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
More filters
Journal ArticleDOI
Self-consistent modeling of CFETR baseline scenarios for steady-state operation
Jiale Chen,Xiang Jian,Vincent Chan,Vincent Chan,Zeyu Li,Zhao Deng,Guoqiang Li,Wenfeng Guo,Nan Shi,Xi Chen,Cfetr Physics Team +10 more
Journal ArticleDOI
Transition to subcritical turbulence in a tokamak plasma
F. van Wyk,Edmund Hood Highcock,Alexander Schekochihin,Colin Roach,A. R. Field,William Dorland +5 more
TL;DR: In this paper, the authors investigated the stability of the inner core of the Mega-Ampere Spherical Tokamak (MAST) and showed that the system is stable to small perturbations, but, given a large enough initial perturbation, it transitions to a turbulent state.
Journal ArticleDOI
Physics-constrained, low-dimensional models for magnetohydrodynamics: First-principles and data-driven approaches.
TL;DR: This work develops a reduced-order modeling framework for compressible plasmas, leveraging decades of progress in projection-based and data-driven modeling of fluids and demonstrates the effectiveness of this approach on data from high-fidelity numerical simulations of a three-dimensional spheromak experiment.
Journal ArticleDOI
Results from current drive experiments on the Helicity Injected Torus
TL;DR: The Helicity Injected Torus [T. R. Jarboe, 1989] is a low aspect ratio tokamak that is formed and sustained by coaxial helicity injection with no transformer.
Journal ArticleDOI
Status and verification of edge plasma turbulence code BOUT
TL;DR: The BOUT code is a detailed numerical model of tokamak edge turbulence based on collisional plasma fluid equations that solves for time evolution of plasma fluid variables in realistic 3D divertor toKamak geometry.
References
More filters
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.
Related Papers (5)
Plasma Physics and Controlled Nuclear Fusion Research
Neoclassical conductivity and bootstrap current formulas for general axisymmetric equilibria and arbitrary collisionality regime
Suppression of large edge-localized modes in high-confinement DIII-D plasmas with a stochastic magnetic boundary.
Todd Evans,R.A. Moyer,P R Thomas,J.G. Watkins,T.H. Osborne,Jose Boedo,E. J. Doyle,Max E. Fenstermacher,K.H. Finken,R. J. Groebner,M. Groth,J. H. Harris,R.J. La Haye,C.J. Lasnier,Suguru Masuzaki,Nobuyoshi Ohyabu,D. G. Pretty,T. L. Rhodes,H. Reimerdes,D.L. Rudakov,M.J. Schaffer,G. Wang,Lei Zeng +22 more