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

M. Mayer; S. Krat; W. Van Renterghem; A. Baron-Wiechec; S. Brezinsek; I. Bykov; P. Coad; Yu Gasparyan; K. Heinola; Jari Likonen; A. Pisarev; C. Ruset; G. de Saint-Aubin; A. Widdowson; JET Contributors

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

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

M. Mayer (Corresponding Author), S. Krat, W. Van Renterghem, A. Baron-Wiechec, S. Brezinsek, I. Bykov, P. Coad, Yu Gasparyan, K. Heinola, Jari Likonen, A. Pisarev, C. Ruset, G. de Saint-Aubin, A. Widdowson, JET Contributors

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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
Article number	014051
Number of pages	9
Journal	Physica Scripta
Volume	2016
Issue number	T167
DOIs	https://doi.org/10.1088/0031-8949/T167/1/014051
Publication status	Published - 2016
MoE publication type	A1 Journal article-refereed

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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., & JET Contributors (2016). Erosion and deposition in the JET divertor during the first ILW campaign. Physica Scripta, 2016(T167), [014051]. 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.",

author = "M. Mayer and S. Krat and {Van Renterghem}, W. and A. Baron-Wiechec and S. Brezinsek and I. Bykov and P. Coad and Yu Gasparyan and K. Heinola and Jari Likonen and A. Pisarev and C. Ruset and {de Saint-Aubin}, G. and A. Widdowson and {JET Contributors}",

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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 & JET Contributors 2016, 'Erosion and deposition in the JET divertor during the first ILW campaign', Physica Scripta, vol. 2016, no. T167, 014051. 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, M.

AU - Krat, S.

AU - Van Renterghem, W.

AU - Baron-Wiechec, A.

AU - Brezinsek, S.

AU - Bykov, I.

AU - Coad, P.

AU - Gasparyan, Yu

AU - Heinola, K.

AU - Likonen, Jari

AU - Pisarev, A.

AU - Ruset, C.

AU - de Saint-Aubin, G.

AU - Widdowson, A.

AU - JET Contributors

N1 - Project code: 104445

PY - 2016

Y1 - 2016

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.

U2 - 10.1088/0031-8949/T167/1/014051

DO - 10.1088/0031-8949/T167/1/014051

M3 - Article

SN - 0031-8949

VL - 2016

JO - Physica Scripta

JF - Physica Scripta

IS - T167

M1 - 014051

ER -

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

Abstract

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