Confinement in Wendelstein 7-X limiter plasmas

W. X. Team; M. Hirsch; A. Dinklage; A. Alonso; G. Fuchert; S. Bozhenkov; U. Höfel; T. Andreeva; J. Baldzuhn; M. Beurskens; H. S. Bosch; C. D. Beidler; C. Biedermann; E. Blanco; R. Brakel; R. Burhenn; B. Buttenschön; A. Cappa; A. Czarnecka; M. Endler; T. Estrada; T. Fornal; J. Geiger; O. Grulke; J. H. Harris; D. Hartmann; M. Jakubowski; T. Klinger; J. Knauer; G. Kocsis; R. König; P. Kornejew; A. Krämer-Flecken; N. Krawczyk; M. Krychowiak; M. Kubkowska; I. Ksiazek; A. Langenberg; H. P. Laqua; S. Lazerson; H. Maaßberg; N. Marushchenko; S. Marsen; V. Moncada; D. Moseev; D. Naujoks; M. Otte; N. Pablant; E. Pasch; F. Pisano; K. Rahbarnia; T. Schröder; T. Stange; L. Stephey; T. Szepesi; T. Sunn Pedersen; H. Trimino Mora; H. Thomsen; H. Tsuchiya; Yu Turkin; T. Wauters; G. Weir; U. Wenzel; A. Werner; R. Wolf; G. A. Wurden; D. Zhang

doi:10.1088/1741-4326/aa7372

Confinement in Wendelstein 7-X limiter plasmas

W. X. Team
, M. Hirsch
, A. Dinklage
, A. Alonso
, G. Fuchert
, S. Bozhenkov
, U. Höfel
, T. Andreeva
, J. Baldzuhn
, M. Beurskens
, H. S. Bosch
, C. D. Beidler
, C. Biedermann
, E. Blanco
, R. Brakel
, R. Burhenn
, B. Buttenschön
, A. Cappa
, A. Czarnecka
, M. Endler

T. Estrada, T. Fornal, J. Geiger, O. Grulke, J. H. Harris, D. Hartmann, M. Jakubowski, T. Klinger, J. Knauer, G. Kocsis, R. König, P. Kornejew, A. Krämer-Flecken, N. Krawczyk, M. Krychowiak, M. Kubkowska, I. Ksiazek, A. Langenberg, H. P. Laqua, S. Lazerson, H. Maaßberg, N. Marushchenko, S. Marsen, V. Moncada, D. Moseev, D. Naujoks, M. Otte, N. Pablant, E. Pasch, F. Pisano, K. Rahbarnia, T. Schröder, T. Stange, L. Stephey, T. Szepesi, T. Sunn Pedersen, H. Trimino Mora, H. Thomsen, H. Tsuchiya, Yu Turkin, T. Wauters, G. Weir, U. Wenzel, A. Werner, R. Wolf, G. A. Wurden, D. Zhang

Laboratory for Plasma Physics

Max-Planck-Institut für Plasmaphysik
CIEMAT
Institute of Plasma Physics and Laser Microfusion
Oak Ridge National Laboratory
Wigner Research Centre for Physics
FORSCHUNGSZENTRUM JULICH GMBH
University of Opole
Princeton Plasma Physics Laboratory
Commissariat à l'Énergie Atomique (CEA)
University of Cagliari
University of Wisconsin-Madison
National Institute for Fusion Science
Los Alamos National Laboratory

Résultats de recherche: Contribution à un journal › Article › Revue par des pairs

20 Citations (Scopus)

Résumé

Observations on confinement in the first experimental campaign on the optimized Stellarator Wendelstein 7-X are summarized. In this phase W7-X was equipped with five inboard limiters only and thus the discharge length restricted to avoid local overheating. Stationary plasmas are limited to low densities <2-3 • 10¹⁹ m^-3. With the available 4.3 MW ECR Heating core T _e ∼ 8 keV, T _i ∼ 1-2 keV are achieved routinely resulting in energy confinement time τ _E between 80 ms to 150 ms. For these conditions the plasmas show characteristics of core electron root confinement with peaked T _e-profiles and positive E _r up to about half of the minor radius. Profiles and plasma currents respond to on- and off-axis heating and co- and counter ECCD respectively.

langue originale	Anglais
Numéro d'article	086010
journal	Nuclear Fusion
Volume	57
Numéro de publication	8
Les DOIs	https://doi.org/10.1088/1741-4326/aa7372
état	Publié - 14 juin 2017

