Local gyrokinetic simulations of tokamaks with non-uniform magnetic shear Article Swipe
Justin Ball
,
S. Brunner
·
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2208.11984
YOU?
·
· 2022
· Open Access
·
· DOI: https://doi.org/10.48550/arxiv.2208.11984
In this work, we modify the standard flux tube simulation domain to include arbitrary ion gyroradius-scale variation in the radial profile of the safety factor. To determine how to appropriately include such a modification, we add a strong ion gyroradius-scale source (inspired by electron cyclotron current drive) to the Fokker-Planck equation, then perform a multi-scale analysis that distinguishes the fast electrons driven by the source from the slow bulk thermal electrons. This allows us to systematically derive the needed changes to the gyrokinetic model. We find new terms that adjust the ion and electron parallel streaming to be along the modified field lines. These terms have been successfully implemented in a gyrokinetic code (while retaining the typical Fourier representation), which enables flux tube studies of non-monotonic safety factor profiles and the associated profile shearing. As an illustrative example, we investigate tokamaks with positive versus negative triangularity plasma shaping and find that the importance of profile shearing is not significantly affected by the change in shape.
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Metadata
- Type
- preprint
- Language
- en
- Landing Page
- http://arxiv.org/abs/2208.11984
- https://arxiv.org/pdf/2208.11984
- OA Status
- green
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W4293326907
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W4293326907Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.48550/arxiv.2208.11984Digital Object Identifier
- Title
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Local gyrokinetic simulations of tokamaks with non-uniform magnetic shearWork title
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preprintOpenAlex work type
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enPrimary language
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2022Year of publication
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2022-08-25Full publication date if available
- Authors
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Justin Ball, S. BrunnerList of authors in order
- Landing page
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https://arxiv.org/abs/2208.11984Publisher landing page
- PDF URL
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https://arxiv.org/pdf/2208.11984Direct link to full text PDF
- Open access
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YesWhether a free full text is available
- OA status
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greenOpen access status per OpenAlex
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https://arxiv.org/pdf/2208.11984Direct OA link when available
- Concepts
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Tokamak, Shear (geology), Physics, Mechanics, Statistical physics, Materials science, Plasma, Nuclear physics, Composite materialTop concepts (fields/topics) attached by OpenAlex
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0Total citation count in OpenAlex
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10Other works algorithmically related by OpenAlex
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