Effects of toroidal plasma current on divertor power depositions on Wendelstein 7-X

Yu Gao; Joachim Geiger; Marcin W. Jakubowski; Peter Drewelow; Michael Endler; Kian Rahbarnia; Sergey Bozhenkov; Matthias Otte; Yasuhiro Suzuki; Yuhe Feng; Holger Niemann; Fabio Pisano; Adnan Ali; Aleix Puig Sitjes; Marco Zanini; Heinrich Laqua; Torsten Stange; Stefan Marsen; Tamas Szepesi; Daihong Zhang; Carsten Killer; Kenneth Hammond; Samuel Lazerson; Barbara Cannas; Henning Thomsen; Tamara Andreeva; Ulrich Neuner; Jonathan Schilling; Alexander Knieps; Michael Rack; Yunfeng Liang

doi:10.1088/1741-4326/ab32c2

Effects of toroidal plasma current on divertor power depositions on Wendelstein 7-X

Yu Gao
, Joachim Geiger
, Marcin W. Jakubowski
, Peter Drewelow
, Michael Endler
, Kian Rahbarnia
, Sergey Bozhenkov
, Matthias Otte
, Yasuhiro Suzuki
, Yuhe Feng
, Holger Niemann
, Fabio Pisano
, Adnan Ali
, Aleix Puig Sitjes
, Marco Zanini
, Heinrich Laqua
, Torsten Stange
, Stefan Marsen
, Tamas Szepesi
, Daihong Zhang

Carsten Killer, Kenneth Hammond, Samuel Lazerson, Barbara Cannas, Henning Thomsen, Tamara Andreeva, Ulrich Neuner, Jonathan Schilling, Alexander Knieps, Michael Rack, Yunfeng Liang

Research output: Contribution to journal › Article › peer-review

43 Scopus citations

Abstract

The paper presents experimental observations and simulations for the effects of toroidal plasma current on divertor power depositions on W7-X. With increasing toroidal current accompanying changes in the island geometry result in a sweep of the strike line and a redistribution of the heat flux footprints. Good agreement between experiments, which partly used electron cyclotron current drive to generate an additional toroidal current contribution, and modelling using field line tracing in vacuum magnetic fields including an ad-hoc toroidal current on the magnetic axis is found for both standard and low-iota magnetic configurations.

Original language	English (US)
Article number	106015
Journal	Nuclear Fusion
Volume	59
Issue number	10
DOIs	https://doi.org/10.1088/1741-4326/ab32c2
State	Published - Aug 21 2019
Externally published	Yes

All Science Journal Classification (ASJC) codes

Nuclear and High Energy Physics
Condensed Matter Physics

Keywords

heat flux
island divertor
strike line
toroidal current
W7-X

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10.1088/1741-4326/ab32c2

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Gao, Y., Geiger, J., Jakubowski, M. W., Drewelow, P., Endler, M., Rahbarnia, K., Bozhenkov, S., Otte, M., Suzuki, Y., Feng, Y., Niemann, H., Pisano, F., Ali, A., Puig Sitjes, A., Zanini, M., Laqua, H., Stange, T., Marsen, S., Szepesi, T., ... Liang, Y. (2019). Effects of toroidal plasma current on divertor power depositions on Wendelstein 7-X. Nuclear Fusion, 59(10), Article 106015. https://doi.org/10.1088/1741-4326/ab32c2

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title = "Effects of toroidal plasma current on divertor power depositions on Wendelstein 7-X",

abstract = "The paper presents experimental observations and simulations for the effects of toroidal plasma current on divertor power depositions on W7-X. With increasing toroidal current accompanying changes in the island geometry result in a sweep of the strike line and a redistribution of the heat flux footprints. Good agreement between experiments, which partly used electron cyclotron current drive to generate an additional toroidal current contribution, and modelling using field line tracing in vacuum magnetic fields including an ad-hoc toroidal current on the magnetic axis is found for both standard and low-iota magnetic configurations.",

