The dynamic ergodic divertor in the TEXTOR tokamak: Plasma response to dynamic helical magnetic field perturbations

K. H. Finken; S. S. Abdullaev; W. Biel; M. F.M. De Bock; C. Busch; E. Farshi; M. Von Hellermann; G. M.D. Hogeweij; M. Jakubowski; R. Jaspers; H. R. Koslowski; A. Kraemer-Flecken; A. Lazaros; M. Lehnen; Y. Liang; A. Nicolai; O. Schmitz; B. Unterberg; E. Westerhof; R. Wolf; O. Zimmermann; M. De Baar; G. Bertschinger; S. Brezinsek; I. G.J. Classen; A. J.H. Donné; H. G. Esser; H. Gerhauser; B. Giesen; D. Harting; J. A. Hoekzema; P. W. Huettemann; S. Jachmich; K. Jakubowska; D. Kalupin; F. Kelly; Y. Kikuchi; A. Kirschner; R. Koch; M. Korten; A. Kreter; J. Krom; U. Kruezi; A. Litnovsky; X. Loozen; N. J. Lopes Cardozo; A. Lyssoivan; O. Marchuk; Ph Mertens; A. Messiaen; O. Neubauer; V. Philipps; A. Pospieszczyk; D. Reiser; D. Reiter; A. L. Rogister; T. Van Rompuy; A. Savtchkov; U. Samm; R. P. Schorn; F. C. Schueller; B. Schweer; G. Sergienko; K. H.G. Telesca; M. Tokar; G. Van Oost; R. Uhlemann; G. Van Wassenhove; R. Weynants; S. Wiesen; Y. Xu

doi:10.1088/0741-3335/46/12B/013

The dynamic ergodic divertor in the TEXTOR tokamak: Plasma response to dynamic helical magnetic field perturbations

K. H. Finken, S. S. Abdullaev, W. Biel, M. F.M. De Bock, C. Busch, E. Farshi, M. Von Hellermann, G. M.D. Hogeweij, M. Jakubowski, R. Jaspers, H. R. Koslowski, A. Kraemer-Flecken, A. Lazaros, M. Lehnen, Y. Liang, A. Nicolai, O. Schmitz, B. Unterberg, E. Westerhof, R. WolfO. Zimmermann, M. De Baar, G. Bertschinger, S. Brezinsek, I. G.J. Classen, A. J.H. Donné, H. G. Esser, H. Gerhauser, B. Giesen, D. Harting, J. A. Hoekzema, P. W. Huettemann, S. Jachmich, K. Jakubowska, D. Kalupin, F. Kelly, Y. Kikuchi, A. Kirschner, R. Koch, M. Korten, A. Kreter, J. Krom, U. Kruezi, A. Litnovsky, X. Loozen, N. J. Lopes Cardozo, A. Lyssoivan, O. Marchuk, Ph Mertens, A. Messiaen, O. Neubauer, V. Philipps, A. Pospieszczyk, D. Reiser, D. Reiter, A. L. Rogister, T. Van Rompuy, A. Savtchkov, U. Samm, R. P. Schorn, F. C. Schueller, B. Schweer, G. Sergienko, K. H.G. Telesca, M. Tokar, G. Van Oost, R. Uhlemann, G. Van Wassenhove, R. Weynants, S. Wiesen, Y. Xu

Laboratory for Plasma Physics

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Abstract

Recently, the dynamic ergodic divertor (DED) of TEXTOR has been studied in an m/n = 3/1 set-up which is characterized by a relatively deep penetration of the perturbation field. The perturbation field creates (a) a helical divertor, (b) an ergodic pattern and/or (c) excitation of tearing modes, depending on whether the DED current is static, rotating in the co-current direction or in the counter-current direction. Characteristic divertor properties such as the high recycling regime or enhanced shielding have been studied. A strong effect of the ergodization is spin up of the plasma rotation, possibly due to the electric field at the plasma edge. Tearing modes are excited in a rather reproducible way and their excitation threshold value, their motion and their reduction due to the ECRH/ECCD have been studied. The different scenarios are characterized by strong modifications of the toroidal velocity profile and by a reduced or enhanced radial transport.

