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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| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2025-03-01
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| Series: | Nuclear Materials and Energy |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179125000262 |
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| Summary: | 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. |
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| ISSN: | 2352-1791 |