Investigating the role of divertor geometry on density build-up in the island divertor
The island divertor has been proposed for power and particle exhaust in stellarators. It is investigated in the Wendelstein 7-X (W7-X) experiment. The divertor capabilities such as particle exhaust or radiative power dissipation scale with the divertor density. However, significantly lower divertor...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-03-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179125000262 |
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| author | N. Maaziz F. Reimold V.R. Winters D. Bold Y. Feng V. Perseo |
| author_facet | N. Maaziz F. Reimold V.R. Winters D. Bold Y. Feng V. Perseo |
| author_sort | N. Maaziz |
| collection | DOAJ |
| description | The island divertor has been proposed for power and particle exhaust in stellarators. It is investigated in the Wendelstein 7-X (W7-X) experiment. The divertor capabilities such as particle exhaust or radiative power dissipation scale with the divertor density. However, significantly lower divertor density has been obtained in W7-X in comparison to tokamaks and no high-recycling scaling is observed. To alleviate the impact of the complicated geometry, a simplified geometry model for the island divertor in EMC3-EIRENE is developed and used to investigate the effect of the divertor target geometry. We show that compared to the open divertor, a closed divertor geometry leads to higher achievable densities and in particular a much stronger scaling of the target density with respect to the separatrix density. |
| format | Article |
| id | doaj-art-741ae396655b47b8b0238e7f8b472916 |
| institution | Kabale University |
| issn | 2352-1791 |
| language | English |
| publishDate | 2025-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-741ae396655b47b8b0238e7f8b4729162025-02-07T04:47:45ZengElsevierNuclear Materials and Energy2352-17912025-03-0142101886Investigating the role of divertor geometry on density build-up in the island divertorN. Maaziz0F. Reimold1V.R. Winters2D. Bold3Y. Feng4V. Perseo5Corresponding author.; Max Planck Institute for Plasma Physics, Greifswald, GermanyMax Planck Institute for Plasma Physics, Greifswald, GermanyMax Planck Institute for Plasma Physics, Greifswald, GermanyMax Planck Institute for Plasma Physics, Greifswald, GermanyMax Planck Institute for Plasma Physics, Greifswald, GermanyMax Planck Institute for Plasma Physics, Greifswald, GermanyThe island divertor has been proposed for power and particle exhaust in stellarators. It is investigated in the Wendelstein 7-X (W7-X) experiment. The divertor capabilities such as particle exhaust or radiative power dissipation scale with the divertor density. However, significantly lower divertor density has been obtained in W7-X in comparison to tokamaks and no high-recycling scaling is observed. To alleviate the impact of the complicated geometry, a simplified geometry model for the island divertor in EMC3-EIRENE is developed and used to investigate the effect of the divertor target geometry. We show that compared to the open divertor, a closed divertor geometry leads to higher achievable densities and in particular a much stronger scaling of the target density with respect to the separatrix density.http://www.sciencedirect.com/science/article/pii/S2352179125000262Island divertorScrape-off layerDensity build-upClosed divertor |
| spellingShingle | N. Maaziz F. Reimold V.R. Winters D. Bold Y. Feng V. Perseo Investigating the role of divertor geometry on density build-up in the island divertor Nuclear Materials and Energy Island divertor Scrape-off layer Density build-up Closed divertor |
| title | Investigating the role of divertor geometry on density build-up in the island divertor |
| title_full | Investigating the role of divertor geometry on density build-up in the island divertor |
| title_fullStr | Investigating the role of divertor geometry on density build-up in the island divertor |
| title_full_unstemmed | Investigating the role of divertor geometry on density build-up in the island divertor |
| title_short | Investigating the role of divertor geometry on density build-up in the island divertor |
| title_sort | investigating the role of divertor geometry on density build up in the island divertor |
| topic | Island divertor Scrape-off layer Density build-up Closed divertor |
| url | http://www.sciencedirect.com/science/article/pii/S2352179125000262 |
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