Overview of ASDEX Upgrade results

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

doi:10.1088/0029-5515/51/9/094012

Cited by 28 publications

(19 citation statements)

References 46 publications

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“…In previous publications [5,6], we have used a retarding field analyzer (RFA) technique to investigate the ion transport by ELM and L-mode turbulent filaments in the SOL of the divertor tokamak ASDEX Upgrade (AUG) [7]. These previous publications are complemented by the present paper which shows first results on intermittent ion transport during inter-ELM periods in the far SOL of AUG, obtained from an RFA.…”

Section: Introductionmentioning

confidence: 83%

Inter‐ELM Ion Transport in the ASDEX Upgrade Far Scrape‐Off Layer

Kočan

Allan

Carpentier-Chouchana

et al. 2013

Contrib. Plasma Phys.

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New measurements of ion transport in the scrape-off layer (SOL) during inter-ELM periods are obtained from a retarding field analyzer (RFA) in the ASDEX Upgrade tokamak. The ion current density measured in the far SOL features large-amplitude bursts associated with turbulent plasma filaments passing the RFA. These filaments convect plasma to the wall with larger density than the background plasma density. The ions in the filament also have higher impact energies than the background ion impact energies. These observations indicate that a filament-wall interaction can lead to erosion of the first wall in the burning plasma tokamaks such as ITER.

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Section: Introductionmentioning

confidence: 83%

Inter‐ELM Ion Transport in the ASDEX Upgrade Far Scrape‐Off Layer

Kočan

Allan

Carpentier-Chouchana

et al. 2013

Contrib. Plasma Phys.

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“…AUG is a medium sized divertor tokamak with major and minor radii of R = 1.65 m and a = 0.5 m, respectively. It is operated with full tungsten coated walls [26]. Fig.…”

Section: Methodsmentioning

confidence: 99%

An experimental investigation of the high density transition of the scrape-off layer transport in ASDEX Upgrade

et al. 2014

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Abstract. A multidiagnostic approach, utilizing Langmuir probes in the midplane, X-point and divertor walls, along with Lithium beam and infrared measurements is employed to evaluate the evolution of the Scrape-off Layer (SOL) of ASDEX Upgrade across the L-mode density transition leading to the formation of a density shoulder. The flattening of the SOL density profiles is linked to a regime change of filaments, which become faster and larger, and to a similar flattening of the q profile. This transition is related to the beginning of outer divertor detachment and leads to the onset of a velocity shear layer in the SOL. Experimental measurements are in good agreement with several filament models which describe the process as a transition from conduction to convection-dominated SOL perpendicular transport caused by an increase of parallel collisionality. These results could be of great relevance since both ITER and DEMO will feature detached divertors and densities largely over the transition values, and might therefore exhibit convective transport levels different to those observed typically in present-day devices.

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“…In particular, one can note that the Greenwald fraction is between 60% to70%, which is coherent with the fraction at which metallic wall machines such as JET-ILW [64] and ASDEX Upgrade [65] routinely operate. The pedestal density is at most 5 × 10 19 m −3 which should be compatible with LH wave accessibility discussed in section 3.…”

Section: Integrated Standard Scenariosmentioning

confidence: 72%

“…In metallic machines, in H-mode, the operation at low densities is more limited than in C wall machines. Indeed, JET-ILW [64] and ASDEX Upgrade with the full W coverage [15,65] both operate in a n ped /n gw range, from 40% to 80%. In WEST, for I p = 0.6-0.8 MA, the Greenwald density, n gw , ranges from 10 to 12 × 10 19 m −3 .…”

Section: Expected Density Profilesmentioning

confidence: 99%

WEST Physics Basis

et al. 2015

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56 075020) is used to pave the way towards ITER divertor procurement and operation. It consists in implementing a divertor configuration and installing ITER-like actively cooled tungsten monoblocks in the Tore Supra tokamak, taking full benefit of its unique long-pulse capability. WEST is a user facility platform, open to all ITER partners. This paper describes the physics basis of WEST: the estimated heat flux on the divertor target, the planned heating schemes, the expected behaviour of the L-H threshold and of the pedestal and the potential W sources. A series of operating scenarios has been modelled, showing that ITER-relevant heat fluxes on the divertor can be achieved in WEST long pulse H-mode plasmas.

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Overview of ASDEX Upgrade results

Abstract: 1 See appendix. 2 See the author list of 'Overview of progress in European Medium Sized Tokamaks towards an integrated plasma-edge/wall solution' by Meyer [22].

Cited by 28 publications

References 46 publications

Inter‐ELM Ion Transport in the ASDEX Upgrade Far Scrape‐Off Layer

Inter‐ELM Ion Transport in the ASDEX Upgrade Far Scrape‐Off Layer

An experimental investigation of the high density transition of the scrape-off layer transport in ASDEX Upgrade

WEST Physics Basis

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