D
D. F. Howell
Researcher at European Atomic Energy Community
Publications - 74
Citations - 4265
D. F. Howell is an academic researcher from European Atomic Energy Community. The author has contributed to research in topics: Jet (fluid) & Tokamak. The author has an hindex of 34, co-authored 74 publications receiving 3951 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
Active Control of Type-I Edge-Localized Modes with n=1 Perturbation Fields in the JET Tokamak
Yunfeng Liang,H. R. Koslowski,P.R. Thomas,Eric Nardon,B. Alper,Philip Andrew,Y. Andrew,G. Arnoux,Y. Baranov,M. Becoulet,M. Beurskens,T. M. Biewer,M. Bigi,Kristel Crombé,E. de la Luna,P. de Vries,W. Fundamenski,S.N. Gerasimov,C. Giroud,Mikhail Gryaznevich,N. C. Hawkes,S. Hotchin,D. F. Howell,S. Jachmich,V. G. Kiptily,L. Moreira,V.V. Parail,S. D. Pinches,Elisabeth Rachlew,O. Zimmermann +29 more
TL;DR: Type-I edge-localized modes have been mitigated at the JET tokamak using a static external n=1 perturbation field generated by four error field correction coils located far from the plasma.
Journal ArticleDOI
Control of Neoclassical Tearing modes by sawtooth control
Olivier Sauter,E. Westerhof,M.-L. Mayoral,B. Alper,P. Belo,R.J. Buttery,A. Gondhalekar,Torbjörn Hellsten,T. C. Hender,D. F. Howell,Thomas Johnson,P. U. Lamalle,M. J. Mantsinen,F. Milani,M. F. F. Nave,F. Nguyen,A. L. Pecquet,S. D. Pinches,S. Podda,Juergen Rapp +19 more
TL;DR: It is shown in the Joint European Torus that NTMs can be readily destabilized by long-period sawteeth, such as obtained by sawtooth stabilization from ion-cyclotron heating or current drive, which has important implications for burning plasma scenarios, as alpha particles strongly stabilize the saweeth.
Journal ArticleDOI
Internal transport barrier triggering by rational magnetic flux surfaces in tokamaks
E. Joffrin,C. D. Challis,Garrard Conway,Xavier Garbet,A. Gude,Sibylle Günter,N. C. Hawkes,T. C. Hender,D. F. Howell,G. T. A. Huysmans,E. Lazzaro,Patrick Maget,M. Marachek,A. G. Peeters,S. D. Pinches,S. E. Sharapov,Jet Efda contributors +16 more
TL;DR: The role of rational q surfaces in ITB triggering stresses the importance of q profile control for an advanced tokamak scenario and could assist in substantially lowering the access power to these scenarios in next step facilities as mentioned in this paper.
Journal ArticleDOI
Nonaxisymmetric field effects on Alcator C-Moda)
S.M. Wolfe,Ian H. Hutchinson,Robert Granetz,J. E. Rice,A.E. Hubbard,Alan Lynn,P. E. Phillips,T. C. Hender,D. F. Howell,R.J. La Haye,J. T. Scoville +10 more
TL;DR: In this paper, a set of external coils (A-coils) capable of producing nonaxisymmetric, predominantly n=1, fields with different toroidal phase and a range of poloidal mode m spectra has been used to determine the threshold amplitude for mode locking in Alcator C-Mod.