Impact of fast ions and fishbones on core turbulence at rational surfaces via global gyrokinetic GENE simulations.
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| Title: | Impact of fast ions and fishbones on core turbulence at rational surfaces via global gyrokinetic GENE simulations. |
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| Authors: | Brioschi, D.1 (AUTHOR) davide.brioschi@ipp.mpg.de, Di Siena, A.1 (AUTHOR), Bilato, R.1 (AUTHOR), Bottino, A.1 (AUTHOR), Hayward-Schneider, T.1 (AUTHOR), Mishchenko, A.2 (AUTHOR), Poli, E.1 (AUTHOR), Zocco, A.2 (AUTHOR), Jenko, F.1 (AUTHOR) |
| Source: | Nuclear Fusion. 2026, Vol. 66 Issue 7, p1-14. 14p. |
| Subjects: | Fast ions, Plasma turbulence, Plasma stability, Temperature distribution, Plasma instabilities, Plasma dynamics, Surfaces (Physics) |
| Abstract: | In this work, the interplay between fast ions (FIs) and safety factor rational surfaces is studied in a turbulent plasma via global nonlinear gyrokinetic simulations. The fast particle-induced enhancement of shearing structures from turbulence self-interaction is analyzed. Our study takes into account the competition between this mechanism and other FIs effects, i.e. thermal profiles dilution and quasi-resonant interaction. We find the reduction of the zonal modes destabilization threshold caused by FIs (Hahm et al 2023 Phys. Plasmas 30 072501) to be a very effective method to suppress turbulence. Indeed, it leads to the formation of regions where turbulent transport is reduced by 90% of its original value. Furthermore, an n = m = 1 fishbone is driven unstable inside the plasma and its interaction with turbulence is studied. We find the beat-driven zonal structure generated by this mode to further reduce turbulence when its presence does not drastically flatten the thermal profiles. [ABSTRACT FROM AUTHOR] |
| Copyright of Nuclear Fusion is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 194261846 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Impact of fast ions and fishbones on core turbulence at rational surfaces via global gyrokinetic GENE simulations. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Brioschi%2C+D%2E%22">Brioschi, D.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> davide.brioschi@ipp.mpg.de</i><br /><searchLink fieldCode="AR" term="%22Di+Siena%2C+A%2E%22">Di Siena, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bilato%2C+R%2E%22">Bilato, R.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Bottino%2C+A%2E%22">Bottino, A.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hayward-Schneider%2C+T%2E%22">Hayward-Schneider, T.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Mishchenko%2C+A%2E%22">Mishchenko, A.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Poli%2C+E%2E%22">Poli, E.</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zocco%2C+A%2E%22">Zocco, A.</searchLink><relatesTo>2</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Jenko%2C+F%2E%22">Jenko, F.</searchLink><relatesTo>1</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Nuclear+Fusion%22">Nuclear Fusion</searchLink>. 2026, Vol. 66 Issue 7, p1-14. 14p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Fast+ions%22">Fast ions</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+turbulence%22">Plasma turbulence</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+stability%22">Plasma stability</searchLink><br /><searchLink fieldCode="DE" term="%22Temperature+distribution%22">Temperature distribution</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+instabilities%22">Plasma instabilities</searchLink><br /><searchLink fieldCode="DE" term="%22Plasma+dynamics%22">Plasma dynamics</searchLink><br /><searchLink fieldCode="DE" term="%22Surfaces+%28Physics%29%22">Surfaces (Physics)</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: In this work, the interplay between fast ions (FIs) and safety factor rational surfaces is studied in a turbulent plasma via global nonlinear gyrokinetic simulations. The fast particle-induced enhancement of shearing structures from turbulence self-interaction is analyzed. Our study takes into account the competition between this mechanism and other FIs effects, i.e. thermal profiles dilution and quasi-resonant interaction. We find the reduction of the zonal modes destabilization threshold caused by FIs (Hahm et al 2023 Phys. Plasmas 30 072501) to be a very effective method to suppress turbulence. Indeed, it leads to the formation of regions where turbulent transport is reduced by 90% of its original value. Furthermore, an n = m = 1 fishbone is driven unstable inside the plasma and its interaction with turbulence is studied. We find the beat-driven zonal structure generated by this mode to further reduce turbulence when its presence does not drastically flatten the thermal profiles. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Nuclear Fusion is the property of IOP Publishing and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1088/1741-4326/ae6e54 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 14 StartPage: 1 Subjects: – SubjectFull: Fast ions Type: general – SubjectFull: Plasma turbulence Type: general – SubjectFull: Plasma stability Type: general – SubjectFull: Temperature distribution Type: general – SubjectFull: Plasma instabilities Type: general – SubjectFull: Plasma dynamics Type: general – SubjectFull: Surfaces (Physics) Type: general Titles: – TitleFull: Impact of fast ions and fishbones on core turbulence at rational surfaces via global gyrokinetic GENE simulations. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Brioschi, D. – PersonEntity: Name: NameFull: Di Siena, A. – PersonEntity: Name: NameFull: Bilato, R. – PersonEntity: Name: NameFull: Bottino, A. – PersonEntity: Name: NameFull: Hayward-Schneider, T. – PersonEntity: Name: NameFull: Mishchenko, A. – PersonEntity: Name: NameFull: Poli, E. – PersonEntity: Name: NameFull: Zocco, A. – PersonEntity: Name: NameFull: Jenko, F. IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 07 Text: 2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 00295515 Numbering: – Type: volume Value: 66 – Type: issue Value: 7 Titles: – TitleFull: Nuclear Fusion Type: main |
| ResultId | 1 |
