Journal ArticleDOI
Reconstruction of current profile parameters and plasma shapes in tokamaks
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In this paper, an efficient method is given to reconstruct the current profile parameters, the plasma shape, and a current profile consistent with the magnetohydrodynamic equilibrium constraint from external magnetic measurements, based on a Picard iteration approach.Abstract:
An efficient method is given to reconstruct the current profile parameters, the plasma shape, and a current profile consistent with the magnetohydrodynamic equilibrium constraint from external magnetic measurements, based on a Picard iteration approach which approximately conserves the measurements. Computational efforts are reduced by parametrizing the current profile linearly in terms of a number of physical parameters. Results of detailed comparative calculations and a sensitivity study are described. Illustrative calculations to reconstruct the current profiles and plasma shapes in ohmically and auxiliarily heated Doublet III plasmas are given which show many interesting features of the current profiles.read more
Citations
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Journal ArticleDOI
Edge turbulent transport toward the L–H transition in ASDEX Upgrade and JET-ILW
Nicola Bonanomi,C. Angioni,U. Plank,P. A. Schneider,C. F. Maggi,EUROfusion Mst Team,Jet Contributors +6 more
TL;DR: In this paper, the authors combine experimental observations from the ASDEX Upgrade and the JET-ILW tokamaks and related gyrokinetic simulations on the L-mode edge turbulence with different isotopes.
Three-dimensional plasma transport in open chaotic magnetic fields : a computational assessment for tokamak edge layers
TL;DR: In this paper, the EMC3-EIRENE code is used for quantification of self-consistent kinetic neutral gas and plasma fluid flows in 3D (partially chaotic) magnetic fields, in the absence of any common symmetries for plasma and neutral gas dynamics.
Journal ArticleDOI
Slow crash in modified sawtooth patterns driven by localized electron cyclotron heating and current drive in KSTAR
TL;DR: In this paper, a detailed 2D imaging diagnostics of KSTAR plasmas with localized heating and current drive close to the sawtooth inversion radius (ρ inv) was performed.
Journal ArticleDOI
Carbonization of the DIII-D tokamak
TL;DR: The DIII-D tokamak has been carbonized by the application of a carbon film covering all plasma facing surfaces in order to reduce the metal impurity influx and central metal accumulation especially during beam heated D{sup O} {yields}D{sup +} H-mode discharges.
References
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Journal ArticleDOI
Separation of β̄p and ℓi in tokamaks of non-circular cross-section
TL;DR: In this paper, integral relations for the average poloidal beta p and the plasma internal inductance li are derived from the magnetohydrodynamic (MHD) equilibrium equation for an axisymmetric torus.
Journal ArticleDOI
Computation of ideal MHD equilibria
TL;DR: In this paper, a review of two-and three-dimensional ideal MHD equilibrium codes, with particular emphasis on axisymmetric toroidal calculations, is presented. But this paper is restricted to the case of Tokyoamak geometry.
Journal ArticleDOI
An efficient technique for magnetic analysis of non-circular, high-beta tokamak equilibria
D.W. Swain,G.H. Neilson +1 more
TL;DR: In this paper, a method for determining plasma shape and global properties of high-beta non-circular tokamak equilibria (βp, β, q and li) from magnetic sensor data is described.
Journal ArticleDOI
Magnetic analysis of non-circular cross-section tokamaks
J.L. Luxon,B.B. Brown +1 more
TL;DR: In this paper, the MHD equilibrium configuration for circular and non-circular plasmas from measurements of the magnetic field and flux made outside the discharge was determined using least squares minimization techniques.
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