Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 77-81 |
| Journal | Contributions to Plasma Physics |
| Volume | 48 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 2008 |
| MoE publication type | A1 Journal article-refereed |
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Keywords
- MC
- GC orbit following
- ripple
- torque
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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 journal › Article › Scientific › peer-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 -