Studies of the influence of external hydrocarbon injection on local plasma conditions and resulting carbon transport

R. Ding; A. Kirschner; M. Z. Tokar; M. Koltunov; D. Borodin; S. Brezinsek; A. Kreter; J. L. Chen; J. G. Li; G. N. Luo

doi:10.1016/j.jnucmat.2010.09.037

Studies of the influence of external hydrocarbon injection on local plasma conditions and resulting carbon transport

R. Ding, A. Kirschner, M. Z. Tokar, M. Koltunov, D. Borodin, S. Brezinsek, A. Kreter, J. L. Chen, J. G. Li, G. N. Luo

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

6 Scopus citations

Abstract

A one-dimensional fluid model, which calculates the modification of density and temperature along the magnetic field and the parallel electrical field in the presence of local impurity sources, has been implemented into the ERO code. The influence of impurity source strength on the local plasma parameters and resulting changes in impurity transport and deposition has been studied. Dedicated TEXTOR experiments of ¹³CH₄ injection through roof-like test limiters are modelled for comparison. Modelling with high injection rates (larger than about 4 × 10¹⁸ s^-1) results in too localized light emission pattern near to the injection hole, and therefore indicates an underestimation of the reduction of electron temperature in the model. Besides, the preliminary results indicate that possible modification of local plasma conditions cannot significantly reduce the modelled ¹³C deposition and therefore cannot explain the measured low ¹³C deposition efficiency.

Original language	English
Pages (from-to)	S270-S273
Journal	Journal of Nuclear Materials
Volume	415
Issue number	1 SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2010.09.037
State	Published - 1 Aug 2011
Externally published	Yes

Bibliographical note

Funding Information:
This work has been supported by Helmholtz-CSC Fellowship and the National Nature Science Foundation of China under Contract Nos. 10775138 and 11005125 .

Funding

This work has been supported by Helmholtz-CSC Fellowship and the National Nature Science Foundation of China under Contract Nos. 10775138 and 11005125 .

Funders	Funder number
Helmholtz-CSC
National Nature Science Foundation of China	10775138, 11005125

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10.1016/j.jnucmat.2010.09.037

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title = "Studies of the influence of external hydrocarbon injection on local plasma conditions and resulting carbon transport",

abstract = "A one-dimensional fluid model, which calculates the modification of density and temperature along the magnetic field and the parallel electrical field in the presence of local impurity sources, has been implemented into the ERO code. The influence of impurity source strength on the local plasma parameters and resulting changes in impurity transport and deposition has been studied. Dedicated TEXTOR experiments of 13CH4 injection through roof-like test limiters are modelled for comparison. Modelling with high injection rates (larger than about 4 × 1018 s-1) results in too localized light emission pattern near to the injection hole, and therefore indicates an underestimation of the reduction of electron temperature in the model. Besides, the preliminary results indicate that possible modification of local plasma conditions cannot significantly reduce the modelled 13C deposition and therefore cannot explain the measured low 13C deposition efficiency.",

author = "R. Ding and A. Kirschner and Tokar, {M. Z.} and M. Koltunov and D. Borodin and S. Brezinsek and A. Kreter and Chen, {J. L.} and Li, {J. G.} and Luo, {G. N.}",

note = "Funding Information: This work has been supported by Helmholtz-CSC Fellowship and the National Nature Science Foundation of China under Contract Nos. 10775138 and 11005125 .",

year = "2011",

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day = "1",

doi = "10.1016/j.jnucmat.2010.09.037",

language = "אנגלית",

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T1 - Studies of the influence of external hydrocarbon injection on local plasma conditions and resulting carbon transport

AU - Ding, R.

AU - Kirschner, A.

AU - Tokar, M. Z.

AU - Koltunov, M.

AU - Borodin, D.

AU - Brezinsek, S.

AU - Kreter, A.

AU - Chen, J. L.

AU - Li, J. G.

AU - Luo, G. N.

N1 - Funding Information: This work has been supported by Helmholtz-CSC Fellowship and the National Nature Science Foundation of China under Contract Nos. 10775138 and 11005125 .

PY - 2011/8/1

Y1 - 2011/8/1

N2 - A one-dimensional fluid model, which calculates the modification of density and temperature along the magnetic field and the parallel electrical field in the presence of local impurity sources, has been implemented into the ERO code. The influence of impurity source strength on the local plasma parameters and resulting changes in impurity transport and deposition has been studied. Dedicated TEXTOR experiments of 13CH4 injection through roof-like test limiters are modelled for comparison. Modelling with high injection rates (larger than about 4 × 1018 s-1) results in too localized light emission pattern near to the injection hole, and therefore indicates an underestimation of the reduction of electron temperature in the model. Besides, the preliminary results indicate that possible modification of local plasma conditions cannot significantly reduce the modelled 13C deposition and therefore cannot explain the measured low 13C deposition efficiency.

AB - A one-dimensional fluid model, which calculates the modification of density and temperature along the magnetic field and the parallel electrical field in the presence of local impurity sources, has been implemented into the ERO code. The influence of impurity source strength on the local plasma parameters and resulting changes in impurity transport and deposition has been studied. Dedicated TEXTOR experiments of 13CH4 injection through roof-like test limiters are modelled for comparison. Modelling with high injection rates (larger than about 4 × 1018 s-1) results in too localized light emission pattern near to the injection hole, and therefore indicates an underestimation of the reduction of electron temperature in the model. Besides, the preliminary results indicate that possible modification of local plasma conditions cannot significantly reduce the modelled 13C deposition and therefore cannot explain the measured low 13C deposition efficiency.

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1 SUPPL

ER -

Studies of the influence of external hydrocarbon injection on local plasma conditions and resulting carbon transport

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