Hydrocarbon injection for quantification of chemical erosion yields in tokamaks

S. Brezinsek; A. Pospieszczyk; D. Borodin; M. F. Stamp; R. Pugno; A. G. McLean; U. Fantz; A. Manhard; A. Kallenbach; N. H. Brooks; M. Groth; Ph Mertens; V. Philipps; U. Samm

doi:10.1016/j.jnucmat.2007.01.190

Hydrocarbon injection for quantification of chemical erosion yields in tokamaks

S. Brezinsek, A. Pospieszczyk, D. Borodin, M. F. Stamp, R. Pugno, A. G. McLean, U. Fantz, A. Manhard, A. Kallenbach, N. H. Brooks, M. Groth, Ph Mertens, V. Philipps, U. Samm

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Abstract

Chemical erosion of carbon can be described as function of the incident ion flux, the ion energy and the surface temperature. Spectroscopy on the hydrocarbon break-up products CH and C₂ is applied to determine in-situ hydrocarbon fluxes and quantify the chemical erosion by means of hydrocarbon injection. Present-day knowledge on critical issues concerning the erosion yield and its determination is presented: Effective inverse photon efficiencies are measured in TEXTOR for different hydrocarbon species and compared with calculations from HYDKIN. The underlying database for the methane break-up, used in different erosion/deposition models, has been put to test. The chemical erosion yield related to higher hydrocarbons is determined to be lower in the JET outer divertor than measured in previous experiments. In ASDEX Upgrade and DIII-D first in-situ calibrations of hydrocarbon fluxes in the detached outer divertor are performed.

Original language	English
Pages (from-to)	1119-1128
Number of pages	10
Journal	Journal of Nuclear Materials
Volume	363-365
Issue number	1-3
DOIs	https://doi.org/10.1016/j.jnucmat.2007.01.190
State	Published - 15 Jun 2007
Externally published	Yes

Keywords

Carbon impurities
Divertor
Erosion and deposition
ITER
Spectroscopy

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10.1016/j.jnucmat.2007.01.190

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Brezinsek, S., Pospieszczyk, A., Borodin, D., Stamp, M. F., Pugno, R., McLean, A. G., Fantz, U., Manhard, A., Kallenbach, A., Brooks, N. H., Groth, M., Mertens, P., Philipps, V., & Samm, U. (2007). Hydrocarbon injection for quantification of chemical erosion yields in tokamaks. Journal of Nuclear Materials, 363-365(1-3), 1119-1128. https://doi.org/10.1016/j.jnucmat.2007.01.190

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title = "Hydrocarbon injection for quantification of chemical erosion yields in tokamaks",

abstract = "Chemical erosion of carbon can be described as function of the incident ion flux, the ion energy and the surface temperature. Spectroscopy on the hydrocarbon break-up products CH and C2 is applied to determine in-situ hydrocarbon fluxes and quantify the chemical erosion by means of hydrocarbon injection. Present-day knowledge on critical issues concerning the erosion yield and its determination is presented: Effective inverse photon efficiencies are measured in TEXTOR for different hydrocarbon species and compared with calculations from HYDKIN. The underlying database for the methane break-up, used in different erosion/deposition models, has been put to test. The chemical erosion yield related to higher hydrocarbons is determined to be lower in the JET outer divertor than measured in previous experiments. In ASDEX Upgrade and DIII-D first in-situ calibrations of hydrocarbon fluxes in the detached outer divertor are performed.",

keywords = "Carbon impurities, Divertor, Erosion and deposition, ITER, Spectroscopy",

author = "S. Brezinsek and A. Pospieszczyk and D. Borodin and Stamp, {M. F.} and R. Pugno and McLean, {A. G.} and U. Fantz and A. Manhard and A. Kallenbach and Brooks, {N. H.} and M. Groth and Ph Mertens and V. Philipps and U. Samm",

year = "2007",

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doi = "10.1016/j.jnucmat.2007.01.190",

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journal = "Journal of Nuclear Materials",

issn = "0022-3115",

publisher = "Elsevier B.V.",

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Brezinsek, S, Pospieszczyk, A, Borodin, D, Stamp, MF, Pugno, R, McLean, AG, Fantz, U, Manhard, A, Kallenbach, A, Brooks, NH, Groth, M, Mertens, P, Philipps, V & Samm, U 2007, 'Hydrocarbon injection for quantification of chemical erosion yields in tokamaks', Journal of Nuclear Materials, vol. 363-365, no. 1-3, pp. 1119-1128. https://doi.org/10.1016/j.jnucmat.2007.01.190

TY - JOUR

T1 - Hydrocarbon injection for quantification of chemical erosion yields in tokamaks

AU - Brezinsek, S.

AU - Pospieszczyk, A.

AU - Borodin, D.

AU - Stamp, M. F.

AU - Pugno, R.

AU - McLean, A. G.

AU - Fantz, U.

AU - Manhard, A.

AU - Kallenbach, A.

AU - Brooks, N. H.

AU - Groth, M.

AU - Mertens, Ph

AU - Philipps, V.

AU - Samm, U.

PY - 2007/6/15

Y1 - 2007/6/15

N2 - Chemical erosion of carbon can be described as function of the incident ion flux, the ion energy and the surface temperature. Spectroscopy on the hydrocarbon break-up products CH and C2 is applied to determine in-situ hydrocarbon fluxes and quantify the chemical erosion by means of hydrocarbon injection. Present-day knowledge on critical issues concerning the erosion yield and its determination is presented: Effective inverse photon efficiencies are measured in TEXTOR for different hydrocarbon species and compared with calculations from HYDKIN. The underlying database for the methane break-up, used in different erosion/deposition models, has been put to test. The chemical erosion yield related to higher hydrocarbons is determined to be lower in the JET outer divertor than measured in previous experiments. In ASDEX Upgrade and DIII-D first in-situ calibrations of hydrocarbon fluxes in the detached outer divertor are performed.

AB - Chemical erosion of carbon can be described as function of the incident ion flux, the ion energy and the surface temperature. Spectroscopy on the hydrocarbon break-up products CH and C2 is applied to determine in-situ hydrocarbon fluxes and quantify the chemical erosion by means of hydrocarbon injection. Present-day knowledge on critical issues concerning the erosion yield and its determination is presented: Effective inverse photon efficiencies are measured in TEXTOR for different hydrocarbon species and compared with calculations from HYDKIN. The underlying database for the methane break-up, used in different erosion/deposition models, has been put to test. The chemical erosion yield related to higher hydrocarbons is determined to be lower in the JET outer divertor than measured in previous experiments. In ASDEX Upgrade and DIII-D first in-situ calibrations of hydrocarbon fluxes in the detached outer divertor are performed.

KW - Carbon impurities

KW - Divertor

KW - Erosion and deposition

KW - ITER

KW - Spectroscopy

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VL - 363-365

SP - 1119

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JO - Journal of Nuclear Materials

JF - Journal of Nuclear Materials

IS - 1-3

ER -

Hydrocarbon injection for quantification of chemical erosion yields in tokamaks

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Keywords

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