton
• BB Jones
• DB Shenton
• R Wilson

"The spectroscopy of non-thermal plasmas"

• R Wilson

"Simulations of edge localised mode instabilities in MAST-U Super-X tokamak plasmas"

• S.F. Smith
• S.J.P. Pamela
• A. Fil
• M. Hoelzl
• G.T.A. Huijsmans
• A. Kirk
• D. Moulton
• O. Myatra
• A.J. Thornton
• H.R. Wilson

ELM simulations for the MAST-U Super-X tokamak have been obtained, using the JOREK code. The JOREK visco-resistive MHD model has been used to obtain comparisons of divertor configurations. The simulations show a factor 10 decrease in the peak heat flux to the outer target of the Super-X in comparison to a conventional divertor configuration. A roll…

"ELM burn-through predictions for MAST-U Super-X plasmas"

• S.F. Smith
• S.J.P. Pamela
• M. Hölzl
• G.T.A. Huijsmans
• A. Kirk
• D. Moulton
• A.J. Thornton
• H.R. Wilson

During edge localised modes (ELMs) high heat fluxes are incident on divertor targets, which future fusion devices will not withstand [1]. A solution to reduce the heat fluxes could be the new Super-X divertor, which will be tested on the MAST-U tokamak. The divertor has an increased connection length, magnetic flux expansion and is designed to reta…

"The Impact of Symmetry Breaking on Pedestal Stability of Tokamak Plasmas"

• M.S. Anastopoulos-Tzanis
• C.H. Ham
• H.R. Wilson

H-mode tokamak plasmas are typically characterised by quasi-periodic instabilities called edge localised modes (ELMs) driven by unstable peeling-ballooning modes [1]. For large scale fusion power plants, the predicted particle and heat fluxes are unacceptable, and an active ELM control method is required. One promising method relies on t…