Please use this identifier to cite or link to this item: http://dx.doi.org/10.14279/depositonce-15100
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Main Title: Overview of first Wendelstein 7-X high-performance operation
Author(s): Klinger, T.
Andreeva, T.
Bozhenkov, Sergey
Brandt, C.
Burhenn, R.
Buttenschön, Birger
Fuchert, G.
Geiger, B.
Grulke, O.
Laqua, H.P.
Pablant, N.
Runov, A.
Rust, N.
Ryc, L.
Ryosuke, S.
Sakamoto, R.
Fornal, T.
Salewski, M.
Samartsev, A.
Sanchez, E.
König, R.
Moseev, D.
Behr, W.
Sano, F.
Satake, S.
Schacht, J.
Satheeswaran, G.
Schauer, F.
Scherer, T.
Frerichs, H.
Schilling, J.
Schlaich, A.
Murakami, S.
Äkäslompolo, S.
Schlisio, G.
Schluck, F.
Beidler, C.
Schlüter, K.-H.
Schmitt, J.
Schmitz, H.
Schmitz, O.
Schmuck, S.
Freund, A.
Náfrádi, G.
Schneider, M.
Ehrke, G.
Schneider, W.
Scholz, P.
Schrittwieser, R.
Schröder, M.
Benndorf, A.
Schröder, T.
Schroeder, R.
Schumacher, H.
Nagel, M.
Schweer, B.
Funaba, T.
Kornejew, P.
Scott, E.
Sereda, S.
Shanahan, B.
Sibilia, M.
Sinha, P.
Sipliä, S.
Biedermann, C.
Naujoks, D.
Slaby, C.
Sleczka, M.
Smith, H.
Koschinsky, J.-P.
Galkowski, A.
Spiess, W.
Spong, D.A.
Spring, A.
Stadler, R.
Stejner, M.
Ascasibar, E.
Stephey, L.
Stridde, U.
Biel, W.
Suzuki, C.
Köster, Friedemann
Svensson, J.
Gantenbein, G.
Szabó, V.
Szabolics, T.
Szepesi, T.
Neilson, H.
Szökefalvi-Nagy, Z.
Tancetti, A.
Terry, J.
Thomas, J.
Thumm, M.
Krämer, M.
Blackwell, B.
Travere, J.M.
Stange, T.
Traverso, P.
Neu, R.
Tretter, J.
Trimino Mora, H.
Tsuchiya, H.
Tsujimura, T.
Tulipán, S.
Unterberg, B.
Krampitz, R.
Vakulchyk, I.
Valet, S.
Blanco, E.
Neubauer, O.
Gao, Y.
Vano, L.
van Milligen, B.
van Vuuren, A.J.
Vela, L.
Velasco, J.-L.
Vergote, M.
Krämer-Flecken, A.
Vervier, M.
Vianello, N.
Flom, E.
Viebke, H.
Vilbrandt, R.
García Regaña, J.
Blatzheim, M.
Vorköper, A.
Wadle, S.
Wagner, F.
Wang, E.
Krawczyk, N.
Wang, N.
Knauer, J.
Wang, Z.
Warmer, F.
Wauters, T.
Wegener, L.
Gates, D.
Weggen, J.
Ballinger, S.
Wei, Y.
Weir, G.
Kremeyer, T.
Neuner, U.
Wendorf, J.
Wenzel, U.
Werner, A.
White, A.
Wiegel, B.
Wilde, F.
Geiger, J.
Windisch, T.
Winkler, M.
Bluhm, T.
Ngo, T.
Krom, J.
Winter, A.
Winters, V.
Wolf, S.
Wolf, R.C.
Wright, A.
Wurden, G.
Xanthopoulos, P.
Giannella, V.
Yamada, H.
Nicolai, D.
Yamada, I.
Krychowiak, M.
Yasuhara, R.
Böckenhoff, D.
Yokoyama, M.
Zanini, M.
Zarnstorff, M.
Zeitler, A.
Zhang, D.
Zhang, H.
Nielsen, S.K.