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10.1088/1741-4326/aa7372

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Team, W. X., Hirsch, M., Dinklage, A., Alonso, A., Fuchert, G., Bozhenkov, S., Höfel, U., Andreeva, T., Baldzuhn, J., Beurskens, M., Bosch, H. S., Beidler, C. D., Biedermann, C., Blanco, E., Brakel, R., Burhenn, R., Buttenschön, B., Cappa, A., Czarnecka, A., ... Zhang, D. (2017). Confinement in Wendelstein 7-X limiter plasmas. Nuclear Fusion, 57(8), Article 086010. https://doi.org/10.1088/1741-4326/aa7372

@article{c57831fbc27c4d6d825475aa99219b43,

title = "Confinement in Wendelstein 7-X limiter plasmas",

abstract = "Observations on confinement in the first experimental campaign on the optimized Stellarator Wendelstein 7-X are summarized. In this phase W7-X was equipped with five inboard limiters only and thus the discharge length restricted to avoid local overheating. Stationary plasmas are limited to low densities <2-3 • 1019 m-3. With the available 4.3 MW ECR Heating core T e ∼ 8 keV, T i ∼ 1-2 keV are achieved routinely resulting in energy confinement time τ E between 80 ms to 150 ms. For these conditions the plasmas show characteristics of core electron root confinement with peaked T e-profiles and positive E r up to about half of the minor radius. Profiles and plasma currents respond to on- and off-axis heating and co- and counter ECCD respectively.",

keywords = "confinement, energy confinement, stellarator",

author = "Team, \{W. X.\} and M. Hirsch and A. Dinklage and A. Alonso and G. Fuchert and S. Bozhenkov and U. H{\"o}fel and T. Andreeva and J. Baldzuhn and M. Beurskens and Bosch, \{H. S.\} and Beidler, \{C. D.\} and C. Biedermann and E. Blanco and R. Brakel and R. Burhenn and B. Buttensch{\"o}n and A. Cappa and A. Czarnecka and M. Endler and T. Estrada and T. Fornal and J. Geiger and O. Grulke and Harris, \{J. H.\} and D. Hartmann and M. Jakubowski and T. Klinger and J. Knauer and G. Kocsis and R. K{\"o}nig and P. Kornejew and A. Kr{\"a}mer-Flecken and N. Krawczyk and M. Krychowiak and M. Kubkowska and I. Ksiazek and A. Langenberg and Laqua, \{H. P.\} and S. Lazerson and H. Maa{\ss}berg and N. Marushchenko and S. Marsen and V. Moncada and D. Moseev and D. Naujoks and M. Otte and N. Pablant and E. Pasch and F. Pisano and K. Rahbarnia and T. Schr{\"o}der and T. Stange and L. Stephey and T. Szepesi and \{Sunn Pedersen\}, T. and \{Trimino Mora\}, H. and H. Thomsen and H. Tsuchiya and Yu Turkin and T. Wauters and G. Weir and U. Wenzel and A. Werner and R. Wolf and Wurden, \{G. A.\} and D. Zhang",

note = "Publisher Copyright: {\textcopyright} 2017 Max-Planck-Institut fuer Plasmaphysik.",

year = "2017",

month = jun,

day = "14",

doi = "10.1088/1741-4326/aa7372",

language = "English",

volume = "57",

journal = "Nuclear Fusion",

issn = "0029-5515",

number = "8",

}

Team, WX, Hirsch, M, Dinklage, A, Alonso, A, Fuchert, G, Bozhenkov, S, Höfel, U, Andreeva, T, Baldzuhn, J, Beurskens, M, Bosch, HS, Beidler, CD, Biedermann, C, Blanco, E, Brakel, R, Burhenn, R, Buttenschön, B, Cappa, A, Czarnecka, A, Endler, M, Estrada, T, Fornal, T, Geiger, J, Grulke, O, Harris, JH, Hartmann, D, Jakubowski, M, Klinger, T, Knauer, J, Kocsis, G, König, R, Kornejew, P, Krämer-Flecken, A, Krawczyk, N, Krychowiak, M, Kubkowska, M, Ksiazek, I, Langenberg, A, Laqua, HP, Lazerson, S, Maaßberg, H, Marushchenko, N, Marsen, S, Moncada, V, Moseev, D, Naujoks, D, Otte, M, Pablant, N, Pasch, E, Pisano, F, Rahbarnia, K, Schröder, T, Stange, T, Stephey, L, Szepesi, T, Sunn Pedersen, T, Trimino Mora, H, Thomsen, H, Tsuchiya, H, Turkin, Y, Wauters, T, Weir, G, Wenzel, U, Werner, A, Wolf, R, Wurden, GA & Zhang, D 2017, 'Confinement in Wendelstein 7-X limiter plasmas', Nuclear Fusion, VOL. 57, Numéro 8, 086010. https://doi.org/10.1088/1741-4326/aa7372

TY - JOUR

T1 - Confinement in Wendelstein 7-X limiter plasmas

AU - Team, W. X.

