Effect of low magnetic shear induced by lower hybrid current drive on high performance internal transport barriers in the Joint European Torus (JET)

C. Castaldo, R. Cesario, A. Cardinali, X. Litaudon, Tuomas Tala, F. Crisanti, C. Cormezano, L. Panaccione, F. Santini, P. Smeulders, A. Tuccillo, Contributors to the EFDA-JET Work Programme

Research output: Contribution to journalArticleScientificpeer-review

28 Citations (Scopus)

Abstract

A low/negative magnetic shear profile is maintained in the Joint European Torus in a plasma target with plasma current of 2.4 MA using 2.2 MW of lower hybrid (LH) power combined with neutral beam injection and ion cyclotron radiofrequency heating. In this scenario, an internal transport barrier (ITB) with time duration up to about 4 s is produced. The fraction of LH driven current is about 25% the total plasma current. During LH power application, the layer with reversed shear q-profile can be maintained in a suitable radial position to inhibit the onset of turbulence, which might otherwise drive the ITB to collapse. LH power could be used as a tool to drive moderate amounts of noninductive off-axis current and sustain high performance ITBs at high plasma current.
Original languageEnglish
Pages (from-to)3205-3208
JournalPhysics of Plasmas
Volume9
Issue number8
DOIs
Publication statusPublished - 2002
MoE publication typeA1 Journal article-refereed

Fingerprint

Joint European Torus
plasma currents
shear
beam injection
neutral beams
profiles
cyclotrons
turbulence
heating
ions

Keywords

  • Tokamak devices
  • Tokamak
  • JET
  • plasma
  • plasma toroidal confinement
  • plasma transport processes
  • plasma hybrid waves
  • plasma beam injection heating
  • plasma radiofrequency heating
  • plasma turbulence

Cite this

Castaldo, C. ; Cesario, R. ; Cardinali, A. ; Litaudon, X. ; Tala, Tuomas ; Crisanti, F. ; Cormezano, C. ; Panaccione, L. ; Santini, F. ; Smeulders, P. ; Tuccillo, A. ; Programme, Contributors to the EFDA-JET Work. / Effect of low magnetic shear induced by lower hybrid current drive on high performance internal transport barriers in the Joint European Torus (JET). In: Physics of Plasmas. 2002 ; Vol. 9, No. 8. pp. 3205-3208.
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abstract = "A low/negative magnetic shear profile is maintained in the Joint European Torus in a plasma target with plasma current of 2.4 MA using 2.2 MW of lower hybrid (LH) power combined with neutral beam injection and ion cyclotron radiofrequency heating. In this scenario, an internal transport barrier (ITB) with time duration up to about 4 s is produced. The fraction of LH driven current is about 25{\%} the total plasma current. During LH power application, the layer with reversed shear q-profile can be maintained in a suitable radial position to inhibit the onset of turbulence, which might otherwise drive the ITB to collapse. LH power could be used as a tool to drive moderate amounts of noninductive off-axis current and sustain high performance ITBs at high plasma current.",
keywords = "Tokamak devices, Tokamak, JET, plasma, plasma toroidal confinement, plasma transport processes, plasma hybrid waves, plasma beam injection heating, plasma radiofrequency heating, plasma turbulence",
author = "C. Castaldo and R. Cesario and A. Cardinali and X. Litaudon and Tuomas Tala and F. Crisanti and C. Cormezano and L. Panaccione and F. Santini and P. Smeulders and A. Tuccillo and Programme, {Contributors to the EFDA-JET Work}",
year = "2002",
doi = "10.1063/1.1488951",
language = "English",
volume = "9",
pages = "3205--3208",
journal = "Physics of Plasmas",
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Castaldo, C, Cesario, R, Cardinali, A, Litaudon, X, Tala, T, Crisanti, F, Cormezano, C, Panaccione, L, Santini, F, Smeulders, P, Tuccillo, A & Programme, CTTEFDA-JETW 2002, 'Effect of low magnetic shear induced by lower hybrid current drive on high performance internal transport barriers in the Joint European Torus (JET)', Physics of Plasmas, vol. 9, no. 8, pp. 3205-3208. https://doi.org/10.1063/1.1488951

Effect of low magnetic shear induced by lower hybrid current drive on high performance internal transport barriers in the Joint European Torus (JET). / Castaldo, C.; Cesario, R.; Cardinali, A.; Litaudon, X.; Tala, Tuomas; Crisanti, F.; Cormezano, C.; Panaccione, L.; Santini, F.; Smeulders, P.; Tuccillo, A.; Programme, Contributors to the EFDA-JET Work.

In: Physics of Plasmas, Vol. 9, No. 8, 2002, p. 3205-3208.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of low magnetic shear induced by lower hybrid current drive on high performance internal transport barriers in the Joint European Torus (JET)

AU - Castaldo, C.

AU - Cesario, R.

AU - Cardinali, A.

AU - Litaudon, X.

AU - Tala, Tuomas

AU - Crisanti, F.

AU - Cormezano, C.

AU - Panaccione, L.

AU - Santini, F.

AU - Smeulders, P.

AU - Tuccillo, A.

AU - Programme, Contributors to the EFDA-JET Work

PY - 2002

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N2 - A low/negative magnetic shear profile is maintained in the Joint European Torus in a plasma target with plasma current of 2.4 MA using 2.2 MW of lower hybrid (LH) power combined with neutral beam injection and ion cyclotron radiofrequency heating. In this scenario, an internal transport barrier (ITB) with time duration up to about 4 s is produced. The fraction of LH driven current is about 25% the total plasma current. During LH power application, the layer with reversed shear q-profile can be maintained in a suitable radial position to inhibit the onset of turbulence, which might otherwise drive the ITB to collapse. LH power could be used as a tool to drive moderate amounts of noninductive off-axis current and sustain high performance ITBs at high plasma current.

AB - A low/negative magnetic shear profile is maintained in the Joint European Torus in a plasma target with plasma current of 2.4 MA using 2.2 MW of lower hybrid (LH) power combined with neutral beam injection and ion cyclotron radiofrequency heating. In this scenario, an internal transport barrier (ITB) with time duration up to about 4 s is produced. The fraction of LH driven current is about 25% the total plasma current. During LH power application, the layer with reversed shear q-profile can be maintained in a suitable radial position to inhibit the onset of turbulence, which might otherwise drive the ITB to collapse. LH power could be used as a tool to drive moderate amounts of noninductive off-axis current and sustain high performance ITBs at high plasma current.

KW - Tokamak devices

KW - Tokamak

KW - JET

KW - plasma

KW - plasma toroidal confinement

KW - plasma transport processes

KW - plasma hybrid waves

KW - plasma beam injection heating

KW - plasma radiofrequency heating

KW - plasma turbulence

U2 - 10.1063/1.1488951

DO - 10.1063/1.1488951

M3 - Article

VL - 9

SP - 3205

EP - 3208

JO - Physics of Plasmas

JF - Physics of Plasmas

SN - 1527-2419

IS - 8

ER -