Journal article
Optimized up-down asymmetry to drive fast intrinsic rotation in tokamaks
- Abstract:
- Breaking the up-down symmetry of the tokamak poloidal cross-section can significantly increase the spontaneous rotation due to turbulent momentum transport. In this work, we optimize the shape of flux surfaces with both tilted elongation and tilted triangularity in order to maximize this drive of intrinsic rotation. Nonlinear gyrokinetic simulations demonstrate that adding optimally-tilted triangularity can double the momentum transport of a tilted elliptical shape. This work indicates that tilting the elongation and triangularity in an ITER-like device can reduce the energy transport and drive intrinsic rotation with an Alfv\'{e}n Mach number on the order of $1\%$. This rotation is four times larger than the rotation expected in ITER and is sufficient to stabilize MHD instabilities. It is shown that this optimal shape can be created using the shaping coils of several experiments.
- Publication status:
- Published
- Peer review status:
- Peer reviewed
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- Files:
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(Preview, Accepted manuscript, pdf, 3.2MB, Terms of use)
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- Publisher copy:
- 10.1088/1741-4326/aa9a50
Authors
- Publisher:
- Institute of Physics
- Journal:
- Nuclear Fusion More from this journal
- Volume:
- 58
- Issue:
- 2
- Pages:
- 026003
- Publication date:
- 2017-11-14
- Acceptance date:
- 2017-11-14
- DOI:
- Keywords:
- Pubs id:
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pubs:685372
- UUID:
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uuid:c90afa81-aedb-41ef-9827-6def194c732c
- Local pid:
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pubs:685372
- Source identifiers:
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685372
- Deposit date:
-
2017-11-14
Terms of use
- Copyright holder:
- European Atomic Energy Community
- Copyright date:
- 2017
- Notes:
- © 2017 EURATOM. This is the accepted manuscript version of the article. The final version is available online from the Institute of Physics at: https://doi.org/10.1088/1741-4326/aa9a50
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