Composition of electron temperature gradient driven plasma turbulence in JET-ILW tokamak plasmas

Chapman-Oplopoiou B.; Līga Avotiņa; Larisa Baumane; Mihails Haļitovs; Patrīcija Kalniņa; Gunta Ķizāne; Andris Leščinskis; Elīna Pajuste; Anete Stīne Teimane; Aigars Vītiņš; Rūdolfs Jānis Zabolockis; Artūrs Zariņš; JET Contributors

doi:10.1103/PhysRevResearch.7.L012004

Composition of electron temperature gradient driven plasma turbulence in JET-ILW tokamak plasmas

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4 Citations (Scopus)

Abstract

This letter reports on new fundamental insights into small scale plasma turbulence that is responsible for confinement degradation on the JET tokamak. We compare the structure of electron temperature gradient (ETG) driven turbulence in the edge region of two JET ITER-like-wall (ILW) high-confinement-mode discharges operating at different levels of gas fuelling. By artificially removing the toroidal drifts from our gyrokinetic turbulence simulations, we demonstrate that the high gas pulse has a substantial component from the toroidal branch of ETG turbulence whilst the low gas pulse is completely driven by slab ETG turbulence. This enables us to explicitly answer why increased gas puffing on JET-ILW leads to confinement degradation.

Original language	English
Article number	L012004
Journal	Physical Review Research
Volume	7
Issue number	1
DOIs	https://doi.org/10.1103/PhysRevResearch.7.L012004
Publication status	Published - Jan 2025

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1.3 Physical Sciences

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10.1103/PhysRevResearch.7.L012004

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B., C.-O., Avotiņa, L., Baumane, L., Haļitovs, M., Kalniņa, P., Ķizāne, G., Leščinskis, A., Pajuste, E., Teimane, A. S., Vītiņš, A., Zabolockis, R. J., Zariņš, A., & Contributors, JET. (2025). Composition of electron temperature gradient driven plasma turbulence in JET-ILW tokamak plasmas. Physical Review Research, 7(1), Article L012004. https://doi.org/10.1103/PhysRevResearch.7.L012004

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title = "Composition of electron temperature gradient driven plasma turbulence in JET-ILW tokamak plasmas",

abstract = "This letter reports on new fundamental insights into small scale plasma turbulence that is responsible for confinement degradation on the JET tokamak. We compare the structure of electron temperature gradient (ETG) driven turbulence in the edge region of two JET ITER-like-wall (ILW) high-confinement-mode discharges operating at different levels of gas fuelling. By artificially removing the toroidal drifts from our gyrokinetic turbulence simulations, we demonstrate that the high gas pulse has a substantial component from the toroidal branch of ETG turbulence whilst the low gas pulse is completely driven by slab ETG turbulence. This enables us to explicitly answer why increased gas puffing on JET-ILW leads to confinement degradation.",

author = "Chapman-Oplopoiou B. and Līga Avotiņa and Larisa Baumane and Mihails Haļitovs and Patrīcija Kalniņa and Gunta Ķizāne and Andris Le{\v s}{\v c}inskis and Elīna Pajuste and Teimane, \{Anete Stīne\} and Aigars Vītiņ{\v s} and Zabolockis, \{Rūdolfs Jānis\} and Artūrs Zariņ{\v s} and JET Contributors",

note = "Publisher Copyright: {\textcopyright} 2025 authors. Published by the American Physical Society.",

year = "2025",

month = jan,

doi = "10.1103/PhysRevResearch.7.L012004",

language = "English",

volume = "7",

journal = "Physical Review Research",

issn = "2643-1564",

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B., C-O, Avotiņa, L, Baumane, L, Haļitovs, M , Kalniņa, P, Ķizāne, G, Leščinskis, A , Pajuste, E , Teimane, AS , Vītiņš, A , Zabolockis, RJ , Zariņš, A & Contributors, JET 2025, 'Composition of electron temperature gradient driven plasma turbulence in JET-ILW tokamak plasmas', Physical Review Research, vol. 7, no. 1, L012004. https://doi.org/10.1103/PhysRevResearch.7.L012004

TY - JOUR

T1 - Composition of electron temperature gradient driven plasma turbulence in JET-ILW tokamak plasmas

AU - B., Chapman-Oplopoiou

AU - Avotiņa, Līga

AU - Baumane, Larisa

AU - Haļitovs, Mihails

AU - Kalniņa, Patrīcija

AU - Ķizāne, Gunta

AU - Leščinskis, Andris

AU - Pajuste, Elīna

AU - Teimane, Anete Stīne

AU - Vītiņš, Aigars

AU - Zabolockis, Rūdolfs Jānis

AU - Zariņš, Artūrs

AU - Contributors, JET

PY - 2025/1

Y1 - 2025/1

N2 - This letter reports on new fundamental insights into small scale plasma turbulence that is responsible for confinement degradation on the JET tokamak. We compare the structure of electron temperature gradient (ETG) driven turbulence in the edge region of two JET ITER-like-wall (ILW) high-confinement-mode discharges operating at different levels of gas fuelling. By artificially removing the toroidal drifts from our gyrokinetic turbulence simulations, we demonstrate that the high gas pulse has a substantial component from the toroidal branch of ETG turbulence whilst the low gas pulse is completely driven by slab ETG turbulence. This enables us to explicitly answer why increased gas puffing on JET-ILW leads to confinement degradation.

AB - This letter reports on new fundamental insights into small scale plasma turbulence that is responsible for confinement degradation on the JET tokamak. We compare the structure of electron temperature gradient (ETG) driven turbulence in the edge region of two JET ITER-like-wall (ILW) high-confinement-mode discharges operating at different levels of gas fuelling. By artificially removing the toroidal drifts from our gyrokinetic turbulence simulations, we demonstrate that the high gas pulse has a substantial component from the toroidal branch of ETG turbulence whilst the low gas pulse is completely driven by slab ETG turbulence. This enables us to explicitly answer why increased gas puffing on JET-ILW leads to confinement degradation.

UR - https://www.scopus.com/pages/publications/85214555081

U2 - 10.1103/PhysRevResearch.7.L012004

DO - 10.1103/PhysRevResearch.7.L012004

M3 - Article

SN - 2643-1564

VL - 7

JO - Physical Review Research

JF - Physical Review Research

IS - 1

M1 - L012004

ER -

Composition of electron temperature gradient driven plasma turbulence in JET-ILW tokamak plasmas

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