A key to improved ion core confinement in the JET tokamak: Ion stiffness mitigation due to combined plasma rotation and low magnetic shear

P. Mantica; C. Angioni; C. Challis; G. Colyer; L. Frassinetti; N. Hawkes; T. Johnson; M. Tsalas; P.C. Devries; J. Weiland; B. Baiocchi; M. Beurskens; A. Figueiredo; C. Giroud; J. Hobirk; E. Joffrin; E. Lerche; V. Naulin; A. G. Peeters; Antti Salmi; C. Sozzi; D. Strintzi; G. Staebler; Tuomas Tala; D. Van Eester; T. Versloot

doi:10.1103/PhysRevLett.107.135004

A key to improved ion core confinement in the JET tokamak: Ion stiffness mitigation due to combined plasma rotation and low magnetic shear

P. Mantica^*, C. Angioni, C. Challis, G. Colyer, L. Frassinetti, N. Hawkes, T. Johnson, M. Tsalas, P.C. Devries, J. Weiland, B. Baiocchi, M. Beurskens, A. Figueiredo, C. Giroud, J. Hobirk, E. Joffrin, E. Lerche, V. Naulin, A. G. Peeters, Antti SalmiC. Sozzi, D. Strintzi, G. Staebler, Tuomas Tala, D. Van Eester, T. Versloot

^*Corresponding author for this work

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

121 Citations (Scopus)

Abstract

New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)] results from the combined effect of high rotational shear and low magnetic shear. The observations have important implications for the understanding of improved ion core confinement in advanced tokamak scenarios. Simulations using quasilinear fluid and gyrofluid models show features of stiffness mitigation, while nonlinear gyrokinetic simulations do not. The JET experiments indicate that advanced tokamak scenarios in future devices will require sufficient rotational shear and the capability of q profile manipulation.

Original language	English
Article number	135004
Number of pages	5
Journal	Physical Review Letters
Volume	107
Issue number	13
DOIs	https://doi.org/10.1103/PhysRevLett.107.135004
Publication status	Published - 22 Sept 2011
MoE publication type	Not Eligible

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Mantica, P., Angioni, C., Challis, C., Colyer, G., Frassinetti, L., Hawkes, N., Johnson, T., Tsalas, M., Devries, P. C., Weiland, J., Baiocchi, B., Beurskens, M., Figueiredo, A., Giroud, C., Hobirk, J., Joffrin, E., Lerche, E., Naulin, V., Peeters, A. G., ... Versloot, T. (2011). A key to improved ion core confinement in the JET tokamak: Ion stiffness mitigation due to combined plasma rotation and low magnetic shear. Physical Review Letters, 107(13), Article 135004. https://doi.org/10.1103/PhysRevLett.107.135004

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title = "A key to improved ion core confinement in the JET tokamak: Ion stiffness mitigation due to combined plasma rotation and low magnetic shear",

abstract = "New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)] results from the combined effect of high rotational shear and low magnetic shear. The observations have important implications for the understanding of improved ion core confinement in advanced tokamak scenarios. Simulations using quasilinear fluid and gyrofluid models show features of stiffness mitigation, while nonlinear gyrokinetic simulations do not. The JET experiments indicate that advanced tokamak scenarios in future devices will require sufficient rotational shear and the capability of q profile manipulation.",

author = "P. Mantica and C. Angioni and C. Challis and G. Colyer and L. Frassinetti and N. Hawkes and T. Johnson and M. Tsalas and P.C. Devries and J. Weiland and B. Baiocchi and M. Beurskens and A. Figueiredo and C. Giroud and J. Hobirk and E. Joffrin and E. Lerche and V. Naulin and Peeters, {A. G.} and Antti Salmi and C. Sozzi and D. Strintzi and G. Staebler and Tuomas Tala and {Van Eester}, D. and T. Versloot",

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doi = "10.1103/PhysRevLett.107.135004",

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journal = "Physical Review Letters",

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Mantica, P, Angioni, C, Challis, C, Colyer, G, Frassinetti, L, Hawkes, N, Johnson, T, Tsalas, M, Devries, PC, Weiland, J, Baiocchi, B, Beurskens, M, Figueiredo, A, Giroud, C, Hobirk, J, Joffrin, E, Lerche, E, Naulin, V, Peeters, AG, Salmi, A, Sozzi, C, Strintzi, D, Staebler, G, Tala, T, Van Eester, D & Versloot, T 2011, 'A key to improved ion core confinement in the JET tokamak: Ion stiffness mitigation due to combined plasma rotation and low magnetic shear', Physical Review Letters, vol. 107, no. 13, 135004. https://doi.org/10.1103/PhysRevLett.107.135004

TY - JOUR

T1 - A key to improved ion core confinement in the JET tokamak

T2 - Ion stiffness mitigation due to combined plasma rotation and low magnetic shear

AU - Mantica, P.

AU - Angioni, C.

AU - Challis, C.

AU - Colyer, G.

AU - Frassinetti, L.

AU - Hawkes, N.

AU - Johnson, T.

AU - Tsalas, M.

AU - Devries, P.C.

AU - Weiland, J.

AU - Baiocchi, B.

AU - Beurskens, M.

AU - Figueiredo, A.

AU - Giroud, C.

AU - Hobirk, J.

AU - Joffrin, E.

AU - Lerche, E.

AU - Naulin, V.

AU - Peeters, A. G.

AU - Salmi, Antti

AU - Sozzi, C.

AU - Strintzi, D.

AU - Staebler, G.

AU - Tala, Tuomas

AU - Van Eester, D.

AU - Versloot, T.

PY - 2011/9/22

Y1 - 2011/9/22

N2 - New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)] results from the combined effect of high rotational shear and low magnetic shear. The observations have important implications for the understanding of improved ion core confinement in advanced tokamak scenarios. Simulations using quasilinear fluid and gyrofluid models show features of stiffness mitigation, while nonlinear gyrokinetic simulations do not. The JET experiments indicate that advanced tokamak scenarios in future devices will require sufficient rotational shear and the capability of q profile manipulation.

AB - New transport experiments on JET indicate that ion stiffness mitigation in the core of a rotating plasma, as described by Mantica et al. [Phys. Rev. Lett. 102, 175002 (2009)] results from the combined effect of high rotational shear and low magnetic shear. The observations have important implications for the understanding of improved ion core confinement in advanced tokamak scenarios. Simulations using quasilinear fluid and gyrofluid models show features of stiffness mitigation, while nonlinear gyrokinetic simulations do not. The JET experiments indicate that advanced tokamak scenarios in future devices will require sufficient rotational shear and the capability of q profile manipulation.

U2 - 10.1103/PhysRevLett.107.135004

DO - 10.1103/PhysRevLett.107.135004

M3 - Article

AN - SCOPUS:80053108127

SN - 0031-9007

VL - 107

JO - Physical Review Letters

JF - Physical Review Letters

IS - 13

M1 - 135004

ER -

A key to improved ion core confinement in the JET tokamak: Ion stiffness mitigation due to combined plasma rotation and low magnetic shear

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