Carbon transport and escape fraction in a high density plasma beam

G. A. Van Swaaij; K. Bystrov; D. Borodin; A. Kirschner; T. Zaharia; L. B. Van Der Vegt; G. De Temmerman; W. J. Goedheer

doi:10.1016/j.jnucmat.2013.01.132

Carbon transport and escape fraction in a high density plasma beam

G. A. Van Swaaij, K. Bystrov, D. Borodin, A. Kirschner, T. Zaharia, L. B. Van Der Vegt, G. De Temmerman, W. J. Goedheer

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

4 Scopus citations

Abstract

Hydrocarbon injection experiments on molybdenum targets facing high-density plasmas in Pilot-PSI were simulated with the 3D Monte Carlo impurity transport and PSI code ERO. Impurity transport and calculation of redeposition profiles were decoupled by calculating carbon redistribution matrices with ERO. Redeposition was found to be strongly dependent on the electron density: greater densities result in a much more localized redeposition pattern. The calculated average number of recycling events of hydrocarbon molecules on the surface went up from 1.5 for n_e = 5 × 10¹⁹ mr^-3 to 19.2 for n_e = 4 × 10²⁰ mr³; at the latter density, only 2.4% of the hydrocarbon molecules escapes the simulated plasma beam without returning to the target at least once. Agreement with experimental deposition profiles in argon was fair. The results in hydrogen point towards a strong gradient in chemical erosion yield along the target.

Original language	English
Pages (from-to)	S629-S632
Journal	Journal of Nuclear Materials
Volume	438
Issue number	SUPPL
DOIs	https://doi.org/10.1016/j.jnucmat.2013.01.132
State	Published - 2013
Externally published	Yes

Bibliographical note

Funding Information:
This work, supported by the European Communities under the contract of Association between EURATOM/FOM, was carried out within the framework of the European Fusion Programme with financial support from NWO. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funding

This work, supported by the European Communities under the contract of Association between EURATOM/FOM, was carried out within the framework of the European Fusion Programme with financial support from NWO. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

Funders	Funder number
EURATOM/FOM
Nederlandse Organisatie voor Wetenschappelijk Onderzoek

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10.1016/j.jnucmat.2013.01.132

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title = "Carbon transport and escape fraction in a high density plasma beam",

abstract = "Hydrocarbon injection experiments on molybdenum targets facing high-density plasmas in Pilot-PSI were simulated with the 3D Monte Carlo impurity transport and PSI code ERO. Impurity transport and calculation of redeposition profiles were decoupled by calculating carbon redistribution matrices with ERO. Redeposition was found to be strongly dependent on the electron density: greater densities result in a much more localized redeposition pattern. The calculated average number of recycling events of hydrocarbon molecules on the surface went up from 1.5 for ne = 5 × 1019 mr-3 to 19.2 for ne = 4 × 1020 mr3; at the latter density, only 2.4% of the hydrocarbon molecules escapes the simulated plasma beam without returning to the target at least once. Agreement with experimental deposition profiles in argon was fair. The results in hydrogen point towards a strong gradient in chemical erosion yield along the target.",

author = "{Van Swaaij}, {G. A.} and K. Bystrov and D. Borodin and A. Kirschner and T. Zaharia and {Van Der Vegt}, {L. B.} and {De Temmerman}, G. and Goedheer, {W. J.}",

note = "Funding Information: This work, supported by the European Communities under the contract of Association between EURATOM/FOM, was carried out within the framework of the European Fusion Programme with financial support from NWO. The views and opinions expressed herein do not necessarily reflect those of the European Commission. ",

year = "2013",

doi = "10.1016/j.jnucmat.2013.01.132",

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AU - Van Swaaij, G. A.

AU - Bystrov, K.

AU - Borodin, D.

AU - Kirschner, A.

AU - Zaharia, T.

AU - Van Der Vegt, L. B.

AU - De Temmerman, G.

AU - Goedheer, W. J.

N1 - Funding Information: This work, supported by the European Communities under the contract of Association between EURATOM/FOM, was carried out within the framework of the European Fusion Programme with financial support from NWO. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

PY - 2013

Y1 - 2013

N2 - Hydrocarbon injection experiments on molybdenum targets facing high-density plasmas in Pilot-PSI were simulated with the 3D Monte Carlo impurity transport and PSI code ERO. Impurity transport and calculation of redeposition profiles were decoupled by calculating carbon redistribution matrices with ERO. Redeposition was found to be strongly dependent on the electron density: greater densities result in a much more localized redeposition pattern. The calculated average number of recycling events of hydrocarbon molecules on the surface went up from 1.5 for ne = 5 × 1019 mr-3 to 19.2 for ne = 4 × 1020 mr3; at the latter density, only 2.4% of the hydrocarbon molecules escapes the simulated plasma beam without returning to the target at least once. Agreement with experimental deposition profiles in argon was fair. The results in hydrogen point towards a strong gradient in chemical erosion yield along the target.

AB - Hydrocarbon injection experiments on molybdenum targets facing high-density plasmas in Pilot-PSI were simulated with the 3D Monte Carlo impurity transport and PSI code ERO. Impurity transport and calculation of redeposition profiles were decoupled by calculating carbon redistribution matrices with ERO. Redeposition was found to be strongly dependent on the electron density: greater densities result in a much more localized redeposition pattern. The calculated average number of recycling events of hydrocarbon molecules on the surface went up from 1.5 for ne = 5 × 1019 mr-3 to 19.2 for ne = 4 × 1020 mr3; at the latter density, only 2.4% of the hydrocarbon molecules escapes the simulated plasma beam without returning to the target at least once. Agreement with experimental deposition profiles in argon was fair. The results in hydrogen point towards a strong gradient in chemical erosion yield along the target.

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Carbon transport and escape fraction in a high density plasma beam

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