Journal ArticleDOI
Reconstruction of current profile parameters and plasma shapes in tokamaks
Reads0
Chats0
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
Comparison of different linearized plasma response models on the EAST tokamak
Journal ArticleDOI
Importance of resistivity on edge-localized mode onset in spherical tokamaks
TL;DR: In this paper, the impact of realistic plasma resistivity on the linear stability of peeling-ballooning (PB) modes in tokamak discharges with low-aspect ratio was explored.
Journal ArticleDOI
Magnetic polarization measurements of the multi-modal plasma response to 3D fields in the EAST tokamak
Nikolas Logan,L. Cui,Houyin Wang,Youwen Sun,S. Gu,Guoqiang Li,Raffi Nazikian,Carlos Paz-Soldan +7 more
Journal ArticleDOI
Observation of persistent edge current driven by coaxial helicity Injection
Dennis Mueller,B.A. Nelson,W.T. Hamp,Aaron J. Redd,Thomas Jarboe,R.G. O'Neill,Richard J.H. Smith +6 more
TL;DR: In this paper, the authors present the first results on the use of Coaxial Helicity Injection (CHI) to demonstrate the persistence of edge current drive in a pre-established single null diverted inductive discharge.
Journal ArticleDOI
On the inverse problem for the Grad-Shafranov equation with affine right-hand side
TL;DR: For a given domain ω ⋐ ℝ2 with boundary γ = ∂ω, this paper studied the cardinality of the set of pairs of numbers (a, b) for which there is a function u = u(a,b): ω → τ such that ∇2u(x) = au (x) + b ⩾ 0 for x ∈ ω, u|γ = 0, and ||∇u(s)| − Φ(s) ⩽ η for s ∈ �
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