Gogoleva, A.
Zhu, J.
Elgeti, S.
Zilker, M.
Zocco, A.
Zoletnik, S.
Böswirth, B.
Zuin, M.
Böttger, L.-G.
Borchardt, M.
Niemann, H.
Borsuk, V.
Boscary, J.
Goncalves, B.
Alcuson, J.
Bosch, H.-S.
Beurskens, M.
Brakel, R.
Brand, H.
Bräuer, T.
Braune, H.
Nishizawa, T.
Brezinsek, S.
Brunner, K.-J.
Bussiahn, R.
Bykov, V.
Ksiazek, I.
Goriaev, A.
Cai, J.
Calvo, I.
Cannas, B.
Cappa, A.
Nocentini, R.
Carls, A.
Carralero, D.
Carraro, L.
Carvalho, B.
Castejon, F.
Kubkowska, M.
Charl, A.
Gradic, D.
Chaudhary, N.
Chauvin, D.
Bähner, J.P.
Chernyshev, F.
Cianciosa, M.
Citarella, R.
Claps, G.
Coenen, J.
Cole, M.
Kühner, G.
Cole, M.J.
Cordella, F.
Grahl, M.
Nührenberg, C.
Cseh, G.
Czarnecka, A.
Czerski, K.
Czerwinski, M.
Czymek, G.
da Molin, A.
da Silva, A.
Kurki-Suonio, T.
Damm, H.
de la Pena, A.
Nührenberg, J.
Degenkolbe, S.
von Stechow, A.
Dhard, C.P.
Dibon, M.
Dinklage, A.
Dittmar, T.
Drevlak, M.
Drewelow, P.
Kurz, P.A.
Drews, P.
Knaup, M.
Durodie, F.
Edlund, E.
van Eeten, P.
Green, J.
Effenberg, F.
Greuner, H.
Grosman, A.
Grote, H.
Gruca, M.
Kwak, S.
Fernandes, H.
Guerard, C.
Hacker, P.
Han, X.
Harris, J.H.
Hartmann, D.
Tamura, Naoki
Hathiramani, D.
Hein, B.
Heinemann, B.
Helander, P.
Obermayer, S.
Landreman, M.
Henneberg, S.
Henkel, M.
Hernandez Sanchez, J.
Hidalgo, C.
Hirsch, M.
Hollfeld, K.P.
Thomsen, H.
Höfel, U.
Hölting, A.
Offermanns, G.
Höschen, D.
Lang, P.
Houry, M.
Howard, J.
Huang, X.
Huang, Z.
Hubeny, M.
Huber, M.
Hunger, H.
Turkin, Y.
Ogawa, K.
Ida, K.
Ilkei, T.
Lang, R.
Illy, S.
Israeli, B.
Jablonski, S.
Jakubowski, M.
Jelonnek, J.
Jenzsch, H.
Jesche, T.
Ölmanns, J.
Jia, M.
Wegner, Thomas
Junghanns, P.
Endler, M.
Kacmarczyk, J.
Kallmeyer, J.-P.
Kamionka, U.
Kasahara, H.
Kasparek, W.
Kazakov, Y.O.
Ongena, J.
Kenmochi, N.
Killer, C.
Kirschner, A.
Abramovic, I.
Langenberg, A.
Kleiber, R.
Aleynikov, P.
Langish, S.
Laqua, H.
Laube, R.
Oosterbeek, J.W.
Lazerson, S.
Lechte, C.
Lennartz, M.
Leonhardt, W.
Li, C.
Ennis, D.
Li, C.
Li, Y.
Aleynikova, K.
Liang, Y.
Orozco, G.
Linsmeier, C.
Liu, S.
Lobsien, J.-F.
Loesser, D.
Loizu Cisquella, J.
Lore, J.
Esteban, H.
Lorenz, A.
Losert, M.
Lücke, A.
Otte, M.
Ali, A.
Lumsdaine, A.
Lutsenko, V.
Maaßberg, H.
Marchuk, O.
Matthew, J.H.
Marsen, S.
