Modelling of 13CH4 Injection and Local Carbon Deposition at the Outer Divertor of ASDEX Upgrade

Leena Aho-Mantila; Markus Airila; M. Wischmeier; K. Krieger; R. Pugno; V. Rohde; D.P. Coster; A.V. Chankin; R. Neu; ASDEX Upgrade Team

doi:10.1088/0031-8949/2009/T138/014019

Modelling of ¹³CH₄ Injection and Local Carbon Deposition at the Outer Divertor of ASDEX Upgrade

Leena Aho-Mantila (Corresponding Author), Markus Airila, M. Wischmeier, K. Krieger, R. Pugno, V. Rohde, D.P. Coster, A.V. Chankin, R. Neu, ASDEX Upgrade Team

Research output: Contribution to journal › Article › Scientific › peer-review

9 Citations (Scopus)

Abstract

Numerical modelling of ¹³CH₄ injection into the outer divertor plasma of the full tungsten, vertical target of ASDEX Upgrade is presented. The SOLPS5.0 code package is used to calculate a realistic scrape-off layer plasma background corresponding to L-mode discharges in the attached divertor plasma regime. The ERO code is then used for detailed modelling of the hydrocarbon break-up, re-deposition and re-erosion processes. The deposition patterns observed at two different poloidal locations are shown to strongly reflect the cross-field gradients in divertor plasma density and temperature, as well as the local plasma collisionality. Experimental results with forward and reversed B_T, accompanied by numerical modelling, also point towards a significant poloidal hydrocarbon E×B drift in the divertor region.

Original language	English
Article number	014019
Journal	Physica Scripta
Issue number	T138
DOIs	https://doi.org/10.1088/0031-8949/2009/T138/014019
Publication status	Published - 2009
MoE publication type	A1 Journal article-refereed
Event	12th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-12 - Jülich, Germany Duration: 11 May 2009 → 14 May 2009

Keywords

plasma physics
tokamaks
plasma-material interactions

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Access to Document

10.1088/0031-8949/2009/T138/014019

Cite this

@article{7d7f2b92a0d942fe8a7f3e142d998927,

title = "Modelling of 13CH4 Injection and Local Carbon Deposition at the Outer Divertor of ASDEX Upgrade",

abstract = "Numerical modelling of 13CH4 injection into the outer divertor plasma of the full tungsten, vertical target of ASDEX Upgrade is presented. The SOLPS5.0 code package is used to calculate a realistic scrape-off layer plasma background corresponding to L-mode discharges in the attached divertor plasma regime. The ERO code is then used for detailed modelling of the hydrocarbon break-up, re-deposition and re-erosion processes. The deposition patterns observed at two different poloidal locations are shown to strongly reflect the cross-field gradients in divertor plasma density and temperature, as well as the local plasma collisionality. Experimental results with forward and reversed BT, accompanied by numerical modelling, also point towards a significant poloidal hydrocarbon E×B drift in the divertor region.",

keywords = "plasma physics, tokamaks, plasma-material interactions",

author = "Leena Aho-Mantila and Markus Airila and M. Wischmeier and K. Krieger and R. Pugno and V. Rohde and D.P. Coster and A.V. Chankin and R. Neu and {ASDEX Upgrade Team}",

year = "2009",

doi = "10.1088/0031-8949/2009/T138/014019",

language = "English",

journal = "Physica Scripta",

issn = "0031-8949",

publisher = "Institute of Physics IOP",

number = "T138",

note = "12th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-12, PFMC-12 ; Conference date: 11-05-2009 Through 14-05-2009",

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TY - JOUR

T1 - Modelling of 13CH4 Injection and Local Carbon Deposition at the Outer Divertor of ASDEX Upgrade

AU - Aho-Mantila, Leena

AU - Airila, Markus

AU - Wischmeier, M.

AU - Krieger, K.

AU - Pugno, R.

AU - Rohde, V.

AU - Coster, D.P.

AU - Chankin, A.V.

AU - Neu, R.

AU - ASDEX Upgrade Team

PY - 2009

Y1 - 2009

N2 - Numerical modelling of 13CH4 injection into the outer divertor plasma of the full tungsten, vertical target of ASDEX Upgrade is presented. The SOLPS5.0 code package is used to calculate a realistic scrape-off layer plasma background corresponding to L-mode discharges in the attached divertor plasma regime. The ERO code is then used for detailed modelling of the hydrocarbon break-up, re-deposition and re-erosion processes. The deposition patterns observed at two different poloidal locations are shown to strongly reflect the cross-field gradients in divertor plasma density and temperature, as well as the local plasma collisionality. Experimental results with forward and reversed BT, accompanied by numerical modelling, also point towards a significant poloidal hydrocarbon E×B drift in the divertor region.

AB - Numerical modelling of 13CH4 injection into the outer divertor plasma of the full tungsten, vertical target of ASDEX Upgrade is presented. The SOLPS5.0 code package is used to calculate a realistic scrape-off layer plasma background corresponding to L-mode discharges in the attached divertor plasma regime. The ERO code is then used for detailed modelling of the hydrocarbon break-up, re-deposition and re-erosion processes. The deposition patterns observed at two different poloidal locations are shown to strongly reflect the cross-field gradients in divertor plasma density and temperature, as well as the local plasma collisionality. Experimental results with forward and reversed BT, accompanied by numerical modelling, also point towards a significant poloidal hydrocarbon E×B drift in the divertor region.

KW - plasma physics

KW - tokamaks

KW - plasma-material interactions

U2 - 10.1088/0031-8949/2009/T138/014019

DO - 10.1088/0031-8949/2009/T138/014019

M3 - Article

SN - 0031-8949

JO - Physica Scripta

JF - Physica Scripta

IS - T138

M1 - 014019

T2 - 12th International Workshop on Plasma-Facing Materials and Components for Fusion Applications, PFMC-12

Y2 - 11 May 2009 through 14 May 2009

ER -