Progress from ASDEX Upgrade experiments in preparing the physics basis of ITER operation and DEMO scenario development
Journal article, 2022
An overview of recent results obtained at the tokamak ASDEX Upgrade (AUG) is given. A work flow for predictive profile modelling of AUG discharges was established which is able to reproduce experimental H-mode plasma profiles based on engineering parameters only. In the plasma center, theoretical predictions on plasma current redistribution by a dynamo effect were confirmed experimentally. For core transport, the stabilizing effect of fast ion distributions on turbulent transport is shown to be important to explain the core isotope effect and improves the description of hollow low-Z impurity profiles. The L-H power threshold of hydrogen plasmas is not affected by small helium admixtures and it increases continuously from the deuterium to the hydrogen level when the hydrogen concentration is raised from 0 to 100%. One focus of recent campaigns was the search for a fusion relevant integrated plasma scenario without large edge localised modes (ELMs). Results from six different ELM-free confinement regimes are compared with respect to reactor relevance: ELM suppression by magnetic perturbation coils could be attributed to toroidally asymmetric turbulent fluctuations in the vicinity of the separatrix. Stable improved confinement mode plasma phases with a detached inner divertor were obtained using a feedback control of the plasma β. The enhanced D α H-mode regime was extended to higher heating power by feedback controlled radiative cooling with argon. The quasi-coherent exhaust regime was developed into an integrated scenario at high heating power and energy confinement, with a detached divertor and without large ELMs. Small ELMs close to the separatrix lead to peeling-ballooning stability and quasi continuous power exhaust. Helium beam density fluctuation measurements confirm that transport close to the separatrix is important to achieve the different ELM-free regimes. Based on separatrix plasma parameters and interchange-drift-Alfvén turbulence, an analytic model was derived that reproduces the experimentally found important operational boundaries of the density limit and between L- and H-mode confinement. Feedback control for the X-point radiator (XPR) position was established as an important element for divertor detachment control. Stable and detached ELM-free phases with H-mode confinement quality were obtained when the XPR was moved 10 cm above the X-point. Investigations of the plasma in the future flexible snow-flake divertor of AUG by means of first SOLPS-ITER simulations with drifts activated predict beneficial detachment properties and the activation of an additional strike point by the drifts.
Asdex Upgrade
ELLM-free discharges
confinement
Author
U. Stroth
Max Planck Society
D. Aguiam
Instituto Superior Tecnico
E. Alessi
Istituto Di Fisica Del Plasma Piero Caldirola, Milan
C. Angioni
Max Planck Society
N. Arden
Max Planck Society
R. Arredondo Parra
Max Planck Society
V. Artigues
Max Planck Society
O. Asunta
Aalto University
M. Balden
Max Planck Society
V. Bandaru
Max Planck Society
A. Banon-Navarro
Max Planck Society
K. Behler
Max Planck Society
A. Bergmann
Max Planck Society
M. Bergmann
Max Planck Society
J. Bernardo
Instituto Superior Tecnico
M. Bernert
Max Planck Society
A. Biancalani
Max Planck Society
R. Bielajew
Massachusetts Institute of Technology (MIT)
R. Bilato
Max Planck Society
G. Birkenmeier
Max Planck Society
T.C. Blanken
Eindhoven University of Technology
V. Bobkov
Max Planck Society
A. Bock
Max Planck Society
T. Body
Max Planck Society
T. Bolzonella
Consorzio Rfx
N. Bonanomi
Max Planck Society
A. Bortolon
Princeton University
B. Böswirth
Max Planck Society
C. Bottereau
The French Alternative Energies and Atomic Energy Commission (CEA)
A. Bottino
Max Planck Society
H. Van Den Brand
Eindhoven University of Technology
M. Brenzke
Forschungszentrum Jülich
S. Brezinsek
Forschungszentrum Jülich
D. Brida
Max Planck Society
F. Brochard
University of Lorraine
C. Bruhn
Max Planck Society
J. Buchanan
Culham Science Centre
A. Buhler
Max Planck Society
A. Burckhart
Max Planck Society
Y. Camenen
Aix Marseille University
B. Cannas
University of Cagliari
P. Cano Megias
University of Seville
D. Carlton
Instytut Problemow Jadrowyc
M. Carr
Culham Science Centre
P. Carvalho
Instituto Superior Tecnico
C. Castaldo
ENEA
M. Cavedon
Max Planck Society
C. Cazzaniga
Consorzio Rfx
C. Challis
Culham Science Centre
A. V. Chankin
Max Planck Society
C. Cianfarani
ENEA
F. Clairet
The French Alternative Energies and Atomic Energy Commission (CEA)
S. Coda
Swiss Federal Institute of Technology in Lausanne (EPFL)
R. Coelho
Instituto Superior Tecnico
J.W. Coenen
Forschungszentrum Jülich
L. Colas
The French Alternative Energies and Atomic Energy Commission (CEA)
G.D. Conway
Max Planck Society
S. Costea
University of Innsbruck
D. Coster
Max Planck Society
T.B. Cote
University of Wisconsin Madison
A. Creely
Massachusetts Institute of Technology (MIT)
G. Croci
Istituto Di Fisica Del Plasma Piero Caldirola, Milan
D.J. Cruz Zabala
University of Seville
G. Cseh
Hungarian Academy of Sciences
A. Czarnecka
Instytut Problemow Jadrowyc
I. Cziegler
University of York
O. D'Arcangelo
ENEA Consorzio CREATE
A. Dal Molin
University of Milano-Bicocca
P. David
Max Planck Society
C. Day
Karlsruhe Institute of Technology (KIT)
M. De Baar
Eindhoven University of Technology
P. De Marné
Max Planck Society
R. Delogu
Consorzio Rfx
S.S. Denk
Max Planck Society
P. Denner
Forschungszentrum Jülich
A. Di Siena
The University of Texas at Austin
J.J. Dominguez Palacios Durán
University of Seville
Dániel Dunai
The French Alternative Energies and Atomic Energy Commission (CEA)
A. Drenik
Max Planck Society
M. Dreval
Culham Science Centre
R. Drube
Max Planck Society
M. Dunne
Max Planck Society
B. Duval
Swiss Federal Institute of Technology in Lausanne (EPFL)
