Experimental validation of a filament transport model in turbulent magnetized plasmas

D. Carralero, P. Manz, L. Aho-Mantila, G. Birkenmeier, M. Brix, M. Groth, H.W. Müller, U. Stroth, N. Vianello, E. Wolfrun

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

In a wide variety of natural and laboratory magnetized plasmas, filaments appear as a result of interchange instability. These convective structures substantially enhance transport in the direction perpendicular to the magnetic field. According to filament models, their propagation may follow different regimes depending on the parallel closure of charge conservation. This is of paramount importance in magnetic fusion plasmas, as high collisionality in the scrape-off layer may trigger a regime transition leading to strongly enhanced perpendicular particle fluxes. This work reports for the first time on an experimental verification of this process, linking enhanced transport with a regime transition as predicted by models. Based on these results, a novel scaling for global perpendicular particle transport in reactor relevant tokamaks such as ASDEX-Upgrade and JET is found, leading to important implications for next generation fusion devices.
Original languageEnglish
Article number215002
Number of pages5
JournalPhysical Review Letters
Volume115
Issue number21
DOIs
Publication statusPublished - 2015
MoE publication typeA1 Journal article-refereed

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filaments
fusion
flux (rate)
closures
conservation
actuators
reactors
scaling
propagation
magnetic fields

Cite this

Carralero, D. ; Manz, P. ; Aho-Mantila, L. ; Birkenmeier, G. ; Brix, M. ; Groth, M. ; Müller, H.W. ; Stroth, U. ; Vianello, N. ; Wolfrun, E. / Experimental validation of a filament transport model in turbulent magnetized plasmas. In: Physical Review Letters. 2015 ; Vol. 115, No. 21.
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abstract = "In a wide variety of natural and laboratory magnetized plasmas, filaments appear as a result of interchange instability. These convective structures substantially enhance transport in the direction perpendicular to the magnetic field. According to filament models, their propagation may follow different regimes depending on the parallel closure of charge conservation. This is of paramount importance in magnetic fusion plasmas, as high collisionality in the scrape-off layer may trigger a regime transition leading to strongly enhanced perpendicular particle fluxes. This work reports for the first time on an experimental verification of this process, linking enhanced transport with a regime transition as predicted by models. Based on these results, a novel scaling for global perpendicular particle transport in reactor relevant tokamaks such as ASDEX-Upgrade and JET is found, leading to important implications for next generation fusion devices.",
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Carralero, D, Manz, P, Aho-Mantila, L, Birkenmeier, G, Brix, M, Groth, M, Müller, HW, Stroth, U, Vianello, N & Wolfrun, E 2015, 'Experimental validation of a filament transport model in turbulent magnetized plasmas', Physical Review Letters, vol. 115, no. 21, 215002. https://doi.org/10.1103/PhysRevLett.115.215002

Experimental validation of a filament transport model in turbulent magnetized plasmas. / Carralero, D.; Manz, P.; Aho-Mantila, L.; Birkenmeier, G.; Brix, M.; Groth, M.; Müller, H.W.; Stroth, U.; Vianello, N.; Wolfrun, E.

In: Physical Review Letters, Vol. 115, No. 21, 215002, 2015.

Research output: Contribution to journalArticleScientificpeer-review

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T1 - Experimental validation of a filament transport model in turbulent magnetized plasmas

AU - Carralero, D.

AU - Manz, P.

AU - Aho-Mantila, L.

AU - Birkenmeier, G.

AU - Brix, M.

AU - Groth, M.

AU - Müller, H.W.

AU - Stroth, U.

AU - Vianello, N.

AU - Wolfrun, E.

PY - 2015

Y1 - 2015

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AB - In a wide variety of natural and laboratory magnetized plasmas, filaments appear as a result of interchange instability. These convective structures substantially enhance transport in the direction perpendicular to the magnetic field. According to filament models, their propagation may follow different regimes depending on the parallel closure of charge conservation. This is of paramount importance in magnetic fusion plasmas, as high collisionality in the scrape-off layer may trigger a regime transition leading to strongly enhanced perpendicular particle fluxes. This work reports for the first time on an experimental verification of this process, linking enhanced transport with a regime transition as predicted by models. Based on these results, a novel scaling for global perpendicular particle transport in reactor relevant tokamaks such as ASDEX-Upgrade and JET is found, leading to important implications for next generation fusion devices.

U2 - 10.1103/PhysRevLett.115.215002

DO - 10.1103/PhysRevLett.115.215002

M3 - Article

VL - 115

JO - Physical Review Letters

JF - Physical Review Letters

SN - 0031-9007

IS - 21

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