Development activities of the high heat flux scraper element

J. Boscary; J. Lore; A. Lumsdaine; M. Maier; D. McGinnis; A. Peacock; J. Tretter

doi:10.1016/j.fusengdes.2014.12.019

Development activities of the high heat flux scraper element

J. Boscary, J. Lore, A. Lumsdaine, M. Maier, D. McGinnis, A. Peacock, J. Tretter

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

7 Scopus citations

Abstract

The function of the high heat flux scraper element is to reduce the heat loads on the element ends of the actively cooled divertor of Wendelstein 7-X. The scraper element is actively water cooled to remove up to 550 kW steady state power load, with localized heat fluxes as high as 20 MW/m². Its surface area, 0.17 m², is contoured to optimally intercept both upstream and downstream particle fluxes. The plasma facing surface is made of 24 individual scraper fingers based on the monoblock technology. Each scraper finger is 247 mm long and 28 mm wide and has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. Development activities, described here, include the design and fabrication of prototypes to validate the different technologies selected for the scraper element design to prepare a possible production.

Original language	English
Pages (from-to)	1231-1234
Number of pages	4
Journal	Fusion Engineering and Design
Volume	98-99
DOIs	https://doi.org/10.1016/j.fusengdes.2014.12.019
State	Published - Oct 1 2015

Funding

This work was supported by the Federal Ministry of Education and Research of the Federal Republic of Germany under grant 03FUS0014A . Only the authors are responsible for the content of this publication.

Keywords

Divertor
Monoblock
Plasma facing component
Stellarator
Wendelstein 7-X

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10.1016/j.fusengdes.2014.12.019

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abstract = "The function of the high heat flux scraper element is to reduce the heat loads on the element ends of the actively cooled divertor of Wendelstein 7-X. The scraper element is actively water cooled to remove up to 550 kW steady state power load, with localized heat fluxes as high as 20 MW/m2. Its surface area, 0.17 m2, is contoured to optimally intercept both upstream and downstream particle fluxes. The plasma facing surface is made of 24 individual scraper fingers based on the monoblock technology. Each scraper finger is 247 mm long and 28 mm wide and has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. Development activities, described here, include the design and fabrication of prototypes to validate the different technologies selected for the scraper element design to prepare a possible production.",

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AU - Boscary, J.

AU - Lore, J.

AU - Lumsdaine, A.

AU - Maier, M.

AU - McGinnis, D.

AU - Peacock, A.

AU - Tretter, J.

PY - 2015/10/1

Y1 - 2015/10/1

N2 - The function of the high heat flux scraper element is to reduce the heat loads on the element ends of the actively cooled divertor of Wendelstein 7-X. The scraper element is actively water cooled to remove up to 550 kW steady state power load, with localized heat fluxes as high as 20 MW/m2. Its surface area, 0.17 m2, is contoured to optimally intercept both upstream and downstream particle fluxes. The plasma facing surface is made of 24 individual scraper fingers based on the monoblock technology. Each scraper finger is 247 mm long and 28 mm wide and has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. Development activities, described here, include the design and fabrication of prototypes to validate the different technologies selected for the scraper element design to prepare a possible production.

AB - The function of the high heat flux scraper element is to reduce the heat loads on the element ends of the actively cooled divertor of Wendelstein 7-X. The scraper element is actively water cooled to remove up to 550 kW steady state power load, with localized heat fluxes as high as 20 MW/m2. Its surface area, 0.17 m2, is contoured to optimally intercept both upstream and downstream particle fluxes. The plasma facing surface is made of 24 individual scraper fingers based on the monoblock technology. Each scraper finger is 247 mm long and 28 mm wide and has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. Development activities, described here, include the design and fabrication of prototypes to validate the different technologies selected for the scraper element design to prepare a possible production.

KW - Divertor

KW - Monoblock

KW - Plasma facing component

KW - Stellarator

KW - Wendelstein 7-X

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VL - 98-99

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JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Development activities of the high heat flux scraper element

Abstract

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Keywords

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