Journal ArticleDOI
Disruptions in tokamaks
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The cause and dynamics of disruptions will be described for the many different scenarios that these violent events can follow andibilities will be discussed to avoid or at least to ameliorate the damaging effects of disruptions.Abstract:
Disruptions and related vertical displacement events pose a major problem to the design and operation of future tokamak reactors. The cause and dynamics of disruptions will be described for the many different scenarios that these violent events can follow. Possibilities will be discussed to avoid or at least to ameliorate the damaging effects of disruptions.read more
Citations
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Journal ArticleDOI
Chapter 3: MHD stability, operational limits and disruptions
T. C. Hender,J.C. Wesley,J.M. Bialek,Anders Bondeson,Allen H. Boozer,R.J. Buttery,Am Garofalo,Timothy Goodman,Robert Granetz,Y. Gribov,O. Gruber,Mikhail Gryaznevich,G. Giruzzi,Sibylle Günter,Nobuhiko Hayashi,Per Helander,Chris Hegna,D. F. Howell,D.A. Humphreys,G. T. A. Huysmans,A.W. Hyatt,Akihiko Isayama,Stephen Jardin,Yasunori Kawano,A. Kellman,C.E. Kessel,H. R. Koslowski,R. J. La Haye,E. Lazzaro,Yueqiang Liu,V.E. Lukash,J. Manickam,S. Medvedev,V. Mertens,S. V. Mirnov,Y. Nakamura,G.A. Navratil,M. Okabayashi,Takahisa Ozeki,Roberto Paccagnella,G. Pautasso,F. Porcelli,V. D. Pustovitov,V. Riccardo,M. Sato,Olivier Sauter,M.J. Schaffer,Michiya Shimada,Piergiorgio Sonato,E. J. Strait,M. Sugihara,Manabu Takechi,A. D. Turnbull,E. Westerhof,D.G. Whyte,R. Yoshino,H. Zohm +56 more
TL;DR: A review of recent advances in the area of MHD stability and disruptions, since the publication of the 1999 ITER Physics Basis document (1999 Nucl. Fusion 39 2137-2664), is reviewed in this paper.
Journal ArticleDOI
Chapter 1: Overview and summary
TL;DR: The ITER Physics Basis as mentioned in this paper presents and evaluates the physics rules and methodologies for plasma performance projections, which provide the basis for the design of a tokamak burning plasma device whose goal is to demonstrate the scientific and technological feasibility of fusion energy for peaceful purposes.
Journal ArticleDOI
Density limits in toroidal plasmas
TL;DR: In addition to the operational limits imposed by MHD stability on plasma current and pressure, an independent limit on plasma density is observed in confined toroidal plasmas as mentioned in this paper, where all toroidal confinement devices considered operate in similar ranges of (suitably normalized) densities.
Journal ArticleDOI
Predicting disruptive instabilities in controlled fusion plasmas through deep learning
Julian Kates-Harbeck,Julian Kates-Harbeck,Alexey Svyatkovskiy,Alexey Svyatkovskiy,William Tang,William Tang +5 more
TL;DR: Using data from plasma-based tokamak nuclear reactors in the US and Europe, a machine-learning approach based on deep neural networks is taught to forecast disruptions, even those in machines on which the algorithm was not trained.
References
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Journal ArticleDOI
Relaxation and magnetic reconnection in plasmas
TL;DR: The theory of plasma relaxation is described and developed in this article, which involves reconnection of magnetic field lines in a manner that destroys all the topological invariants of ideal plasma so that only total magnetic helicity survives.
Journal ArticleDOI
A new look at density limits in tokamaks
TL;DR: In this article, it is shown that this limit may be caused by a dramatic deterioration in core particle confinement occurring as the density limit boundary is approached, which can help explain the disruptions and Marfes that are associated with density limit.
Journal ArticleDOI
Disruptions in JET
J.A. Wesson,R. D. Gill,M. Hugon,F. C. Schüller,Joseph Snipes,D.J. Ward,D.V. Bartlett,David Campbell,P. A. Duperrex,A.W. Edwards,Robert Granetz,N. Gottardi,T. C. Hender,E. Lazzaro,P. J. Lomas,N.J. Lopes Cardozo,K. F. Mast,M. F. F. Nave,Neil A. Salmon,P. Smeulders,P.R. Thomas,B.J.D. Tubbing,M.F. Turner,A. Weller +23 more
TL;DR: In this paper, the authors describe a two-stage MHD instability, where the first stage is caused by a loss of energy from the central region and the second stage is due to an increase in impurity radiation.
Journal ArticleDOI
The interaction of resonant magnetic perturbations with rotating plasmas
Richard Fitzpatrick,T. C. Hender +1 more
TL;DR: In this paper, the penetration of a helical magnetic perturbation into a rotating tokamak plasma is investigated and it is shown that unless the frequency of the imposed perturbations matches closely to one of the natural mode frequencies, reconnection at the rational surface is suppressed by a large factor.
Journal ArticleDOI
Generation and loss of runaway electrons following disruptions in JET
TL;DR: In this article, a detailed analysis of the generation and loss of runaway electrons following density limit disruptions in the JET tokamak with carbon limited discharges is presented, and it is shown that control of the current channel is important in preventing damaging interactions between the runaways and the vessel walls.
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