Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus)

J. Mailloux; B. Alper; Y. Baranov; A. Becoulet; A. Cardinali; C. Castaldo; R. Cesario; G. Conway; C. Challis; F. Crisanti; M. de Baar; P. de Vries; A. Ekedahl; K. Erents; C. Gowers; N. Hawkes; G. Hogeweij; F. Imbeaux; E. Joffrin; X. Litaudon; P. Lomas; G. Matthews; D. Mazon; V. Pericoli; R. Prentice; F. Rimini; Y. Sarazin; B. Stratton; A. Tuccillo; Tuomas Tala; K.-D. Zastrow; JET-EFDA contributors

doi:10.1063/1.1469026

Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus)

J. Mailloux, B. Alper, Y. Baranov, A. Becoulet, A. Cardinali, C. Castaldo, R. Cesario, G. Conway, C. Challis, F. Crisanti, M. de Baar, P. de Vries, A. Ekedahl, K. Erents, C. Gowers, N. Hawkes, G. Hogeweij, F. Imbeaux, E. Joffrin, X. LitaudonP. Lomas, G. Matthews, D. Mazon, V. Pericoli, R. Prentice, F. Rimini, Y. Sarazin, B. Stratton, A. Tuccillo, Tuomas Tala, K.-D. Zastrow, JET-EFDA contributors

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

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Abstract

In optimized shear plasmas in the Joint European Torus [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)], safety factor (q) profiles with negative magnetic shear are produced by applying lower hybrid (LH) waves during the plasma current ramp-up phase. These plasmas produce a barrier to the electron energy transport. The radius at which the barrier is located increases with the LH wave power. When heated with high power from ion cyclotron resonance heating and neutral beam injection, they can additionally produce transient internal transport barriers (ITBs) seen on the ion temperature, electron density, and toroidal rotation velocity profiles. Due to recent improvements in coupling, q profile control with LH current drive in ITB plasmas with strong combined heating can be explored. These new experiments have led to ITBs sustained for several seconds by the LH wave. Simulations show that the current driven by the LH waves peaks at the ITB location, indicating that it can act in the region of low magnetic shear.

Original language	English
Pages (from-to)	2156-2164
Journal	Physics of Plasmas
Volume	9
Issue number	5
DOIs	https://doi.org/10.1063/1.1469026
Publication status	Published - 2002
MoE publication type	A1 Journal article-refereed
Event	43rd Annual Meeting of the APS Division of Plasma Physics - Long Beach, United States Duration: 29 Oct 2001 → 2 Nov 2001

Keywords

plasma toroidal confinement
plasma transport processes
plasma hybrid waves
plasma beam injection heating
fusion reactor safety
plasma
plasma density
plasma temperature
electron density
plasma diagnostics
plasma simulation
plasma radiofrequency heating

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1063/1.1469026

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Mailloux, J., Alper, B., Baranov, Y., Becoulet, A., Cardinali, A., Castaldo, C., Cesario, R., Conway, G., Challis, C., Crisanti, F., de Baar, M., de Vries, P., Ekedahl, A., Erents, K., Gowers, C., Hawkes, N., Hogeweij, G., Imbeaux, F., Joffrin, E., ... JET-EFDA contributors (2002). Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus). Physics of Plasmas, 9(5), 2156-2164. https://doi.org/10.1063/1.1469026

@article{d0bf66c0aada4a5384b385369ab7313a,

title = "Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus)",

abstract = "In optimized shear plasmas in the Joint European Torus [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)], safety factor (q) profiles with negative magnetic shear are produced by applying lower hybrid (LH) waves during the plasma current ramp-up phase. These plasmas produce a barrier to the electron energy transport. The radius at which the barrier is located increases with the LH wave power. When heated with high power from ion cyclotron resonance heating and neutral beam injection, they can additionally produce transient internal transport barriers (ITBs) seen on the ion temperature, electron density, and toroidal rotation velocity profiles. Due to recent improvements in coupling, q profile control with LH current drive in ITB plasmas with strong combined heating can be explored. These new experiments have led to ITBs sustained for several seconds by the LH wave. Simulations show that the current driven by the LH waves peaks at the ITB location, indicating that it can act in the region of low magnetic shear.",

keywords = "plasma toroidal confinement, plasma transport processes, plasma hybrid waves, plasma beam injection heating, fusion reactor safety, plasma, plasma density, plasma temperature, electron density, plasma diagnostics, plasma simulation, plasma radiofrequency heating",

author = "J. Mailloux and B. Alper and Y. Baranov and A. Becoulet and A. Cardinali and C. Castaldo and R. Cesario and G. Conway and C. Challis and F. Crisanti and {de Baar}, M. and {de Vries}, P. and A. Ekedahl and K. Erents and C. Gowers and N. Hawkes and G. Hogeweij and F. Imbeaux and E. Joffrin and X. Litaudon and P. Lomas and G. Matthews and D. Mazon and V. Pericoli and R. Prentice and F. Rimini and Y. Sarazin and B. Stratton and A. Tuccillo and Tuomas Tala and K.-D. Zastrow and {JET-EFDA contributors}",

year = "2002",

doi = "10.1063/1.1469026",

language = "English",

volume = "9",

pages = "2156--2164",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics (AIP)",

number = "5",

note = "43rd Annual Meeting of the APS Division of Plasma Physics ; Conference date: 29-10-2001 Through 02-11-2001",

