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I. G. J. Classen
Researcher at Max Planck Society
Publications - 19
Citations - 577
I. G. J. Classen is an academic researcher from Max Planck Society. The author has contributed to research in topics: ASDEX Upgrade & Tokamak. The author has an hindex of 11, co-authored 19 publications receiving 529 citations. Previous affiliations of I. G. J. Classen include European Atomic Energy Community.
Papers
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Journal ArticleDOI
Measurements and modeling of Alfvén eigenmode induced fast ion transport and loss in DIII-D and ASDEX Upgrade
M. A. Van Zeeland,W. W. Heidbrink,R. K. Fisher,M. Garcia Munoz,G. J. Kramer,D. C. Pace,Roscoe White,S. Aekaeslompolo,Max E Austin,J. E. Boom,I. G. J. Classen,S. da Graca,Benedikt Geiger,M.V. Gorelenkova,N. N. Gorelenkov,A.W. Hyatt,Neville C. Luhmann,M. Maraschek,George McKee,R.A. Moyer,Christopher Muscatello,Raffi Nazikian,Hyeon K. Park,S. E. Sharapov,W. Suttrop,G. Tardini,Benjamin Tobias,Y. B. Zhu,Diii-D +28 more
TL;DR: In this article, neutral beam injection into reversed magnetic shear DIII-D and ASDEX upgrade plasmas produces a variety of Alfvenic activity including toroidicity-induced Alfven eigenmodes (RSAEs) and reversed shear Alfven (RSE) during discharge current ramp phase when incomplete current penetration results in a high central safety factor and increased drive due to multiple higher order resonances.
Journal ArticleDOI
Energetic particle instabilities in fusion plasmas
S. E. Sharapov,B. Alper,H. L. Berk,D. N. Borba,Boris Breizman,C. Challis,I. G. J. Classen,E.M. Edlund,Jacob Eriksson,Ambrogio Fasoli,Eric Fredrickson,Guoyong Fu,M. Garcia-Munoz,T. Gassner,K. Ghantous,V. Goloborod'ko,Nikolai Gorelenkov,Mikhail Gryaznevich,S. Hacquin,W. W. Heidbrink,C. Hellesen,Vasily Kiptily,G. J. Kramer,Ph. Lauber,Matthew Lilley,Mietek Lisak,F. Nabais,Raffi Nazikian,Robert Nyqvist,Masaki Osakabe,C. Perez von Thun,S. D. Pinches,Mario Podesta,Miklos Porkolab,Kouji Shinohara,K. Schoepf,Yasushi Todo,Kazuo Toi,M. A. Van Zeeland,I. Voitsekhovich,Roscoe White,V.A. Yavorskij,Itpa Ep Tg,Jet-Efda Contributors +43 more
TL;DR: In this article, the authors present an overview of the diagnostics of energetic particle instabilities and modelling tools developed world-wide, and discuss progress in interpreting the observed phenomena, giving information on the performance of both diagnostics and modeling tools for different plasma conditions.
Journal ArticleDOI
Identification and analysis of transport domains in the stochastic boundary of TEXTOR-DED for different mode spectra
Oliver Schmitz,M. W. Jakubowski,H. Frerichs,D. Harting,Michael Lehnen,B. Unterberg,Sadrilla S. Abdullaev,S. Brezinsek,I. G. J. Classen,T. E. Evans,Y. Feng,K.H. Finken,M. Kantor,Detlev Reiter,U. Samm,B. Schweer,Gennady Sergienko,G. W. Spakman,M. Z. Tokar,E. Uzgel,R. C. Wolf,Textor Team +21 more
TL;DR: In this paper, an external resonant magnetic perturbation is applied with the dynamic ergodic divertor to control the edge transport properties at the TEXTOR tokamak.
Journal ArticleDOI
Convective and diffusive energetic particle losses induced by shear Alfvén waves in the ASDEX upgrade tokamak.
M. Garcia-Munoz,N. Hicks,R. van Voornveld,I. G. J. Classen,R. Bilato,V. Bobkov,M. Bruedgam,H.-U. Fahrbach,V. Igochine,S. Jaemsae,M. Maraschek,K. Sassenberg +11 more
TL;DR: In this article, phase-space characterization of convective and diffusive energetic particle losses induced by shear Alfven waves in a magnetically confined fusion plasma is presented, where a single toroidal Alfven eigenmodes (TAE) and Alfven cascades (AC) eject resonant fast ions in a convective process, leading to a large fast ion diffusion and loss.
Journal ArticleDOI
Fast-ion transport induced by Alfven eigenmodes in the ASDEX Upgrade tokamak
M. Garcia-Munoz,I. G. J. Classen,Benedikt Geiger,W. W. Heidbrink,M. A. Van Zeeland,Simppa Äkäslompolo,R. Bilato,V. Bobkov,Marco Brambilla,S. da Graca,V. Igochine,Ph. Lauber,Neville C. Luhmann,M. Maraschek,F. Meo,Hyeon K. Park,M. Schneller,G. Tardini +17 more
TL;DR: In this article, a comprehensive suite of diagnostics has allowed detailed measurements of the Alfven eigenmode (AE) spatial structure and subsequent fast-ion transport in the ASDEX upgrade (AUG) tokamak.