keywords = "heat flux, island divertor, strike line, toroidal current, W7-X",

author = "Yu Gao and Joachim Geiger and Jakubowski, \{Marcin W.\} and Peter Drewelow and Michael Endler and Kian Rahbarnia and Sergey Bozhenkov and Matthias Otte and Yasuhiro Suzuki and Yuhe Feng and Holger Niemann and Fabio Pisano and Adnan Ali and \{Puig Sitjes\}, Aleix and Marco Zanini and Heinrich Laqua and Torsten Stange and Stefan Marsen and Tamas Szepesi and Daihong Zhang and Carsten Killer and Kenneth Hammond and Samuel Lazerson and Barbara Cannas and Henning Thomsen and Tamara Andreeva and Ulrich Neuner and Jonathan Schilling and Alexander Knieps and Michael Rack and Yunfeng Liang",

note = "Publisher Copyright: {\textcopyright} EURATOM 2019.",

year = "2019",

month = aug,

day = "21",

doi = "10.1088/1741-4326/ab32c2",

language = "English (US)",

volume = "59",

journal = "Nuclear Fusion",

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Gao, Y, Geiger, J, Jakubowski, MW, Drewelow, P, Endler, M, Rahbarnia, K, Bozhenkov, S, Otte, M, Suzuki, Y, Feng, Y, Niemann, H, Pisano, F, Ali, A, Puig Sitjes, A, Zanini, M, Laqua, H, Stange, T, Marsen, S, Szepesi, T, Zhang, D, Killer, C, Hammond, K, Lazerson, S, Cannas, B, Thomsen, H, Andreeva, T, Neuner, U, Schilling, J, Knieps, A, Rack, M & Liang, Y 2019, 'Effects of toroidal plasma current on divertor power depositions on Wendelstein 7-X', Nuclear Fusion, vol. 59, no. 10, 106015. https://doi.org/10.1088/1741-4326/ab32c2

TY - JOUR

T1 - Effects of toroidal plasma current on divertor power depositions on Wendelstein 7-X

AU - Gao, Yu

AU - Geiger, Joachim

AU - Jakubowski, Marcin W.

AU - Drewelow, Peter

AU - Endler, Michael

AU - Rahbarnia, Kian

AU - Bozhenkov, Sergey

AU - Otte, Matthias

AU - Suzuki, Yasuhiro

AU - Feng, Yuhe

AU - Niemann, Holger

AU - Pisano, Fabio

AU - Ali, Adnan

AU - Puig Sitjes, Aleix

AU - Zanini, Marco

AU - Laqua, Heinrich

AU - Stange, Torsten

AU - Marsen, Stefan

AU - Szepesi, Tamas

AU - Zhang, Daihong

AU - Killer, Carsten

AU - Hammond, Kenneth

AU - Lazerson, Samuel

AU - Cannas, Barbara

AU - Thomsen, Henning

AU - Andreeva, Tamara

AU - Neuner, Ulrich

AU - Schilling, Jonathan

AU - Knieps, Alexander

AU - Rack, Michael

AU - Liang, Yunfeng

PY - 2019/8/21

Y1 - 2019/8/21

N2 - The paper presents experimental observations and simulations for the effects of toroidal plasma current on divertor power depositions on W7-X. With increasing toroidal current accompanying changes in the island geometry result in a sweep of the strike line and a redistribution of the heat flux footprints. Good agreement between experiments, which partly used electron cyclotron current drive to generate an additional toroidal current contribution, and modelling using field line tracing in vacuum magnetic fields including an ad-hoc toroidal current on the magnetic axis is found for both standard and low-iota magnetic configurations.

AB - The paper presents experimental observations and simulations for the effects of toroidal plasma current on divertor power depositions on W7-X. With increasing toroidal current accompanying changes in the island geometry result in a sweep of the strike line and a redistribution of the heat flux footprints. Good agreement between experiments, which partly used electron cyclotron current drive to generate an additional toroidal current contribution, and modelling using field line tracing in vacuum magnetic fields including an ad-hoc toroidal current on the magnetic axis is found for both standard and low-iota magnetic configurations.

KW - heat flux

KW - island divertor

KW - strike line

KW - toroidal current

KW - W7-X

UR - https://www.scopus.com/pages/publications/85072692615

UR - https://www.scopus.com/pages/publications/85072692615#tab=citedBy

U2 - 10.1088/1741-4326/ab32c2

DO - 10.1088/1741-4326/ab32c2

M3 - Article

AN - SCOPUS:85072692615

SN - 0029-5515

VL - 59

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 10

M1 - 106015

ER -

Effects of toroidal plasma current on divertor power depositions on Wendelstein 7-X

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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