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Mailloux, J, Alper, B, Baranov, Y, Becoulet, A, Cardinali, A, Castaldo, C, Cesario, R, Conway, G, Challis, C, Crisanti, F, de Baar, M, de Vries, P, Ekedahl, A, Erents, K, Gowers, C, Hawkes, N, Hogeweij, G, Imbeaux, F, Joffrin, E, Litaudon, X, Lomas, P, Matthews, G, Mazon, D, Pericoli, V, Prentice, R, Rimini, F, Sarazin, Y, Stratton, B, Tuccillo, A, Tala, T, Zastrow, K-D & JET-EFDA contributors 2002, 'Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus)', Physics of Plasmas, vol. 9, no. 5, pp. 2156-2164. https://doi.org/10.1063/1.1469026

TY - JOUR

T1 - Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus)

AU - Mailloux, J.

AU - Alper, B.

AU - Baranov, Y.

AU - Becoulet, A.

AU - Cardinali, A.

AU - Castaldo, C.

AU - Cesario, R.

AU - Conway, G.

AU - Challis, C.

AU - Crisanti, F.

AU - de Baar, M.

AU - de Vries, P.

AU - Ekedahl, A.

AU - Erents, K.

AU - Gowers, C.

AU - Hawkes, N.

AU - Hogeweij, G.

AU - Imbeaux, F.

AU - Joffrin, E.

AU - Litaudon, X.

AU - Lomas, P.

AU - Matthews, G.

AU - Mazon, D.

AU - Pericoli, V.

AU - Prentice, R.

AU - Rimini, F.

AU - Sarazin, Y.

AU - Stratton, B.

AU - Tuccillo, A.

AU - Tala, Tuomas

AU - Zastrow, K.-D.

AU - JET-EFDA contributors

PY - 2002

Y1 - 2002

N2 - In optimized shear plasmas in the Joint European Torus [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)], safety factor (q) profiles with negative magnetic shear are produced by applying lower hybrid (LH) waves during the plasma current ramp-up phase. These plasmas produce a barrier to the electron energy transport. The radius at which the barrier is located increases with the LH wave power. When heated with high power from ion cyclotron resonance heating and neutral beam injection, they can additionally produce transient internal transport barriers (ITBs) seen on the ion temperature, electron density, and toroidal rotation velocity profiles. Due to recent improvements in coupling, q profile control with LH current drive in ITB plasmas with strong combined heating can be explored. These new experiments have led to ITBs sustained for several seconds by the LH wave. Simulations show that the current driven by the LH waves peaks at the ITB location, indicating that it can act in the region of low magnetic shear.

AB - In optimized shear plasmas in the Joint European Torus [P. H. Rebut and B. E. Keen, Fusion Technol. 11, 13 (1987)], safety factor (q) profiles with negative magnetic shear are produced by applying lower hybrid (LH) waves during the plasma current ramp-up phase. These plasmas produce a barrier to the electron energy transport. The radius at which the barrier is located increases with the LH wave power. When heated with high power from ion cyclotron resonance heating and neutral beam injection, they can additionally produce transient internal transport barriers (ITBs) seen on the ion temperature, electron density, and toroidal rotation velocity profiles. Due to recent improvements in coupling, q profile control with LH current drive in ITB plasmas with strong combined heating can be explored. These new experiments have led to ITBs sustained for several seconds by the LH wave. Simulations show that the current driven by the LH waves peaks at the ITB location, indicating that it can act in the region of low magnetic shear.

KW - plasma toroidal confinement

KW - plasma transport processes

KW - plasma hybrid waves

KW - plasma beam injection heating

KW - fusion reactor safety

KW - plasma

KW - plasma density

KW - plasma temperature

KW - electron density

KW - plasma diagnostics

KW - plasma simulation

KW - plasma radiofrequency heating

U2 - 10.1063/1.1469026

DO - 10.1063/1.1469026

M3 - Article

SN - 1070-664X

VL - 9

SP - 2156

EP - 2164

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 5

T2 - 43rd Annual Meeting of the APS Division of Plasma Physics

Y2 - 29 October 2001 through 2 November 2001

ER -

Progress in internal transport barrier plasmas with lower hybrid current drive and heating in JET (Joint European Torus)

Abstract

Keywords

UN SDGs

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