Estrada, T.
Marushchenko, M.
Masuzaki, S.
Baek, S.G.
Maurer, D.
Mayer, M.
Alonso, A.
McCarthy, K.
McNeely, P.
Meier, A.
Mellein, D.
Mendelevitch, B.
Fellinger, J.
Mertens, P.
Knieps, A.
Mikkelsen, D.
Mishchenko, A.
Missal, B.
Mittelstaedt, J.
Anda, G.
Mizuuchi, T.
Mollen, A.
Moncada, V.
Mönnich, T.
Feng, Y.
Pacios Rodriguez, L.
Morisaki, T.
Rahbarnia, K.
Panadero, N.
Panadero Alvarez, N.
Papenfuß, D.
Paqay, S.
Pasch, E.
Pavone, A.
Pawelec, E.
Pedersen, T.S.
Kobarg, T.
Pelka, G.
Balden, M.
Fietz, W.H.
Perseo, V.
Peterson, B.
Pilopp, D.
Pingel, S.
Pisano, F.
Plaum, B.
Plunk, G.
Kocsis, G.
Pölöskei, P.
Porkolab, M.
Proll, J.
Figacz, W.
Baldzuhn, J.
Puiatti, M.-E.
Puig Sitjes, A.
Purps, F.
Rack, M.
Récsei, S.
Köchl, F.
Reiman, A.
Reimold, F.
Reiter, D.
Remppel, F.
Fontdecaba, J.
Renard, S.
Banduch, M.
Riedl, R.
Riemann, J.
Risse, K.
Kolesnichenko, Y.
Rohde, V.
Röhlinger, H.
Romé, M.
Rondeshagen, D.
Rong, P.
Ford, O.
Roth, B.
Rudischhauser, L.
Barbui, T.
Rummel, K.
Könies, A.
Rummel, T.
Type: Article
URI: https://depositonce.tu-berlin.de/handle/11303/16325
http://dx.doi.org/10.14279/depositonce-15100
License: https://creativecommons.org/licenses/by/3.0/
Abstract: The optimized superconducting stellarator device Wendelstein 7-X (with major radius , minor radius , and plasma volume) restarted operation after the assembly of a graphite heat shield and 10 inertially cooled island divertor modules. This paper reports on the results from the first high-performance plasma operation. Glow discharge conditioning and ECRH conditioning discharges in helium turned out to be important for density and edge radiation control. Plasma densities of with central electron temperatures were routinely achieved with hydrogen gas fueling, frequently terminated by a radiative collapse. In a first stage, plasma densities up to were reached with hydrogen pellet injection and helium gas fueling. Here, the ions are indirectly heated, and at a central density of a temperature of with was transiently accomplished, which corresponds to with a peak diamagnetic energy of and volume-averaged normalized plasma pressure . The routine access to high plasma densities was opened with boronization of the first wall. After boronization, the oxygen impurity content was reduced by a factor of 10, the carbon impurity content by a factor of 5. The reduced (edge) plasma radiation level gives routinely access to higher densities without radiation collapse, e.g. well above line integrated density and central temperatures at moderate ECRH power. Both X2 and O2 mode ECRH schemes were successfully applied. Core turbulence was measured with a phase contrast imaging diagnostic and suppression of turbulence during pellet injection was observed.
Subject(s): stellarator
divertor
ECR heating
NBI heating
plasma performance
turbulence
impurities
Issue Date: 5-Jun-2019
Date Available: 9-Feb-2022
Language Code: en
DDC Class: 004 Datenverarbeitung; Informatik
Sponsor/Funder: EC/H2020/633053/EU/Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium/Euratom
Journal Title: Nuclear Fusion
Publisher: IOP
Volume: 59
Issue: 11
Article Number: 112004
Publisher DOI: 10.1088/1741-4326/ab03a7
EISSN: 1741-4326
ISSN: 0029-5515
TU Affiliation(s): Fak. 2 Mathematik und Naturwissenschaften » Inst. Theoretische Physik
Appears in Collections:Technische Universität Berlin » Publications

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