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1. EUROfusion Integrated Modelling (EU-IM) Capabilities and Selected Physics Applications

Author

Falchetto G.L., M.I. Airila, A. Alberto Morillas, E. Andersson Sundén, T. Aniel, J.-F. Artaud, O. Asunta, C.V. Atanasiu, M. Baelmans, V. Basiuk, R. Bilato, M. Blommaert, D. Borodin, C. Boulbe, S. Briguglio, J. Citrin, R. Coelho, S. Conroy, D. Coster, V. Doriæ, R. Dumont, E. Fable, B. Faugeras, J. Ferreira, L. Figini, A. Figueiredo, G. Fogaccia, C. Fuchs, E. Giovannozzi, V. Goloborod'ko, O. Hoenen, Ph. Huynh, F. Imbeaux, I. Ivanova-Stanik, T. Johnson, D. Kalupin, L. Kos, E. Lerche, J. Madsen, O. Maj, G. Manduchi, M. Mantsinen, Y. Marandet, S. Matejcik, R. Mayo-Garcia, P.J. McCarthy, A. Merle, E. Nardon, A.H. Nielsen, S. Nowak, M. O'Mullane, M. Owsiak, V. Pais, B. Palak, G. Pelka, M. Plociennik, G.I. Pokol, D. Poljak, H. Radhakrishnan, H. Reimerdes, D. Reiser, J. Romazanov, P. Rodrigues, X. Saez, D. Samaddar, O. Sauter, K. Schmid, B.D. Scott, S. ?esni?, J. Signoret, S.K. Sipilä, R. Stankiewicz, P. Strand, E. Suchkov, A. Susnjara, G. Szepesi, D. Tegnered, K. Tokési, D. Tskhakaya, J. Urban, P. Vallejos, D. Van Eester, L. Villard, F. Villone, B. Viola, G. Vlad, E. Westerhof, D. Yadykin, R. Zagorski, F. Zaitsev, T. Zok, W. Zwingmann, S. Äkäslompolo, the ASDEX Upgrade Team, and the EUROfusion-IM Team more...

Subjects
Physics Applications, EUROfusion Integrated Modelling, EU-IM
Abstract

Recent developments and achievements of the EUROfusion Code Development for Integrated Modelling project (WPCD), which aim is to provide a validated integrated modelling suite for the simulation and prediction of complete plasma discharges in any tokamak, are presented. WPCD develops generic complex integrated simulations, workflows, for physics applications, using the standardized European Integrated Modelling (EU-IM) framework. Selected physics applications of EU-IM workflows are illustrated in this paper. more...

Published
2016

2. Overview of ASDEX Upgrade results

Author

A. Kallenbach, J. Adamek, L. Aho-Mantila, S. Äkäslompolo, C. Angioni, C.V. Atanasiu, M. Balden, K. Behler, E. Belonohy, A. Bergmann, M. Bernert, R. Bilato, V. Bobkov, J. Boom, A. Bottino, F. Braun, M. Brüdgam, A. Buhler, A. Burckhart, A. Chankin, I.G.J. Classen, G.D. Conway, D.P. Coster, P. de Marné, R. D'Inca, R. Drube, R. Dux, T. Eich, N. Endstrasser, K. Engelhardt, B. Esposito, E. Fable, H.-U. Fahrbach, L. Fattorini, R. Fischer, A. Flaws, H. Fünfgelder, J.C. Fuchs, K. Gál, M. García Muñoz, B. Geiger, M. Gemisic Adamov, L. Giannone, C. Giroud, T. Görler, S. da Graca, H. Greuner, O. Gruber, A. Gude, S. Günter, G. Haas, A.H. Hakola, D. Hangan, T. Happel, T. Hauff, B. Heinemann, A. Herrmann, N. Hicks, J. Hobirk, H. Höhnle, M. Hölzl, C. Hopf, L. Horton, M. Huart, V. Igochine, C. Ionita, A. Janzer, F. Jenko, C.-P. Käsemann, S. Kálvin, O. Kardaun, M. Kaufmann, A. Kirk, H.-J. Klingshirn, M. Kocan, G. Kocsis, H. Kollotzek, C. Konz, R. Koslowski, K. Krieger, T. Kurki-Suonio, B. Kurzan, K. Lackner, P.T. Lang, P. Lauber, M. Laux, F. Leipold, F. Leuterer, A. Lohs, N.C. Luhmann, T. Lunt, A. Lyssoivan, H. Maier, C. Maggi, K. Mank, M.-E. Manso, M. Maraschek, P. Martin, M. Mayer, P.J. McCarthy, R. McDermott, H. Meister, L. Menchero, F. Meo, P. Merkel, R. Merkel, V. Mertens, F. Merz, A. Mlynek, F. Monaco, H.W. Müller, M. Münich, H. Murmann, G. Neu, R. Neu, B. Nold, J.-M. Noterdaeme, H.K. Park, G. Pautasso, G. Pereverzev, Y. Podoba, F. Pompon, E. Poli, K. Polochiy, S. Potzel, M. Prechtl, M.J. Püschel, T. Pütterich, S.K. Rathgeber, G. Raupp, M. Reich, B. Reiter, T. Ribeiro, R. Riedl, V. Rohde, J. Roth, M. Rott, F. Ryter, W. Sandmann, J. Santos, K. Sassenberg, P. Sauter, A. Scarabosio, G. Schall, K. Schmid, P.A. Schneider, W. Schneider, G. Schramm, R. Schrittwieser, J. Schweinzer, B. Scott, M. Sempf, F. Serra, M. Sertoli, M. Siccinio, A. Sigalov, A. Silva, A.C.C. Sips, F. Sommer, A. Stäbler, J. Stober, B. Streibl, E. Strumberger, K. Sugiyama, W. Suttrop, T. Szepesi, G. Tardini, C. Tichmann, D. Told, W. Treutterer, L. Urso, P. Varela, J. Vincente, N. Vianello, T. Vierle, E. Viezzer, C. Vorpahl, D. Wagner, A. Weller, R. Wenninger, B. Wieland, C. Wigger, M. Willensdorfer, M. Wischmeier, E. Wolfrum, E. Würsching, D. Yadikin, Q. Yu, I. Zammuto, D. Zasche, T. Zehetbauer, Y. Zhang, M. Zilker, H. Zohm, and Science and Technology of Nuclear Fusion more...

