Prototyping phase of the high heat flux scraper element of Wendelstein 7-X

J. Boscary; H. Greuner; G. Ehrke; B. Böswirth; Z. Wang; E. Clark; A. Lumsdaine; J. Tretter; D. McGinnis; J. Lore; K. Ekici

doi:10.1016/j.fusengdes.2016.02.001

Prototyping phase of the high heat flux scraper element of Wendelstein 7-X

J. Boscary, H. Greuner, G. Ehrke, B. Böswirth, Z. Wang, E. Clark, A. Lumsdaine, J. Tretter, D. McGinnis, J. Lore, K. Ekici

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

9 Scopus citations

Abstract

The water-cooled high heat flux scraper element aims to reduce excessive heat loads on the target element ends of the actively cooled divertor of Wendelstein 7-X. Its purpose is to intercept some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper element has 24 identical plasma facing components (PFCs) divided into 6 modules. One module has 4 PFCs hydraulically connected in series by 2 water boxes. A PFC, 247 mm long and 28 mm wide, has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. 4 full-scale prototypes of PFCs have been successfully tested in the GLADIS facility up to 20 MW/m². The difference observed between measured and calculated surface temperatures is probably due to the inhomogeneity of CFC properties. The design of the water box prototypes has been detailed to allow the junction between the cooling pipe of the PFCs and the water boxes by internal orbital welding. The prototypes are presently under fabrication.

Original language	English
Pages (from-to)	773-776
Number of pages	4
Journal	Fusion Engineering and Design
Volume	109-111
DOIs	https://doi.org/10.1016/j.fusengdes.2016.02.001
State	Published - Nov 1 2016

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

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1016/j.fusengdes.2016.02.001

Cite this

@article{b1b9d01bf6ce49b1b571b7baacaf8386,

title = "Prototyping phase of the high heat flux scraper element of Wendelstein 7-X",

abstract = "The water-cooled high heat flux scraper element aims to reduce excessive heat loads on the target element ends of the actively cooled divertor of Wendelstein 7-X. Its purpose is to intercept some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper element has 24 identical plasma facing components (PFCs) divided into 6 modules. One module has 4 PFCs hydraulically connected in series by 2 water boxes. A PFC, 247 mm long and 28 mm wide, has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. 4 full-scale prototypes of PFCs have been successfully tested in the GLADIS facility up to 20 MW/m2. The difference observed between measured and calculated surface temperatures is probably due to the inhomogeneity of CFC properties. The design of the water box prototypes has been detailed to allow the junction between the cooling pipe of the PFCs and the water boxes by internal orbital welding. The prototypes are presently under fabrication.",

keywords = "Divertor, Monoblock, Plasma facing component, Stellarator, Wendelstein 7-X",

author = "J. Boscary and H. Greuner and G. Ehrke and B. B{\"o}swirth and Z. Wang and E. Clark and A. Lumsdaine and J. Tretter and D. McGinnis and J. Lore and K. Ekici",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier B.V.",

year = "2016",

month = nov,

day = "1",

doi = "10.1016/j.fusengdes.2016.02.001",

language = "English",

volume = "109-111",

pages = "773--776",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier",

}

TY - JOUR

T1 - Prototyping phase of the high heat flux scraper element of Wendelstein 7-X

AU - Boscary, J.

AU - Greuner, H.

AU - Ehrke, G.

AU - Böswirth, B.

AU - Wang, Z.

AU - Clark, E.

AU - Lumsdaine, A.

AU - Tretter, J.

AU - McGinnis, D.

AU - Lore, J.

AU - Ekici, K.

PY - 2016/11/1

Y1 - 2016/11/1

N2 - The water-cooled high heat flux scraper element aims to reduce excessive heat loads on the target element ends of the actively cooled divertor of Wendelstein 7-X. Its purpose is to intercept some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper element has 24 identical plasma facing components (PFCs) divided into 6 modules. One module has 4 PFCs hydraulically connected in series by 2 water boxes. A PFC, 247 mm long and 28 mm wide, has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. 4 full-scale prototypes of PFCs have been successfully tested in the GLADIS facility up to 20 MW/m2. The difference observed between measured and calculated surface temperatures is probably due to the inhomogeneity of CFC properties. The design of the water box prototypes has been detailed to allow the junction between the cooling pipe of the PFCs and the water boxes by internal orbital welding. The prototypes are presently under fabrication.

AB - The water-cooled high heat flux scraper element aims to reduce excessive heat loads on the target element ends of the actively cooled divertor of Wendelstein 7-X. Its purpose is to intercept some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper element has 24 identical plasma facing components (PFCs) divided into 6 modules. One module has 4 PFCs hydraulically connected in series by 2 water boxes. A PFC, 247 mm long and 28 mm wide, has 13 monoblocks made of CFC NB31 bonded by hot isostatic pressing onto a CuCrZr cooling tube equipped with a copper twisted tape. 4 full-scale prototypes of PFCs have been successfully tested in the GLADIS facility up to 20 MW/m2. The difference observed between measured and calculated surface temperatures is probably due to the inhomogeneity of CFC properties. The design of the water box prototypes has been detailed to allow the junction between the cooling pipe of the PFCs and the water boxes by internal orbital welding. The prototypes are presently under fabrication.

KW - Divertor

KW - Monoblock

KW - Plasma facing component

KW - Stellarator

KW - Wendelstein 7-X

UR - http://www.scopus.com/inward/record.url?scp=84977107043&partnerID=8YFLogxK

U2 - 10.1016/j.fusengdes.2016.02.001

DO - 10.1016/j.fusengdes.2016.02.001

M3 - Article

AN - SCOPUS:84977107043

SN - 0920-3796

VL - 109-111

SP - 773

EP - 776

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Prototyping phase of the high heat flux scraper element of Wendelstein 7-X

Abstract

Funding

Keywords

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this