Journal ArticleDOI
Reconstruction of current profile parameters and plasma shapes in tokamaks
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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Journal ArticleDOI
Development of a Gyrokinetic Particle-in-Cell Code for Whole-Volume Modeling of Stellarators
Toseo Moritaka,Robert Hager,Michael Cole,Samuel Lazerson,Choong-Seock Chang,Seung-Hoe Ku,S. Matsuoka,Shinsuke Satake,Seiji Ishiguro +8 more
TL;DR: In this article, a gyrokinetic particle-in-cell code for the whole-volume modeling of stellarators is presented, which is achieved through two modifications to the X-point Gyrokinetics Code (XGC), originally developed for tokamaks.
Journal ArticleDOI
Measurements of large poloidal variations of impurity density in the Alcator C-Mod H-mode barrier region
T. Sunn Pedersen,Robert Granetz,E. S. Marmar,D. A. Mossessian,Jerry Hughes,Ian H. Hutchinson,J.L. Terry,J. E. Rice +7 more
TL;DR: Huttenlocher et al. as discussed by the authors derived impurity density profiles from simultaneous high-resolution measurements of soft x-ray emission at the top and outboard edge of the Alcator C-Mod tokamak.
Journal ArticleDOI
Real Time Equilibrium Reconstruction Algorithm in EAST Tokamak
TL;DR: In this article, the EFIT (equilibrium fitting code) is used for reference and the computational efforts are reduced by parametrizing the current profile linearly in terms of a number of physical parameters.
Journal ArticleDOI
Linear peeling–ballooning mode simulations in snowflake-like divertor configuration using BOUT++ code
TL;DR: In this article, a set of reduced magnetohydrodynamics (MHD) equations is found to simulate the linear P?B mode in both snowflake plus and standard (STD) single-null divertor configurations.
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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