R. Dux
Max Planck Society
T. Eich
Max Planck Society
S. Elgeti
Max Planck Society
A. Encheva
ITER Organization
K. Engelhardt
Max Planck Society
Boglarka Erdos
Hungarian Academy of Sciences
I. Erofeev
Max Planck Society
B. Esposito
ENEA
E. Fable
Max Planck Society
M. Faitsch
Max Planck Society
U. Fantz
Max Planck Society
M. Farnik
Czech Academy of Sciences
H. Faugel
Instytut Problemow Jadrowyc
F Felici
Swiss Federal Institute of Technology in Lausanne (EPFL)
O. Ficker
Czech Academy of Sciences
S. Fietz
Max Planck Society
A. Figueredo
Instituto Superior Tecnico
R. Fischer
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O. Ford
Max Planck Society
L. Frassinetti
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M. Fröschle
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G. Fuchert
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J.C. Fuchs
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H. Fünfgelder
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S. Futatani
Centro Nacional de Supercomputacion
K. Galazka
Instytut Problemow Jadrowyc
J. Galdon-Quiroga
Max Planck Society
D. Gallart Escolà
Centro Nacional de Supercomputacion
A. Gallo
The French Alternative Energies and Atomic Energy Commission (CEA)
Y. Gao
Forschungszentrum Jülich
S. Garavaglia
Istituto Di Fisica Del Plasma Piero Caldirola, Milan
M. Garcia Muñoz
University of Seville
B. Geiger
University of Wisconsin Madison
L. Giannone
Max Planck Society
S. Gibson
Durham University
L. Gil
Instituto Superior Tecnico
E. Giovannozzi
ENEA
S. Glöggler
Max Planck Society
M. Gobbin
Consorzio Rfx
J. Gonzalez Martin
University of Seville
T. Goodman
Swiss Federal Institute of Technology in Lausanne (EPFL)
G. Gorini
University of Milano-Bicocca
T. Görler
Max Planck Society
D. Gradic
Max Planck Society
G. Granucci
Istituto Di Fisica Del Plasma Piero Caldirola, Milan
A. Grater
Max Planck Society
H. Greuner
Max Planck Society
M. Griener
Max Planck Society
M. Groth
Aalto University
A. Gude
Max Planck Society
L. Guimarais
Instituto Superior Tecnico
S. Günter
Max Planck Society
G. Haas
Max Planck Society
A.H. Hakola
Technical Research Centre of Finland (VTT)
C. Ham
Culham Science Centre
T. Happel
Max Planck Society
N. Den Harder
Max Planck Society
G.F. Harrer
Vienna University of Technology
J. Harrison
Culham Science Centre
V. Hauer
Karlsruhe Institute of Technology (KIT)
T. Hayward-Schneider
Max Planck Society
B. Heinemann
Max Planck Society
T. Hellsten
General Atomics
S.S. Henderson
Culham Science Centre
P. Hennequin
École polytechnique
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E. Heyn
Technische Universität Graz
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Technical University of Denmark (DTU)
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University of York
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Massachusetts Institute of Technology (MIT)
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M. Iliasova
Russian Academy of Sciences
T. Ilkei
Hungarian Academy of Sciences
Klara Insulander Björk
Chalmers, Physics, Subatomic, High Energy and Plasma Physics
C. Ionita Schrittwieser
University of Innsbruck
I. Ivanova-Stanik
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W. Jacob
Max Planck Society
N. Jaksic
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F. Janky
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A. Jansen Van Vuuren
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Czech Academy of Sciences
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T. Jensen
Technical University of Denmark (DTU)
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The French Alternative Energies and Atomic Energy Commission (CEA)
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Max Planck Society
S. Kálvin
Hungarian Academy of Sciences
M. Kantor
Eindhoven University of Technology
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Max Planck Society
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Max Planck Society
J. Karhunen
Aalto University
C.-P. Kasemann
Max Planck Society
S. Kasilov
Technische Universität Graz
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Hungarian Academy of Sciences
W. Kernbichler
Vienna University of Technology
E. Khilkevitch
Russian Academy of Sciences
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Culham Science Centre
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Max Planck Society
V. Klevarova
Ghent university
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Hungarian Academy of Sciences
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Czech Academy of Sciences
M. Kong
Culham Science Centre
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Forschungszentrum Jülich
K. Krieger
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Royal Military Academy
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Aalto University
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B. Labit
Swiss Federal Institute of Technology in Lausanne (EPFL)
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Princeton University
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Aalto University
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University of York
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Princeton University
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Eindhoven University of Technology
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Istituto Di Fisica Del Plasma Piero Caldirola, Milan
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Istituto Di Fisica Del Plasma Piero Caldirola, Milan
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Centro Nacional de Supercomputacion
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Max Planck Society
C. Marchetto
Polytechnic University of Turin
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P. Martin
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A. Martitsch