Subjects
PHYSICS, Nuclear and High Energy Physics, 0103 physical sciences, TOKAMAK, 010306 general physics, Condensed Matter Physics, 7. Clean energy, 01 natural sciences, 010305 fluids & plasmas, REFLECTOMETRY
Abstract

The ASDEX Upgrade programme is directed towards physics input to critical elements of the ITER design and the preparation of ITER operation, as well as addressing physics issues for a future DEMO design. After the finalization of the tungsten coating of the plasma facing components, the re-availability of all flywheel-generators allowed high-power operation with up to 20 MW heating power at I p up to 1.2 MA. Implementation of alternative ECRH schemes (140 GHz O2- and X3-mode) facilitated central heating above n e = 1.2 × 1020 m−3 and low q 95 operation at B t = 1.8 T. Central O2-mode heating was successfully used in high P/R discharges with 20 MW total heating power and divertor load control with nitrogen seeding. Improved energy confinement is obtained with nitrogen seeding both for type-I and type-III ELMy conditions. The main contributor is increased plasma temperature, no significant changes in the density profile have been observed. This behaviour may be explained by higher pedestal temperatures caused by ion dilution in combination with a pressure limited pedestal and hollow nitrogen profiles. Core particle transport simulations with gyrokinetic calculations have been benchmarked by dedicated discharges using variations of the ECRH deposition location. The reaction of normalized electron density gradients to variations of temperature gradients and the T e/T i ratio could be well reproduced. Doppler reflectometry studies at the L–H transition allowed the disentanglement of the interplay between the oscillatory geodesic acoustic modes, turbulent fluctuations and the mean equilibrium E × B flow in the edge negative E r well region just inside the separatrix. Improved pedestal diagnostics revealed also a refined picture of the pedestal transport in the fully developed H-mode type-I ELM cycle. Impurity ion transport turned out to be neoclassical in between ELMs. Electron and energy transport remain anomalous, but exhibit different recovery time scales after an ELM. After recovery of the pre-ELM profiles, strong fluctuations develop in the gradients of n e and T e. The occurrence of the next ELM cannot be explained by the local current diffusion time scale, since this turns out to be too short. Fast ion losses induced by shear Alfvén eigenmodes have been investigated by time-resolved energy and pitch angle measurements. This allowed the separation of the convective and diffusive loss mechanisms. more...

Published
2011
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3. Description of the magnetohydrodynamic equilibrium in iron core transformer tokamaks

Author

L.E. Zakharov and C.V. Atanasiu

Subjects
Physics, Nuclear and High Energy Physics, Tokamak, Plasma, Mechanics, Condensed Matter Physics, law.invention, Magnetic field, Boundary integral equations, Classical mechanics, Magnetic core, Physics::Plasma Physics, law, Magnetohydrodynamic drive, Transformer
Abstract

The paper presents a method to describe the evolution of the plasma equilibrium in an iron core transformer tokamak. It is shown that for any possible discharge scenario for a circular cross-section plasma, full information on the poloidal magnetic field system is contained in a set of two-dimensional characteristics. Using a boundary integral equations method, a large number of equilibrium states have been computed to obtain the necessary two-dimensional characteristics for describing discharge scenarios in the T-15 tokamak. more...

Published
1990
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