AU - Hirsch, M.

AU - Dinklage, A.

AU - Alonso, A.

AU - Fuchert, G.

AU - Bozhenkov, S.

AU - Höfel, U.

AU - Andreeva, T.

AU - Baldzuhn, J.

AU - Beurskens, M.

AU - Bosch, H. S.

AU - Beidler, C. D.

AU - Biedermann, C.

AU - Blanco, E.

AU - Brakel, R.

AU - Burhenn, R.

AU - Buttenschön, B.

AU - Cappa, A.

AU - Czarnecka, A.

AU - Endler, M.

AU - Estrada, T.

AU - Fornal, T.

AU - Geiger, J.

AU - Grulke, O.

AU - Harris, J. H.

AU - Hartmann, D.

AU - Jakubowski, M.

AU - Klinger, T.

AU - Knauer, J.

AU - Kocsis, G.

AU - König, R.

AU - Kornejew, P.

AU - Krämer-Flecken, A.

AU - Krawczyk, N.

AU - Krychowiak, M.

AU - Kubkowska, M.

AU - Ksiazek, I.

AU - Langenberg, A.

AU - Laqua, H. P.

AU - Lazerson, S.

AU - Maaßberg, H.

AU - Marushchenko, N.

AU - Marsen, S.

AU - Moncada, V.

AU - Moseev, D.

AU - Naujoks, D.

AU - Otte, M.

AU - Pablant, N.

AU - Pasch, E.

AU - Pisano, F.

AU - Rahbarnia, K.

AU - Schröder, T.

AU - Stange, T.

AU - Stephey, L.

AU - Szepesi, T.

AU - Sunn Pedersen, T.

AU - Trimino Mora, H.

AU - Thomsen, H.

AU - Tsuchiya, H.

AU - Turkin, Yu

AU - Wauters, T.

AU - Weir, G.

AU - Wenzel, U.

AU - Werner, A.

AU - Wolf, R.

AU - Wurden, G. A.

AU - Zhang, D.

PY - 2017/6/14

Y1 - 2017/6/14

N2 - Observations on confinement in the first experimental campaign on the optimized Stellarator Wendelstein 7-X are summarized. In this phase W7-X was equipped with five inboard limiters only and thus the discharge length restricted to avoid local overheating. Stationary plasmas are limited to low densities <2-3 • 1019 m-3. With the available 4.3 MW ECR Heating core T e ∼ 8 keV, T i ∼ 1-2 keV are achieved routinely resulting in energy confinement time τ E between 80 ms to 150 ms. For these conditions the plasmas show characteristics of core electron root confinement with peaked T e-profiles and positive E r up to about half of the minor radius. Profiles and plasma currents respond to on- and off-axis heating and co- and counter ECCD respectively.

AB - Observations on confinement in the first experimental campaign on the optimized Stellarator Wendelstein 7-X are summarized. In this phase W7-X was equipped with five inboard limiters only and thus the discharge length restricted to avoid local overheating. Stationary plasmas are limited to low densities <2-3 • 1019 m-3. With the available 4.3 MW ECR Heating core T e ∼ 8 keV, T i ∼ 1-2 keV are achieved routinely resulting in energy confinement time τ E between 80 ms to 150 ms. For these conditions the plasmas show characteristics of core electron root confinement with peaked T e-profiles and positive E r up to about half of the minor radius. Profiles and plasma currents respond to on- and off-axis heating and co- and counter ECCD respectively.

KW - confinement

KW - energy confinement

KW - stellarator

UR - https://www.scopus.com/pages/publications/85026516651

U2 - 10.1088/1741-4326/aa7372

DO - 10.1088/1741-4326/aa7372

M3 - Article

AN - SCOPUS:85026516651

SN - 0029-5515

VL - 57

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 086010

ER -

Confinement in Wendelstein 7-X limiter plasmas

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