Technische Universität Graz
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University College Cork
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Max Planck Society
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Swiss Federal Institute of Technology in Lausanne (EPFL)
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Max Planck Society
H. Meyer
Culham Science Centre
D. Milanesio
Polytechnic University of Turin
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Massachusetts Institute of Technology (MIT)
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Max Planck Society
M. Muraca
Max Planck Society
F. Nabais
Instituto Superior Tecnico
V Naulin
Technical University of Denmark (DTU)
R. Nazikian
Princeton University
R.D. Nem
Technical University of Denmark (DTU)
A. Nemes-Czopf
Instytut Problemow Jadrowyc
G. Neu
Max Planck Society
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Max Planck Society
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Technical University of Denmark (DTU)
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Technical University of Denmark (DTU)
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Max Planck Society
M. Nocente
University of Milano-Bicocca
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Istituto Di Fisica Del Plasma Piero Caldirola, Milan
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Technical University of Denmark (DTU)
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Max Planck Society
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Aalto University
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General Atomics
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Royal Institute of Technology (KTH)
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University of Stuttgart
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Instituto Superior Tecnico
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Royal Military Academy
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Swiss Federal Institute of Technology in Lausanne (EPFL)
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University of Stuttgart
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Laboratorio Nacional de Fusion
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Royal Institute of Technology (KTH)
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Hungarian Academy of Sciences
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Massachusetts Institute of Technology (MIT)
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Eindhoven University of Technology
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Royal Institute of Technology (KTH)
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Culham Science Centre
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Technical University of Denmark (DTU)
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Aalto University
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University of Seville
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Swiss Federal Institute of Technology in Lausanne (EPFL)
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University of Wisconsin Madison
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University of Innsbruck
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Instituto Superior Tecnico
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Ghent university
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Swiss Federal Institute of Technology in Lausanne (EPFL)
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Culham Science Centre
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Swiss Federal Institute of Technology in Lausanne (EPFL)
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Russian Academy of Sciences
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University of Cagliari
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Culham Science Centre
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Technical Research Centre of Finland (VTT)
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Max Planck Society
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Aalto University
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Laboratorio Nacional de Fusion
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Swiss Federal Institute of Technology in Lausanne (EPFL)
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Istituto Di Fisica Del Plasma Piero Caldirola, Milan
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Technical University of Denmark (DTU)
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Hungarian Academy of Sciences
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Technical Research Centre of Finland (VTT)
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Istituto Di Fisica Del Plasma Piero Caldirola, Milan
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Royal Institute of Technology (KTH)
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Royal Military Academy
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Culham Science Centre
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Instituto Superior Tecnico
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Karlsruhe Institute of Technology (KIT)
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Instituto Superior Tecnico
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Ghent university
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Culham Science Centre
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Massachusetts Institute of Technology (MIT)
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Chinese Academy of Sciences
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Hungarian Academy of Sciences
Nuclear Fusion
0029-5515 (ISSN) 1741-4326 (eISSN)
Vol. 62 4 042006Subject Categories
Energy Engineering
Other Physics Topics
Fusion, Plasma and Space Physics
DOI
10.1088/1741-4326/ac207f