ASCOT modelling of ripple effects on toroidal torque

A. Salmi (Corresponding Author), T. Johnson, V. Parail, Jukka A. Heikkinen, V. Hynönen, T. P. Kiviniemi, T. Kurki-Suonio, JET-EFDA collaborators

Research output: Contribution to journalArticleScientificpeer-review

15 Citations (Scopus)

Abstract

Toroidal field ripple, δ =(Bmax ‐Bmin)/(Bmax +Bmin), in ITER will be relatively large, about 0.5% at the outer midplane. Due to the importance of toroidal rotation on plasma stability and confinement it is important to understand the consequences of a non‐negligible ripple field on rotation. Guiding centre following Monte Carlo code ASCOT is used to evaluate the torque on plasma from co‐current NBI in presence of toroidal magnetic field ripple. Simulations are made for a JET discharge from 2007 Ripple Campaign aimed to clarify the effect of ripple on fusion plasmas in preparation for ITER. ASCOT results show large reduction of torque from co‐NBI and negative torque from thermal ions, which together could create a counter rotating edge plasma.
Original languageEnglish
Pages (from-to)77-81
JournalContributions to Plasma Physics
Volume48
Issue number1-3
DOIs
Publication statusPublished - 2008
MoE publication typeA1 Journal article-refereed

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ripples
torque
plasma control
magnetohydrodynamic stability
counters
fusion
preparation
magnetic fields
ions
simulation

Keywords

  • MC
  • GC orbit following
  • ripple
  • torque

Cite this

Salmi, A., Johnson, T., Parail, V., Heikkinen, J. A., Hynönen, V., Kiviniemi, T. P., ... JET-EFDA collaborators (2008). ASCOT modelling of ripple effects on toroidal torque. Contributions to Plasma Physics, 48(1-3), 77-81. https://doi.org/10.1002/ctpp.200810013
Salmi, A. ; Johnson, T. ; Parail, V. ; Heikkinen, Jukka A. ; Hynönen, V. ; Kiviniemi, T. P. ; Kurki-Suonio, T. ; JET-EFDA collaborators. / ASCOT modelling of ripple effects on toroidal torque. In: Contributions to Plasma Physics. 2008 ; Vol. 48, No. 1-3. pp. 77-81.
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title = "ASCOT modelling of ripple effects on toroidal torque",
abstract = "Toroidal field ripple, δ =(Bmax ‐Bmin)/(Bmax +Bmin), in ITER will be relatively large, about 0.5{\%} at the outer midplane. Due to the importance of toroidal rotation on plasma stability and confinement it is important to understand the consequences of a non‐negligible ripple field on rotation. Guiding centre following Monte Carlo code ASCOT is used to evaluate the torque on plasma from co‐current NBI in presence of toroidal magnetic field ripple. Simulations are made for a JET discharge from 2007 Ripple Campaign aimed to clarify the effect of ripple on fusion plasmas in preparation for ITER. ASCOT results show large reduction of torque from co‐NBI and negative torque from thermal ions, which together could create a counter rotating edge plasma.",
keywords = "MC, GC orbit following, ripple, torque",
author = "A. Salmi and T. Johnson and V. Parail and Heikkinen, {Jukka A.} and V. Hyn{\"o}nen and Kiviniemi, {T. P.} and T. Kurki-Suonio and {JET-EFDA collaborators}",
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Salmi, A, Johnson, T, Parail, V, Heikkinen, JA, Hynönen, V, Kiviniemi, TP, Kurki-Suonio, T & JET-EFDA collaborators 2008, 'ASCOT modelling of ripple effects on toroidal torque', Contributions to Plasma Physics, vol. 48, no. 1-3, pp. 77-81. https://doi.org/10.1002/ctpp.200810013

ASCOT modelling of ripple effects on toroidal torque. / Salmi, A. (Corresponding Author); Johnson, T.; Parail, V.; Heikkinen, Jukka A.; Hynönen, V.; Kiviniemi, T. P.; Kurki-Suonio, T.; JET-EFDA collaborators.

In: Contributions to Plasma Physics, Vol. 48, No. 1-3, 2008, p. 77-81.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - ASCOT modelling of ripple effects on toroidal torque

AU - Salmi, A.

AU - Johnson, T.

AU - Parail, V.

AU - Heikkinen, Jukka A.

AU - Hynönen, V.

AU - Kiviniemi, T. P.

AU - Kurki-Suonio, T.

AU - JET-EFDA collaborators

PY - 2008

Y1 - 2008

N2 - Toroidal field ripple, δ =(Bmax ‐Bmin)/(Bmax +Bmin), in ITER will be relatively large, about 0.5% at the outer midplane. Due to the importance of toroidal rotation on plasma stability and confinement it is important to understand the consequences of a non‐negligible ripple field on rotation. Guiding centre following Monte Carlo code ASCOT is used to evaluate the torque on plasma from co‐current NBI in presence of toroidal magnetic field ripple. Simulations are made for a JET discharge from 2007 Ripple Campaign aimed to clarify the effect of ripple on fusion plasmas in preparation for ITER. ASCOT results show large reduction of torque from co‐NBI and negative torque from thermal ions, which together could create a counter rotating edge plasma.

AB - Toroidal field ripple, δ =(Bmax ‐Bmin)/(Bmax +Bmin), in ITER will be relatively large, about 0.5% at the outer midplane. Due to the importance of toroidal rotation on plasma stability and confinement it is important to understand the consequences of a non‐negligible ripple field on rotation. Guiding centre following Monte Carlo code ASCOT is used to evaluate the torque on plasma from co‐current NBI in presence of toroidal magnetic field ripple. Simulations are made for a JET discharge from 2007 Ripple Campaign aimed to clarify the effect of ripple on fusion plasmas in preparation for ITER. ASCOT results show large reduction of torque from co‐NBI and negative torque from thermal ions, which together could create a counter rotating edge plasma.

KW - MC

KW - GC orbit following

KW - ripple

KW - torque

U2 - 10.1002/ctpp.200810013

DO - 10.1002/ctpp.200810013

M3 - Article

VL - 48

SP - 77

EP - 81

JO - Contributions to Plasma Physics

JF - Contributions to Plasma Physics

SN - 0863-1042

IS - 1-3

ER -

Salmi A, Johnson T, Parail V, Heikkinen JA, Hynönen V, Kiviniemi TP et al. ASCOT modelling of ripple effects on toroidal torque. Contributions to Plasma Physics. 2008;48(1-3):77-81. https://doi.org/10.1002/ctpp.200810013