Abstract
The initial simulation study of the neoclassical perpendicular self-diffusion transport in the SOL/Divertor regions for a realistic tokamak geometry with the IMPGYRO code has been performed in this paper. One of the most unique features of the IMPGYRO code is calculating exact Larmor orbit of the test particle instead of assuming guiding center approximation. Therefore, effects of the magnetic drifts in realistic tokamaks are naturally taken into account in the IMPGYRO code. This feature makes it possible to calculate neoclassical transport processes, which possibly become large in the SOL/divertor plasma. Indeed, neoclassical self-diffusion process, the resultant effect of the combination of magnetic drift and Coulomb collisions with background ions, has already been included in the IMPGYRO model. In the present paper, prior to implementing the detailed model of neoclassical transport process into IMPGYRO, we have investigated the effect of neoclassical selfdiffusion in a realistic tokamak geometry with lower single null X-point. We also use a model with guiding center approximation in order to compare with the IMPGYRO full orbit model. The preliminary calculation results of each model have shown differences in the perpendicular average velocity of impurity ions at the top region of the SOL. The mechanism which leads to the difference has been discussed. (
| Original language | English |
|---|---|
| Pages (from-to) | 646-650 |
| Number of pages | 5 |
| Journal | Contributions to Plasma Physics |
| Volume | 56 |
| Issue number | 6-8 |
| DOIs | |
| Publication status | Published - 2016 Aug 1 |
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Keywords
- impurity
- simulation
- SOL
- tungsten
ASJC Scopus subject areas
- Condensed Matter Physics
Cite this
Effects of Classical and Neo-classical Cross-field Transport of Tungsten Impurity in Realistic Tokamak Geometry. / Yamoto, S.; Homma, Y.; Inoue, H.; Sawada, Y.; Hoshino, K.; Hatayama, Akiyoshi; Bonnin, X.; Coster, D.; Schneider, R.
In: Contributions to Plasma Physics, Vol. 56, No. 6-8, 01.08.2016, p. 646-650.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Effects of Classical and Neo-classical Cross-field Transport of Tungsten Impurity in Realistic Tokamak Geometry
AU - Yamoto, S.
AU - Homma, Y.
AU - Inoue, H.
AU - Sawada, Y.
AU - Hoshino, K.
AU - Hatayama, Akiyoshi
AU - Bonnin, X.
AU - Coster, D.
AU - Schneider, R.
PY - 2016/8/1
Y1 - 2016/8/1
N2 - The initial simulation study of the neoclassical perpendicular self-diffusion transport in the SOL/Divertor regions for a realistic tokamak geometry with the IMPGYRO code has been performed in this paper. One of the most unique features of the IMPGYRO code is calculating exact Larmor orbit of the test particle instead of assuming guiding center approximation. Therefore, effects of the magnetic drifts in realistic tokamaks are naturally taken into account in the IMPGYRO code. This feature makes it possible to calculate neoclassical transport processes, which possibly become large in the SOL/divertor plasma. Indeed, neoclassical self-diffusion process, the resultant effect of the combination of magnetic drift and Coulomb collisions with background ions, has already been included in the IMPGYRO model. In the present paper, prior to implementing the detailed model of neoclassical transport process into IMPGYRO, we have investigated the effect of neoclassical selfdiffusion in a realistic tokamak geometry with lower single null X-point. We also use a model with guiding center approximation in order to compare with the IMPGYRO full orbit model. The preliminary calculation results of each model have shown differences in the perpendicular average velocity of impurity ions at the top region of the SOL. The mechanism which leads to the difference has been discussed. (
AB - The initial simulation study of the neoclassical perpendicular self-diffusion transport in the SOL/Divertor regions for a realistic tokamak geometry with the IMPGYRO code has been performed in this paper. One of the most unique features of the IMPGYRO code is calculating exact Larmor orbit of the test particle instead of assuming guiding center approximation. Therefore, effects of the magnetic drifts in realistic tokamaks are naturally taken into account in the IMPGYRO code. This feature makes it possible to calculate neoclassical transport processes, which possibly become large in the SOL/divertor plasma. Indeed, neoclassical self-diffusion process, the resultant effect of the combination of magnetic drift and Coulomb collisions with background ions, has already been included in the IMPGYRO model. In the present paper, prior to implementing the detailed model of neoclassical transport process into IMPGYRO, we have investigated the effect of neoclassical selfdiffusion in a realistic tokamak geometry with lower single null X-point. We also use a model with guiding center approximation in order to compare with the IMPGYRO full orbit model. The preliminary calculation results of each model have shown differences in the perpendicular average velocity of impurity ions at the top region of the SOL. The mechanism which leads to the difference has been discussed. (
KW - impurity
KW - simulation
KW - SOL
KW - tungsten
UR - http://www.scopus.com/inward/record.url?scp=84983550726&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84983550726&partnerID=8YFLogxK
U2 - 10.1002/ctpp.201610068
DO - 10.1002/ctpp.201610068
M3 - Article
AN - SCOPUS:84983550726
VL - 56
SP - 646
EP - 650
JO - Contributions to Plasma Physics
JF - Contributions to Plasma Physics
SN - 0863-1042
IS - 6-8
ER -