Integrated modelling and multiscale gyrokinetic validation study of ETG turbulence in a JET hybrid H-mode scenario

Līga Avotiņa; Larisa Baumane; Mihails Haļitovs; Juris Jansons; Gunta Ķizāne; Andris Leščinskis; Broņislavs Leščinskis; Elīna Pajuste; Aigars Vītiņš; Artūrs Zariņš; Citrin J.; JET Contributors

doi:10.1088/1741-4326/ac7535

Integrated modelling and multiscale gyrokinetic validation study of ETG turbulence in a JET hybrid H-mode scenario

Līga Avotiņa
, Larisa Baumane
, Mihails Haļitovs
, Juris Jansons
, Gunta Ķizāne
, Andris Leščinskis
, Broņislavs Leščinskis
, Elīna Pajuste
, Aigars Vītiņš
, Artūrs Zariņš
, Citrin J.
, JET Contributors

Research output: Contribution to journal › Article › peer-review

23 Citations (Scopus)

Abstract

Previous studies with first-principle-based integrated modelling suggested that electron temperature gradient (ETG) turbulence may lead to an anti-gyroBohm isotope scaling in JET high-performance hybrid H-mode scenarios. A dedicated comparison study against higher-fidelity turbulence modelling invalidates this claim. Ion-scale turbulence with magnetic field perturbations included, can match the power balance fluxes within temperature gradient error margins. Multiscale gyrokinetic simulations from two distinct codes produce no significant ETG heat flux, demonstrating that simple rules-of-thumb are insufficient criteria for its onset.

Original language	English
Article number	086025
Journal	Nuclear Fusion
Volume	62
Issue number	8
DOIs	https://doi.org/10.1088/1741-4326/ac7535
Publication status	Published - Aug 2022

Keywords

gyrokinetics
integrated modelling
multiscale turbulence
reduced order modelling
tokamak

OECD Field of Science

1.3 Physical Sciences

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10.1088/1741-4326/ac7535

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Avotiņa, L., Baumane, L., Haļitovs, M., Jansons, J., Ķizāne, G., Leščinskis, A., Leščinskis, B., Pajuste, E., Vītiņš, A., Zariņš, A., J., C., & Contributors, JET. (2022). Integrated modelling and multiscale gyrokinetic validation study of ETG turbulence in a JET hybrid H-mode scenario. Nuclear Fusion, 62(8), Article 086025. https://doi.org/10.1088/1741-4326/ac7535

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title = "Integrated modelling and multiscale gyrokinetic validation study of ETG turbulence in a JET hybrid H-mode scenario",

abstract = "Previous studies with first-principle-based integrated modelling suggested that electron temperature gradient (ETG) turbulence may lead to an anti-gyroBohm isotope scaling in JET high-performance hybrid H-mode scenarios. A dedicated comparison study against higher-fidelity turbulence modelling invalidates this claim. Ion-scale turbulence with magnetic field perturbations included, can match the power balance fluxes within temperature gradient error margins. Multiscale gyrokinetic simulations from two distinct codes produce no significant ETG heat flux, demonstrating that simple rules-of-thumb are insufficient criteria for its onset.",

keywords = "gyrokinetics, integrated modelling, multiscale turbulence, reduced order modelling, tokamak",

author = "Līga Avotiņa and Larisa Baumane and Mihails Haļitovs and Juris Jansons and Gunta Ķizāne and Andris Le{\v s}{\v c}inskis and Broņislavs Le{\v s}{\v c}inskis and Elīna Pajuste and Aigars Vītiņ{\v s} and Artūrs Zariņ{\v s} and Citrin J. and JET Contributors",

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doi = "10.1088/1741-4326/ac7535",

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AU - Avotiņa, Līga

AU - Baumane, Larisa

AU - Haļitovs, Mihails

AU - Jansons, Juris

AU - Ķizāne, Gunta

AU - Leščinskis, Andris

AU - Leščinskis, Broņislavs

AU - Pajuste, Elīna

AU - Vītiņš, Aigars

AU - Zariņš, Artūrs

AU - J., Citrin

AU - Contributors, JET

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AB - Previous studies with first-principle-based integrated modelling suggested that electron temperature gradient (ETG) turbulence may lead to an anti-gyroBohm isotope scaling in JET high-performance hybrid H-mode scenarios. A dedicated comparison study against higher-fidelity turbulence modelling invalidates this claim. Ion-scale turbulence with magnetic field perturbations included, can match the power balance fluxes within temperature gradient error margins. Multiscale gyrokinetic simulations from two distinct codes produce no significant ETG heat flux, demonstrating that simple rules-of-thumb are insufficient criteria for its onset.

KW - gyrokinetics

KW - integrated modelling

KW - multiscale turbulence

KW - reduced order modelling

KW - tokamak

UR - https://iopscience.iop.org/article/10.1088/1741-4326/ac7535

UR - https://www.scopus.com/pages/publications/85133466810

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DO - 10.1088/1741-4326/ac7535

M3 - Article

SN - 0029-5515

VL - 62

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

M1 - 086025

ER -

Integrated modelling and multiscale gyrokinetic validation study of ETG turbulence in a JET hybrid H-mode scenario

Abstract

Keywords

OECD Field of Science

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