Erosion and deposition in the JET divertor during the first ILW campaign

Matej Mayer; Stepan Krat; Wouter Van Renterghem; Aleksandra Baron-Wiechec; Sebastijan Brezinsek; Igor Bykov; Paul Coad; Yuri Gasparyan; Kalle Heinola; Jari Likonen; Alexander Pisarev; Christian Ruset; G. de Saint-Aubin; Anna Widdowson

doi:10.1088/0031-8949/T167/1/014051

Erosion and deposition in the JET divertor during the first ILW campaign

Matej Mayer, Stepan Krat, Wouter Van Renterghem, Aleksandra Baron-Wiechec, Sebastijan Brezinsek, Igor Bykov, Paul Coad, Yuri Gasparyan, Kalle Heinola, Jari Likonen, Alexander Pisarev, Christian Ruset, G. de Saint-Aubin, Anna Widdowson

Research output › peer-review

Abstract

Erosion and deposition were studied in the JET divertor during the first JET ITER-like wall campaign 2011 to 2012 using marker tiles. An almost complete poloidal section consisting of tiles 0, 1, 3, 4, 6, 7, 8 was studied. The data from divertor tile surfaces were completed by the analysis of samples from remote divertor areas and from the inner wall cladding. The total mass of material deposited in the divertor decreased by a factor of 4–9 compared to the deposition of carbon during all-carbon JET operation before 2010. Deposits in 2011 to 2012 consist mainly of beryllium with 5–20 at.% of carbon and oxygen, respectively, and small amounts of Ni, Cr, Fe and W. This decrease of material deposition in the divertor is accompanied by a decrease of total deuterium retention inside the JET vessel by a factor of 10 to 20. The detailed erosion/deposition pattern in the divertor with the ITER-like wall configuration shows rigorous changes compared to the pattern with the all-carbon JET configuration.

Original language	English
Title of host publication	https://iopscience.iop.org/journal/1402-4896
Number of pages	9
Volume	T167
DOIs	https://doi.org/10.1088/0031-8949/T167/1/014051
State	Published - 21 Jan 2016

Publication series

Name	Physica Scripta
Publisher	IOP - IOP Publishing
ISSN (Print)	0031-8949

Access to Document

10.1088/0031-8949/T167/1/014051License: Unspecified

Cite this

Mayer, M., Krat, S., Van Renterghem, W., Baron-Wiechec, A., Brezinsek, S., Bykov, I., Coad, P., Gasparyan, Y., Heinola, K., Likonen, J., Pisarev, A., Ruset, C., de Saint-Aubin, G., & Widdowson, A. (2016). Erosion and deposition in the JET divertor during the first ILW campaign. In https://iopscience.iop.org/journal/1402-4896 (Vol. T167). (Physica Scripta). https://doi.org/10.1088/0031-8949/T167/1/014051

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title = "Erosion and deposition in the JET divertor during the first ILW campaign",

abstract = "Erosion and deposition were studied in the JET divertor during the first JET ITER-like wall campaign 2011 to 2012 using marker tiles. An almost complete poloidal section consisting of tiles 0, 1, 3, 4, 6, 7, 8 was studied. The data from divertor tile surfaces were completed by the analysis of samples from remote divertor areas and from the inner wall cladding. The total mass of material deposited in the divertor decreased by a factor of 4–9 compared to the deposition of carbon during all-carbon JET operation before 2010. Deposits in 2011 to 2012 consist mainly of beryllium with 5–20 at.% of carbon and oxygen, respectively, and small amounts of Ni, Cr, Fe and W. This decrease of material deposition in the divertor is accompanied by a decrease of total deuterium retention inside the JET vessel by a factor of 10 to 20. The detailed erosion/deposition pattern in the divertor with the ITER-like wall configuration shows rigorous changes compared to the pattern with the all-carbon JET configuration.",

keywords = "JET-ILW, material erosion, material deposition, surface analysis, divertor",

author = "Matej Mayer and Stepan Krat and {Van Renterghem}, Wouter and Aleksandra Baron-Wiechec and Sebastijan Brezinsek and Igor Bykov and Paul Coad and Yuri Gasparyan and Kalle Heinola and Jari Likonen and Alexander Pisarev and Christian Ruset and {de Saint-Aubin}, G. and Anna Widdowson",

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Mayer, M, Krat, S, Van Renterghem, W, Baron-Wiechec, A, Brezinsek, S, Bykov, I, Coad, P, Gasparyan, Y, Heinola, K, Likonen, J, Pisarev, A, Ruset, C, de Saint-Aubin, G & Widdowson, A 2016, Erosion and deposition in the JET divertor during the first ILW campaign. in https://iopscience.iop.org/journal/1402-4896. vol. T167, Physica Scripta. https://doi.org/10.1088/0031-8949/T167/1/014051

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T1 - Erosion and deposition in the JET divertor during the first ILW campaign

AU - Mayer, Matej

AU - Krat, Stepan

AU - Van Renterghem, Wouter

AU - Baron-Wiechec, Aleksandra

AU - Brezinsek, Sebastijan

AU - Bykov, Igor

AU - Coad, Paul

AU - Gasparyan, Yuri

AU - Heinola, Kalle

AU - Likonen, Jari

AU - Pisarev, Alexander

AU - Ruset, Christian

AU - de Saint-Aubin, G.

AU - Widdowson, Anna

N1 - Score=3

PY - 2016/1/21

Y1 - 2016/1/21

N2 - Erosion and deposition were studied in the JET divertor during the first JET ITER-like wall campaign 2011 to 2012 using marker tiles. An almost complete poloidal section consisting of tiles 0, 1, 3, 4, 6, 7, 8 was studied. The data from divertor tile surfaces were completed by the analysis of samples from remote divertor areas and from the inner wall cladding. The total mass of material deposited in the divertor decreased by a factor of 4–9 compared to the deposition of carbon during all-carbon JET operation before 2010. Deposits in 2011 to 2012 consist mainly of beryllium with 5–20 at.% of carbon and oxygen, respectively, and small amounts of Ni, Cr, Fe and W. This decrease of material deposition in the divertor is accompanied by a decrease of total deuterium retention inside the JET vessel by a factor of 10 to 20. The detailed erosion/deposition pattern in the divertor with the ITER-like wall configuration shows rigorous changes compared to the pattern with the all-carbon JET configuration.

AB - Erosion and deposition were studied in the JET divertor during the first JET ITER-like wall campaign 2011 to 2012 using marker tiles. An almost complete poloidal section consisting of tiles 0, 1, 3, 4, 6, 7, 8 was studied. The data from divertor tile surfaces were completed by the analysis of samples from remote divertor areas and from the inner wall cladding. The total mass of material deposited in the divertor decreased by a factor of 4–9 compared to the deposition of carbon during all-carbon JET operation before 2010. Deposits in 2011 to 2012 consist mainly of beryllium with 5–20 at.% of carbon and oxygen, respectively, and small amounts of Ni, Cr, Fe and W. This decrease of material deposition in the divertor is accompanied by a decrease of total deuterium retention inside the JET vessel by a factor of 10 to 20. The detailed erosion/deposition pattern in the divertor with the ITER-like wall configuration shows rigorous changes compared to the pattern with the all-carbon JET configuration.

KW - JET-ILW

KW - material erosion

KW - material deposition

KW - surface analysis

KW - divertor

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