Original language	English
Pages (from-to)	B143-B155
Journal	Plasma Physics and Controlled Fusion
Volume	46
Issue number	12 B
DOIs	https://doi.org/10.1088/0741-3335/46/12B/013
Publication status	Published - Dec 2004

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Finken, K. H., Abdullaev, S. S., Biel, W., De Bock, M. F. M., Busch, C., Farshi, E., Von Hellermann, M., Hogeweij, G. M. D., Jakubowski, M., Jaspers, R., Koslowski, H. R., Kraemer-Flecken, A., Lazaros, A., Lehnen, M., Liang, Y., Nicolai, A., Schmitz, O., Unterberg, B., Westerhof, E., ... Xu, Y. (2004). The dynamic ergodic divertor in the TEXTOR tokamak: Plasma response to dynamic helical magnetic field perturbations. Plasma Physics and Controlled Fusion, 46(12 B), B143-B155. https://doi.org/10.1088/0741-3335/46/12B/013

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title = "The dynamic ergodic divertor in the TEXTOR tokamak: Plasma response to dynamic helical magnetic field perturbations",

abstract = "Recently, the dynamic ergodic divertor (DED) of TEXTOR has been studied in an m/n = 3/1 set-up which is characterized by a relatively deep penetration of the perturbation field. The perturbation field creates (a) a helical divertor, (b) an ergodic pattern and/or (c) excitation of tearing modes, depending on whether the DED current is static, rotating in the co-current direction or in the counter-current direction. Characteristic divertor properties such as the high recycling regime or enhanced shielding have been studied. A strong effect of the ergodization is spin up of the plasma rotation, possibly due to the electric field at the plasma edge. Tearing modes are excited in a rather reproducible way and their excitation threshold value, their motion and their reduction due to the ECRH/ECCD have been studied. The different scenarios are characterized by strong modifications of the toroidal velocity profile and by a reduced or enhanced radial transport.",

author = "Finken, {K. H.} and Abdullaev, {S. S.} and W. Biel and {De Bock}, {M. F.M.} and C. Busch and E. Farshi and {Von Hellermann}, M. and Hogeweij, {G. M.D.} and M. Jakubowski and R. Jaspers and Koslowski, {H. R.} and A. Kraemer-Flecken and A. Lazaros and M. Lehnen and Y. Liang and A. Nicolai and O. Schmitz and B. Unterberg and E. Westerhof and R. Wolf and O. Zimmermann and {De Baar}, M. and G. Bertschinger and S. Brezinsek and Classen, {I. G.J.} and Donn{\'e}, {A. J.H.} and Esser, {H. G.} and H. Gerhauser and B. Giesen and D. Harting and Hoekzema, {J. A.} and Huettemann, {P. W.} and S. Jachmich and K. Jakubowska and D. Kalupin and F. Kelly and Y. Kikuchi and A. Kirschner and R. Koch and M. Korten and A. Kreter and J. Krom and U. Kruezi and A. Litnovsky and X. Loozen and {Lopes Cardozo}, {N. J.} and A. Lyssoivan and O. Marchuk and Ph Mertens and A. Messiaen and O. Neubauer and V. Philipps and A. Pospieszczyk and D. Reiser and D. Reiter and Rogister, {A. L.} and {Van Rompuy}, T. and A. Savtchkov and U. Samm and Schorn, {R. P.} and Schueller, {F. C.} and B. Schweer and G. Sergienko and Telesca, {K. H.G.} and M. Tokar and {Van Oost}, G. and R. Uhlemann and {Van Wassenhove}, G. and R. Weynants and S. Wiesen and Y. Xu",

year = "2004",

month = dec,

doi = "10.1088/0741-3335/46/12B/013",

language = "English",

volume = "46",

pages = "B143--B155",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

number = "12 B",

}

Finken, KH, Abdullaev, SS, Biel, W, De Bock, MFM, Busch, C, Farshi, E, Von Hellermann, M, Hogeweij, GMD, Jakubowski, M, Jaspers, R, Koslowski, HR, Kraemer-Flecken, A, Lazaros, A, Lehnen, M, Liang, Y, Nicolai, A, Schmitz, O, Unterberg, B, Westerhof, E, Wolf, R, Zimmermann, O, De Baar, M, Bertschinger, G, Brezinsek, S, Classen, IGJ, Donné, AJH, Esser, HG, Gerhauser, H, Giesen, B, Harting, D, Hoekzema, JA, Huettemann, PW, Jachmich, S, Jakubowska, K, Kalupin, D, Kelly, F, Kikuchi, Y, Kirschner, A, Koch, R, Korten, M, Kreter, A, Krom, J, Kruezi, U, Litnovsky, A, Loozen, X, Lopes Cardozo, NJ, Lyssoivan, A, Marchuk, O, Mertens, P, Messiaen, A, Neubauer, O, Philipps, V, Pospieszczyk, A, Reiser, D, Reiter, D, Rogister, AL, Van Rompuy, T, Savtchkov, A, Samm, U, Schorn, RP, Schueller, FC, Schweer, B, Sergienko, G, Telesca, KHG, Tokar, M, Van Oost, G, Uhlemann, R, Van Wassenhove, G, Weynants, R, Wiesen, S & Xu, Y 2004, 'The dynamic ergodic divertor in the TEXTOR tokamak: Plasma response to dynamic helical magnetic field perturbations', Plasma Physics and Controlled Fusion, vol. 46, no. 12 B, pp. B143-B155. https://doi.org/10.1088/0741-3335/46/12B/013

TY - JOUR

T1 - The dynamic ergodic divertor in the TEXTOR tokamak

T2 - Plasma response to dynamic helical magnetic field perturbations

AU - Finken, K. H.

