DIFFER
DIFFER Publication
Author | |
Abstract |
High-performance fusion plasmas, requiring high pressure B, are not well-understood in stellarator-type experiments. Here, the effect of B on ion-temperature-gradient-driven (ITG) turbulence is studied in Wendelstein 7-X (W7-X), showing that subdominant kinetic ballooning modes (KBMs) are unstable well below the ideal MHD threshold and get strongly excited in the turbulence. By zonal-flow erosion, these sub-threshold KBMs (stKBMs) affect ITG saturation and enable higher heat fluxes. Controlling stKBMs will be essential to allow W7-X and future stellarators to achieve maximum performance. |
Year of Publication |
2023
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Journal |
Physical Review Letters
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Volume |
131
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Issue |
18
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Number of Pages |
185101
|
Date Published |
11/2023
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Publisher |
American Physical Society
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URL |
https://arxiv.org/abs/2306.03694
|
DOI |
10.1103/PhysRevLett.131.185101
|
PId |
db519aa5e41c2820d32e3f7e7ef21a31
|
Alternate Journal |
Phys. Rev. Lett.
|
Label |
OA
|
Journal Article
|
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