Evolution of the radial electric field in a JET H-mode plasma

Y. Andrew, N.C. Hawkes, T. Biewer, K. Crombe, D. Keeling, E. De La Luna, C. Giroud, A. Korotkov, A. Meigs, A. Murari, I. Nunes, R. Sartori, Tuomas Tala, JET-EFDA Contributors

Research output: Contribution to journalArticleScientificpeer-review

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Abstract

Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.
Original languageEnglish
Article number15003
JournalEurophysics Letters
Volume83
Issue number1
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

Fingerprint

Joint European Torus
electric fields
profiles
ion temperature
destruction
fusion
shear
impurities
carbon
ions
energy

Keywords

  • plasma
  • fusion plasma
  • JET
  • fusion energy
  • plasma toroidal confinement
  • poloidal momentum transport
  • poloidal velocity
  • tokamak

Cite this

Andrew, Y., Hawkes, N. C., Biewer, T., Crombe, K., Keeling, D., De La Luna, E., ... JET-EFDA Contributors (2008). Evolution of the radial electric field in a JET H-mode plasma. Europhysics Letters, 83(1), [15003]. https://doi.org/10.1209/0295-5075/83/15003
Andrew, Y. ; Hawkes, N.C. ; Biewer, T. ; Crombe, K. ; Keeling, D. ; De La Luna, E. ; Giroud, C. ; Korotkov, A. ; Meigs, A. ; Murari, A. ; Nunes, I. ; Sartori, R. ; Tala, Tuomas ; JET-EFDA Contributors. / Evolution of the radial electric field in a JET H-mode plasma. In: Europhysics Letters. 2008 ; Vol. 83, No. 1.
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abstract = "Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.",
keywords = "plasma, fusion plasma, JET, fusion energy, plasma toroidal confinement, poloidal momentum transport, poloidal velocity, tokamak",
author = "Y. Andrew and N.C. Hawkes and T. Biewer and K. Crombe and D. Keeling and {De La Luna}, E. and C. Giroud and A. Korotkov and A. Meigs and A. Murari and I. Nunes and R. Sartori and Tuomas Tala and {JET-EFDA Contributors}",
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Andrew, Y, Hawkes, NC, Biewer, T, Crombe, K, Keeling, D, De La Luna, E, Giroud, C, Korotkov, A, Meigs, A, Murari, A, Nunes, I, Sartori, R, Tala, T & JET-EFDA Contributors 2008, 'Evolution of the radial electric field in a JET H-mode plasma', Europhysics Letters, vol. 83, no. 1, 15003. https://doi.org/10.1209/0295-5075/83/15003

Evolution of the radial electric field in a JET H-mode plasma. / Andrew, Y.; Hawkes, N.C.; Biewer, T.; Crombe, K.; Keeling, D.; De La Luna, E.; Giroud, C.; Korotkov, A.; Meigs, A.; Murari, A.; Nunes, I.; Sartori, R.; Tala, Tuomas; JET-EFDA Contributors.

In: Europhysics Letters, Vol. 83, No. 1, 15003, 2008.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Evolution of the radial electric field in a JET H-mode plasma

AU - Andrew, Y.

AU - Hawkes, N.C.

AU - Biewer, T.

AU - Crombe, K.

AU - Keeling, D.

AU - De La Luna, E.

AU - Giroud, C.

AU - Korotkov, A.

AU - Meigs, A.

AU - Murari, A.

AU - Nunes, I.

AU - Sartori, R.

AU - Tala, Tuomas

AU - JET-EFDA Contributors,

PY - 2008

Y1 - 2008

N2 - Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.

AB - Results from recent measurements of carbon impurity ion toroidal and poloidal rotation velocities, ion temperature, ion density and the resulting radial electric field (Er) profiles are presented from an evolving Joint European Torus (JET) tokamak plasma over a range of energy and particle confinement regimes. Significant levels of edge plasma poloidal rotation velocity have been measured for the first time on JET, with maximum values of ±9 km s- 1. Such values of poloidal rotation provide an important contribution to the total edge plasma Er profiles. Large values of shear in the measured Er profiles are observed to arise as a consequence of the presence of the edge transport barrier (ETB) and do not appear to be necessary for their formation or destruction. These results have an important impact on potential mechanisms for transport barrier triggering and sustainment in present-day and future high-performance fusion plasmas.

KW - plasma

KW - fusion plasma

KW - JET

KW - fusion energy

KW - plasma toroidal confinement

KW - poloidal momentum transport

KW - poloidal velocity

KW - tokamak

U2 - 10.1209/0295-5075/83/15003

DO - 10.1209/0295-5075/83/15003

M3 - Article

VL - 83

JO - Europhysics Letters

JF - Europhysics Letters

SN - 0295-5075

IS - 1

M1 - 15003

ER -

Andrew Y, Hawkes NC, Biewer T, Crombe K, Keeling D, De La Luna E et al. Evolution of the radial electric field in a JET H-mode plasma. Europhysics Letters. 2008;83(1). 15003. https://doi.org/10.1209/0295-5075/83/15003