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Loozen X, Larsen J, Dross F, Aleman M, Bearda T, O'Sullivan B, Gordon I, Poortmans J. Passivation of a Metal Contact with a Tunneling Layer. ACTA ACUST UNITED AC 2012. [DOI: 10.1016/j.egypro.2012.05.010] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Liang Y, Koslowski HR, Kelly FA, Tokar MZ, Loozen X, Bertschinger G, Biel W, Finken KH, Jakubowski MW, Krämer-Flecken A, Zimmermann O, Lehnen M, Sergienko G, Wolf RC. Influence of the dynamic ergodic divertor on the density limit in TEXTOR. Phys Rev Lett 2005; 94:105003. [PMID: 15783492 DOI: 10.1103/physrevlett.94.105003] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/19/2004] [Indexed: 05/24/2023]
Abstract
A significant influence of the dynamic ergodic divertor (DED) on the density limit in TEXTOR has been found. In Ohmic discharges, where without DED detachment normally arises at the density limit, a MARFE (multifaceted asymmetric radiation from the edge) develops when the DED is operated in a static regime. The threshold of the MARFE onset in the neutral beam heated plasmas is increased by applying 1 kHz ac DED at the high-field side. The theoretical predictions based on the parallel energy balance taking poloidal asymmetries into account agree well with the experimental observation.
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Affiliation(s)
- Y Liang
- Institut für Plasmaphysik, Forschungszentrum Jülich GmbH, Association FZJ-EURATOM, 52425, Jülich Germany
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Finken KH, Abdullaev SS, de Bock MFM, von Hellermann M, Jakubowski M, Jaspers R, Koslowski HR, Krämer-Flecken A, Lehnen M, Liang Y, Nicolai A, Wolf RC, Zimmermann O, de Baar M, Bertschinger G, Biel W, Brezinsek S, Busch C, Donné AJH, Esser HG, Farshi E, Gerhauser H, Giesen B, Harting D, Hoekzema JA, Hogeweij GMD, Hüttemann PW, Jachmich S, Jakubowska K, Kalupin D, Kelly F, Kikuchi Y, Kirschner A, Koch R, Korten M, Kreter A, Krom J, Kruezi U, Lazaros A, Litnovsky A, Loozen X, Lopes Cardozo NJ, Lyssoivan A, Marchuk O, Matsunaga G, Mertens P, Messiaen A, Neubauer O, Noda N, Philipps V, Pospieszczyk A, Reiser D, Reiter D, Rogister AL, Sakamoto M, Savtchkov A, Samm U, Schmitz O, Schorn RP, Schweer B, Schüller FC, Sergienko G, Spatschek KH, Telesca G, Tokar M, Uhlemann R, Unterberg B, Van Oost G, Van Rompuy T, Van Wassenhove G, Westerhof E, Weynants R, Wiesen S, Xu YH. Toroidal plasma rotation induced by the dynamic ergodic divertor in the TEXTOR tokamak. Phys Rev Lett 2005; 94:015003. [PMID: 15698091 DOI: 10.1103/physrevlett.94.015003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/28/2004] [Indexed: 05/24/2023]
Abstract
The first results of the Dynamic Ergodic Divertor in TEXTOR, when operating in the m/n=3/1 mode configuration, are presented. The deeply penetrating external magnetic field perturbation of this configuration increases the toroidal plasma rotation. Staying below the excitation threshold for the m/n=2/1 tearing mode, this toroidal rotation is always in the direction of the plasma current, even if the toroidal projection of the rotating magnetic field perturbation is in the opposite direction. The observed toroidal rotation direction is consistent with a radial electric field, generated by an enhanced electron transport in the ergodic layers near the resonances of the perturbation. This is an effect different from theoretical predictions, which assume a direct coupling between rotating perturbation and plasma to be the dominant effect of momentum transfer.
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Affiliation(s)
- K H Finken
- Trilateral Euregio Cluster: Institut für Plasmaphysik, Forschungszentrum Jülich, EURATOM Association, D-52425 Jülich, Germany
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