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 contributors

doi:10.1088/0029-5515/52/4/042001

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 contributors

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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/χ_φ, 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 χ_φ/χ_i 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 language	English
Article number	042001
Number of pages	6
Journal	Nuclear Fusion
Volume	52
Issue number	4
DOIs	https://doi.org/10.1088/0029-5515/52/4/042001
Publication status	Published - 2012
MoE publication type	A1 Journal article-refereed

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title = "Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas: Letter",

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.",

author = "H. Weisen and Y. Camenen and A. Salmi and T.W. Versloot and {de Vries}, P.C. and M. Maslov and Tuomas Tala and M. Beurskens and C. Giroud and {JET-EFDA contributors}",

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doi = "10.1088/0029-5515/52/4/042001",

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T1 - Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas

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 contributors

PY - 2012

Y1 - 2012

N2 - 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.

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.

U2 - 10.1088/0029-5515/52/4/042001

DO - 10.1088/0029-5515/52/4/042001

M3 - Article

SN - 0029-5515

VL - 52

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 4

M1 - 042001

ER -

Identification of the ubiquitous Coriolis momentum pinch in JET tokamak plasmas: Letter

Abstract

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