Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas

Letter

H. Weisen, Y. Camenen, A. Salmi, T.W. Versloot, P.C. de Vries, M. Maslov, Tuomas Tala, M. Beurskens, C. Giroud, JET-EFDA collaborators

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

A broad survey of the experimental database of neutral beam heated plasmas in the JET tokamak has established the theoretically expected ubiquity, in rotating plasmas, of a convective transport mechanism which has its origin in the vertical particle drift resulting from the Coriolis force. This inward convection, or pinch, leads to inward transport of toroidal angular momentum and is characterized by pinch numbers RVφ, which rise from near unity at r/a ≈ 0.25 to around 5 at r/a ≈ 0.85. Linear gyrokinetic calculations of the Coriolis pinch number and the Prandtl number χφi are in good agreement with the experimental observations, with similar dependences on plasma parameters. The data, however, do not rule out contributions from different processes, such as residual stresses.
Original languageEnglish
Article number042001
Number of pages6
JournalNuclear Fusion
Volume52
Issue number4
DOIs
Publication statusPublished - 2012
MoE publication typeA1 Journal article-refereed

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rotating plasmas
momentum
neutral beams
Prandtl number
residual stress
unity
convection
angular momentum

Cite this

Weisen, H., Camenen, Y., Salmi, A., Versloot, T. W., de Vries, P. C., Maslov, M., ... JET-EFDA collaborators (2012). Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas: Letter. Nuclear Fusion, 52(4), [042001]. https://doi.org/10.1088/0029-5515/52/4/042001
Weisen, H. ; Camenen, Y. ; Salmi, A. ; Versloot, T.W. ; de Vries, P.C. ; Maslov, M. ; Tala, Tuomas ; Beurskens, M. ; Giroud, C. ; JET-EFDA collaborators. / Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas : Letter. In: Nuclear Fusion. 2012 ; Vol. 52, No. 4.
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abstract = "A broad survey of the experimental database of neutral beam heated plasmas in the JET tokamak has established the theoretically expected ubiquity, in rotating plasmas, of a convective transport mechanism which has its origin in the vertical particle drift resulting from the Coriolis force. This inward convection, or pinch, leads to inward transport of toroidal angular momentum and is characterized by pinch numbers RV/χφ, which rise from near unity at r/a ≈ 0.25 to around 5 at r/a ≈ 0.85. Linear gyrokinetic calculations of the Coriolis pinch number and the Prandtl number χφ/χi are in good agreement with the experimental observations, with similar dependences on plasma parameters. The data, however, do not rule out contributions from different processes, such as residual stresses.",
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Weisen, H, Camenen, Y, Salmi, A, Versloot, TW, de Vries, PC, Maslov, M, Tala, T, Beurskens, M, Giroud, C & JET-EFDA collaborators 2012, 'Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas: Letter', Nuclear Fusion, vol. 52, no. 4, 042001. https://doi.org/10.1088/0029-5515/52/4/042001

Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas : Letter. / Weisen, H.; Camenen, Y.; Salmi, A.; Versloot, T.W.; de Vries, P.C.; Maslov, M.; Tala, Tuomas; Beurskens, M.; Giroud, C.; JET-EFDA collaborators.

In: Nuclear Fusion, Vol. 52, No. 4, 042001, 2012.

Research output: Contribution to journalArticleScientificpeer-review

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T2 - Letter

AU - Weisen, H.

AU - Camenen, Y.

AU - Salmi, A.

AU - Versloot, T.W.

AU - de Vries, P.C.

AU - Maslov, M.

AU - Tala, Tuomas

AU - Beurskens, M.

AU - Giroud, C.

AU - JET-EFDA collaborators

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AB - A broad survey of the experimental database of neutral beam heated plasmas in the JET tokamak has established the theoretically expected ubiquity, in rotating plasmas, of a convective transport mechanism which has its origin in the vertical particle drift resulting from the Coriolis force. This inward convection, or pinch, leads to inward transport of toroidal angular momentum and is characterized by pinch numbers RV/χφ, which rise from near unity at r/a ≈ 0.25 to around 5 at r/a ≈ 0.85. Linear gyrokinetic calculations of the Coriolis pinch number and the Prandtl number χφ/χi are in good agreement with the experimental observations, with similar dependences on plasma parameters. The data, however, do not rule out contributions from different processes, such as residual stresses.

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