AU - Abdullaev, S. S.

AU - Biel, W.

AU - De Bock, M. F.M.

AU - Busch, C.

AU - Farshi, E.

AU - Von Hellermann, M.

AU - Hogeweij, G. M.D.

AU - Jakubowski, M.

AU - Jaspers, R.

AU - Koslowski, H. R.

AU - Kraemer-Flecken, A.

AU - Lazaros, A.

AU - Lehnen, M.

AU - Liang, Y.

AU - Nicolai, A.

AU - Schmitz, O.

AU - Unterberg, B.

AU - Westerhof, E.

AU - Wolf, R.

AU - Zimmermann, O.

AU - De Baar, M.

AU - Bertschinger, G.

AU - Brezinsek, S.

AU - Classen, I. G.J.

AU - Donné, A. J.H.

AU - Esser, H. G.

AU - Gerhauser, H.

AU - Giesen, B.

AU - Harting, D.

AU - Hoekzema, J. A.

AU - Huettemann, P. W.

AU - Jachmich, S.

AU - Jakubowska, K.

AU - Kalupin, D.

AU - Kelly, F.

AU - Kikuchi, Y.

AU - Kirschner, A.

AU - Koch, R.

AU - Korten, M.

AU - Kreter, A.

AU - Krom, J.

AU - Kruezi, U.

AU - Litnovsky, A.

AU - Loozen, X.

AU - Lopes Cardozo, N. J.

AU - Lyssoivan, A.

AU - Marchuk, O.

AU - Mertens, Ph

AU - Messiaen, A.

AU - Neubauer, O.

AU - Philipps, V.

AU - Pospieszczyk, A.

AU - Reiser, D.

AU - Reiter, D.

AU - Rogister, A. L.

AU - Van Rompuy, T.

AU - Savtchkov, A.

AU - Samm, U.

AU - Schorn, R. P.

AU - Schueller, F. C.

AU - Schweer, B.

AU - Sergienko, G.

AU - Telesca, K. H.G.

AU - Tokar, M.

AU - Van Oost, G.

AU - Uhlemann, R.

AU - Van Wassenhove, G.

AU - Weynants, R.

AU - Wiesen, S.

AU - Xu, Y.

PY - 2004/12

Y1 - 2004/12

N2 - Recently, the dynamic ergodic divertor (DED) of TEXTOR has been studied in an m/n = 3/1 set-up which is characterized by a relatively deep penetration of the perturbation field. The perturbation field creates (a) a helical divertor, (b) an ergodic pattern and/or (c) excitation of tearing modes, depending on whether the DED current is static, rotating in the co-current direction or in the counter-current direction. Characteristic divertor properties such as the high recycling regime or enhanced shielding have been studied. A strong effect of the ergodization is spin up of the plasma rotation, possibly due to the electric field at the plasma edge. Tearing modes are excited in a rather reproducible way and their excitation threshold value, their motion and their reduction due to the ECRH/ECCD have been studied. The different scenarios are characterized by strong modifications of the toroidal velocity profile and by a reduced or enhanced radial transport.

AB - Recently, the dynamic ergodic divertor (DED) of TEXTOR has been studied in an m/n = 3/1 set-up which is characterized by a relatively deep penetration of the perturbation field. The perturbation field creates (a) a helical divertor, (b) an ergodic pattern and/or (c) excitation of tearing modes, depending on whether the DED current is static, rotating in the co-current direction or in the counter-current direction. Characteristic divertor properties such as the high recycling regime or enhanced shielding have been studied. A strong effect of the ergodization is spin up of the plasma rotation, possibly due to the electric field at the plasma edge. Tearing modes are excited in a rather reproducible way and their excitation threshold value, their motion and their reduction due to the ECRH/ECCD have been studied. The different scenarios are characterized by strong modifications of the toroidal velocity profile and by a reduced or enhanced radial transport.

UR - http://www.scopus.com/inward/record.url?scp=19944431018&partnerID=8YFLogxK

U2 - 10.1088/0741-3335/46/12B/013

DO - 10.1088/0741-3335/46/12B/013

M3 - Article

AN - SCOPUS:19944431018

SN - 0741-3335

VL - 46

SP - B143-B155

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 12 B

ER -

The dynamic ergodic divertor in the TEXTOR tokamak: Plasma response to dynamic helical magnetic field perturbations

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