Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe
Knowledge of the edge ion temperature (Ti) is important to understand the edge physics in fusion plasmas. The Ti edge profile has been successfully measured at W7-X in an island divertor configuration using a retarding field analyzer probe on a reciprocating manipulator. The experimental observation...
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ftfzjuelichnvdb:oai:juser.fz-juelich.de:891406 2024-09-15T18:04:25+00:00 Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe Li, Yun Henkel, Marion Effenberg, F. Zhang, D. Hacker, P. Höschen, D. Satheeswaran, G. Liu, S. Grulke, O. Jakubowski, M. Brezinsek, S. Otte, M. Liang, Yunfeng Neubauer, O. Schweer, B. Xu, G. S. Cai, J. Huang, Z. Knieps, A. Drews, P. Killer, C. Nicolai, D. Cosfeld, J. Geiger, J. Feng, Y. DE 2019 https://juser.fz-juelich.de/record/891406 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-01491%22 eng eng IAEA info:eu-repo/semantics/altIdentifier/issn/0029-5515 info:eu-repo/semantics/altIdentifier/doi/10.1088/1741-4326/ab3a79 info:eu-repo/semantics/altIdentifier/hdl/2128/27482 info:eu-repo/semantics/altIdentifier/wos/WOS:000486374200002 info:eu-repo/semantics/altIdentifier/issn/1741-4326 https://juser.fz-juelich.de/record/891406 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-01491%22 info:eu-repo/semantics/embargoedAccess Nuclear fusion 59(12), 126002 - (2019). doi:10.1088/1741-4326/ab3a79 info:eu-repo/classification/ddc/620 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftfzjuelichnvdb https://doi.org/10.1088/1741-4326/ab3a79 2024-08-05T23:55:47Z Knowledge of the edge ion temperature (Ti) is important to understand the edge physics in fusion plasmas. The Ti edge profile has been successfully measured at W7-X in an island divertor configuration using a retarding field analyzer probe on a reciprocating manipulator. The experimental observations show that in the standard configuration, an ion temperature shoulder at the plasma boundary has been observed near the location where a sudden change of the magnetic field connection length appears in the scrape-off layer (SOL) region. The value of the Ti shoulder was observed to be dependent on the edge island structure modified by the control coils, SOL kinetic power, and electron density. A significant reduction and flattening in the edge ion temperature profile has been also observed during the nitrogen seeding from the upper horizontal divertor port. In addition, the edge ion-to-electron temperature ratio has been calculated, which gradually increases with the major radius and decreases with the normalized ion collisionality. An extended two-point model including upstream ion temperature is introduced to understand the experimental measurement. Article in Journal/Newspaper Edge Island Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) Nuclear Fusion 59 12 126002 |
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Forschungszentrum Jülich: JuSER (Juelich Shared Electronic Resources) |
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language |
English |
topic |
info:eu-repo/classification/ddc/620 |
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info:eu-repo/classification/ddc/620 Li, Yun Henkel, Marion Effenberg, F. Zhang, D. Hacker, P. Höschen, D. Satheeswaran, G. Liu, S. Grulke, O. Jakubowski, M. Brezinsek, S. Otte, M. Liang, Yunfeng Neubauer, O. Schweer, B. Xu, G. S. Cai, J. Huang, Z. Knieps, A. Drews, P. Killer, C. Nicolai, D. Cosfeld, J. Geiger, J. Feng, Y. Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe |
topic_facet |
info:eu-repo/classification/ddc/620 |
description |
Knowledge of the edge ion temperature (Ti) is important to understand the edge physics in fusion plasmas. The Ti edge profile has been successfully measured at W7-X in an island divertor configuration using a retarding field analyzer probe on a reciprocating manipulator. The experimental observations show that in the standard configuration, an ion temperature shoulder at the plasma boundary has been observed near the location where a sudden change of the magnetic field connection length appears in the scrape-off layer (SOL) region. The value of the Ti shoulder was observed to be dependent on the edge island structure modified by the control coils, SOL kinetic power, and electron density. A significant reduction and flattening in the edge ion temperature profile has been also observed during the nitrogen seeding from the upper horizontal divertor port. In addition, the edge ion-to-electron temperature ratio has been calculated, which gradually increases with the major radius and decreases with the normalized ion collisionality. An extended two-point model including upstream ion temperature is introduced to understand the experimental measurement. |
format |
Article in Journal/Newspaper |
author |
Li, Yun Henkel, Marion Effenberg, F. Zhang, D. Hacker, P. Höschen, D. Satheeswaran, G. Liu, S. Grulke, O. Jakubowski, M. Brezinsek, S. Otte, M. Liang, Yunfeng Neubauer, O. Schweer, B. Xu, G. S. Cai, J. Huang, Z. Knieps, A. Drews, P. Killer, C. Nicolai, D. Cosfeld, J. Geiger, J. Feng, Y. |
author_facet |
Li, Yun Henkel, Marion Effenberg, F. Zhang, D. Hacker, P. Höschen, D. Satheeswaran, G. Liu, S. Grulke, O. Jakubowski, M. Brezinsek, S. Otte, M. Liang, Yunfeng Neubauer, O. Schweer, B. Xu, G. S. Cai, J. Huang, Z. Knieps, A. Drews, P. Killer, C. Nicolai, D. Cosfeld, J. Geiger, J. Feng, Y. |
author_sort |
Li, Yun |
title |
Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe |
title_short |
Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe |
title_full |
Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe |
title_fullStr |
Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe |
title_full_unstemmed |
Measurement of the edge ion temperature in W7-X with island divertor by a retarding field analyzer probe |
title_sort |
measurement of the edge ion temperature in w7-x with island divertor by a retarding field analyzer probe |
publisher |
IAEA |
publishDate |
2019 |
url |
https://juser.fz-juelich.de/record/891406 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-01491%22 |
op_coverage |
DE |
genre |
Edge Island |
genre_facet |
Edge Island |
op_source |
Nuclear fusion 59(12), 126002 - (2019). doi:10.1088/1741-4326/ab3a79 |
op_relation |
info:eu-repo/semantics/altIdentifier/issn/0029-5515 info:eu-repo/semantics/altIdentifier/doi/10.1088/1741-4326/ab3a79 info:eu-repo/semantics/altIdentifier/hdl/2128/27482 info:eu-repo/semantics/altIdentifier/wos/WOS:000486374200002 info:eu-repo/semantics/altIdentifier/issn/1741-4326 https://juser.fz-juelich.de/record/891406 https://juser.fz-juelich.de/search?p=id:%22FZJ-2021-01491%22 |
op_rights |
info:eu-repo/semantics/embargoedAccess |
op_doi |
https://doi.org/10.1088/1741-4326/ab3a79 |
container_title |
Nuclear Fusion |
container_volume |
59 |
container_issue |
12 |
container_start_page |
126002 |
_version_ |
1810441902998159360 |