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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Journal ArticleDOI
Simulations on W impurity transport in the edge of EAST H-mode plasmas
Fuqiong Wang,Fuqiong Wang,X J Zha,X J Zha,Yanmin Duan,Songtao Mao,L. Wang,F. C. Zhong,F. C. Zhong,Y. Liang,Y. Liang,L. Li,L. Li,H W Lu,H W Lu,L.Q. Hu,Y P Chen,Z D Yang +17 more
TL;DR: In this paper, the authors investigated the production/transport properties of W impurity in the edge of experimental advanced superconducting tokamak (EAST) H-mode discharges with upper-single-null configurations by using DIVIMP Monte-Carlo code.
Journal ArticleDOI
Spheromak Experiment Using Separate Guns For Formation And Sustainment
Michael R. Brown,Adam Martin +1 more
TL;DR: In this article, the use of separate magnetized plasma guns for the formation and sustainment of a spheromak is described, and it is shown that energy coupling efficiency approaches unity if the guns and spheroms are of comparable size.
Journal ArticleDOI
Plasma current profile reconstruction for EAST based on Bayesian inference
Zijie Liu,Zijie Liu,Zhengping Luo,Tianbo Wang,Yao Huang,Y.M. Wang,Qingze Yu,Q. Yuan,Bingjia Xiao,Bingjia Xiao,Jiangang Li,Jiangang Li +11 more
TL;DR: A novel reconstruction code based on Bayesian inference is developed to infer the plasma current distribution for experiment analysis of EAST, and its potential for application in future real-time plasma feedback control is indicated.
Journal ArticleDOI
Pedestal fueling simulations with a coupled kinetic plasma–kinetic neutral transport code
TL;DR: In this paper, the Monte Carlo neutral transport code DEGAS2 was proposed to provide a more realistic treatment of neutral atoms in the tokamak edge plasma and allow detailed atomic physics and plasma-material interaction processes to be incorporated into the simulations.
Journal ArticleDOI
Balancing current drive and heating in DIII-D high noninductive current fraction discharges through choice of the toroidal field
J.R. Ferron,C. T. Holcomb,T.C. Luce,P. A. Politzer,Francesca Turco,J.C. DeBoo,E. J. Doyle,Yongkyoon In,R.J. La Haye,M. Murakami,M. Okabayashi,Jin Myung Park,T.W. Petrie,C.C. Petty,H. Reimerdes +14 more
TL;DR: In this article, the toroidal field strength (BT) adjustment was used to obtain a balance between the required current drive and heating powers with other easily modifiable discharge parameters (βN, q95, discharge shape, ne) at values chosen to satisfy specific constraints.
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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