Journal ArticleDOI
Reconstruction of current profile parameters and plasma shapes in tokamaks
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TLDR
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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Study of External Kink Modes in Shaped HBT-EP Plasmas
TL;DR: In this article, external kink modes in Shaped HBT-EP Plasmas were studied in the presence of external Kink Modes in the HBT and EP plasmas.
Journal ArticleDOI
Stochastic boundary modeling by resonant magnetic perturbations on DIII-D
L.W. Yan,Todd Evans +1 more
TL;DR: In this paper, a 3D field line integration code (TRIP3D) is used to trace stochastic field lines in the edge of DIII-D plasmas in which edge localized modes (ELMs) are suppressed by resonant magnetic perturbations (RMPs).
Journal ArticleDOI
Overview of the recent DiMES and MiMES experiments in DIII-D
D L Rudakov,C C Wong,Andrey Litnovsky,W R Wampler,J. A. Boedo,N. H. Brooks,M E Fenstermacher,M. Groth,E. M. Hollmann,Wolfgang Jacob,S. Krasheninnikov,K. Krieger,C J Lasnier,A. W. Leonard,Adam McLean,M Marot,R. A. Moyer,T. W. Petrie,V. Philipps,Roman Smirnov,P.C. Stangeby,J G Watkins,W. P. West,J H Yu +23 more
TL;DR: In this paper, the authors used divertor and midplane material evaluation systems (DiMES and MiMES) in the DIII-D tokamak to address a variety of plasma-material interaction (PMI) issues relevant to ITER.
Journal ArticleDOI
Edge x-ray imaging measurements of plasma edge in Alcator C-Mod
T. Sunn Pedersen,Robert Granetz +1 more
TL;DR: In this paper, the authors measured the soft x-ray emissivity using an array of 38 photodiodes viewing the plasma through a narrow aperture, where the viewing chords are separated by about 1 mm in the plasma region and have minimal overlap.
Dissertation
Approximation dans des classes de fonctions analytiques généralisées et résolution de problèmes inverses pour les tokamaks
TL;DR: In this article, the authors propose an approach for solving equations of diffusion isotropes in the domain of Cauchy (potentiel, flux) disponibles sur une partie de la frontiere du domaine.
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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