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Modelling of ETG turbulent transport in the TCV pedestal
École Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland.
UKAEA-CCFE, Culham Science Centre, OX143DB Abingdon, United Kingdom.
KTH, School of Electrical Engineering and Computer Science (EECS), Electrical Engineering, Electromagnetic Engineering and Fusion Science.ORCID iD: 0000-0002-9546-4494
École Polytechnique Fédérale de Lausanne (EPFL), Swiss Plasma Center (SPC), CH-1015 Lausanne, Switzerland.
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2025 (English)In: Plasma Physics and Controlled Fusion, ISSN 0741-3335, E-ISSN 1361-6587, Vol. 67, no 2, article id 025029Article in journal (Refereed) Published
Abstract [en]

Results of the first gyrokinetic simulations of the TCV pedestal are presented. Two discharges at varying levels of gas puffing are considered as input parameters for the local GENE simulations. Linear and nonlinear simulations are carried out for electron scale turbulence to determine the role of the electron temperature gradient (ETG) mode in the pedestal transport. The heat flux associated with ETG is found to be negligible compared to the total experimental electron heat flux at lower gas puff. At higher gas puff, computed heat flux was find to account for experimental values, demonstrating the importance of the ETG-driven transport in this case. Additional simulations are carried out with modified density profiles to investigate the difference between the two discharges. The change of the electron heat flux is found to be associated with the transition from slab- to toroidal-ETG due to the reduction of the normalized density gradient in the pedestal at the higher gas puffing.

Place, publisher, year, edition, pages
IOP Publishing , 2025. Vol. 67, no 2, article id 025029
Keywords [en]
gyrokinetic modelling, pedestal, TCV
National Category
Fusion, Plasma and Space Physics
Identifiers
URN: urn:nbn:se:kth:diva-359663DOI: 10.1088/1361-6587/adaa16ISI: 001406417300001Scopus ID: 2-s2.0-85216335536OAI: oai:DiVA.org:kth-359663DiVA, id: diva2:1935407
Note

QC 20250207

Available from: 2025-02-06 Created: 2025-02-06 Last updated: 2025-02-07Bibliographically approved

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Frassinetti, Lorenzo

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CiteExportLink to record
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Citation style
  • apa
  • ieee
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  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
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  • Other locale
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Output format
  • html
  • text
  • asciidoc
  • rtf