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Title: Design and Test of Wendelstein 7-X Water-Cooled Divertor Scraper

Abstract

Heat load calculations have indicated the possible overloading of the ends of the water-cooled divertor facing the pumping gap beyond their technological limit. The intention of the scraper is the interception of some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper is divided into six modules of four plasma facing components (PFCs); each module has four PFCs hydraulically connected in series by two water boxes (inlet and outlet). A full-scale prototype of one module has been manufactured. Development activities have been carried out to connect the water boxes to the cooling pipes of the PFCs by tungsten inert gas internal orbital welding. This prototype was successfully tested in the GLADIS facility with 17 MW/m2 for 500 cycles. The results of these activities have confirmed the possible technological basis for a fabrication of the water-cooled scraper.

Authors:
 [1];  [2];  [3];  [2];  [2];  [4]; ORCiD logo [5];  [2];  [2];  [2]; ORCiD logo [5]; ORCiD logo [5];  [6]
  1. Max-Planck-Institut fur Plasmaphysik, EURATOM Association, Garching, Germany
  2. Max Planck Institute for Plasma Physics, Garching, Germany
  3. Max Planck Institute of Plasma Physics, Greifswald, Germany
  4. The University of Tennessee, Knoxville
  5. ORNL
  6. Max-Planck-Institut fur Plasmaphysik, Griefswald, Germany
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1437897
DOE Contract Number:  
AC05-00OR22725
Resource Type:
Conference
Resource Relation:
Journal Volume: 46; Journal Issue: 5; Conference: Symposium on Fusion Engineering - Shanghai, , China - 6/4/2017 4:00:00 AM-6/8/2017 4:00:00 AM
Country of Publication:
United States
Language:
English

Citation Formats

Boscary, J., Greuner, Henri, Ehrke, Gunnar, Boeswirth, Bernd, Wang, Zhongwei, Clark, Emily, Lumsdaine, Arnold, Tretter, Jorg, Junghanns, Patrick, Stadler, Reinhold, McGinnis, William Dean, Lore, Jeremy D., and Team, W7-X. Design and Test of Wendelstein 7-X Water-Cooled Divertor Scraper. United States: N. p., 2018. Web. doi:10.1109/TPS.2018.2804660.
Boscary, J., Greuner, Henri, Ehrke, Gunnar, Boeswirth, Bernd, Wang, Zhongwei, Clark, Emily, Lumsdaine, Arnold, Tretter, Jorg, Junghanns, Patrick, Stadler, Reinhold, McGinnis, William Dean, Lore, Jeremy D., & Team, W7-X. Design and Test of Wendelstein 7-X Water-Cooled Divertor Scraper. United States. doi:10.1109/TPS.2018.2804660.
Boscary, J., Greuner, Henri, Ehrke, Gunnar, Boeswirth, Bernd, Wang, Zhongwei, Clark, Emily, Lumsdaine, Arnold, Tretter, Jorg, Junghanns, Patrick, Stadler, Reinhold, McGinnis, William Dean, Lore, Jeremy D., and Team, W7-X. Sun . "Design and Test of Wendelstein 7-X Water-Cooled Divertor Scraper". United States. doi:10.1109/TPS.2018.2804660. https://www.osti.gov/servlets/purl/1437897.
@article{osti_1437897,
title = {Design and Test of Wendelstein 7-X Water-Cooled Divertor Scraper},
author = {Boscary, J. and Greuner, Henri and Ehrke, Gunnar and Boeswirth, Bernd and Wang, Zhongwei and Clark, Emily and Lumsdaine, Arnold and Tretter, Jorg and Junghanns, Patrick and Stadler, Reinhold and McGinnis, William Dean and Lore, Jeremy D. and Team, W7-X},
abstractNote = {Heat load calculations have indicated the possible overloading of the ends of the water-cooled divertor facing the pumping gap beyond their technological limit. The intention of the scraper is the interception of some of the plasma fluxes both upstream and downstream before they reach the divertor surface. The scraper is divided into six modules of four plasma facing components (PFCs); each module has four PFCs hydraulically connected in series by two water boxes (inlet and outlet). A full-scale prototype of one module has been manufactured. Development activities have been carried out to connect the water boxes to the cooling pipes of the PFCs by tungsten inert gas internal orbital welding. This prototype was successfully tested in the GLADIS facility with 17 MW/m2 for 500 cycles. The results of these activities have confirmed the possible technological basis for a fabrication of the water-cooled scraper.},
doi = {10.1109/TPS.2018.2804660},
journal = {},
issn = {0093--3813},
number = 5,
volume = 46,
place = {United States},
year = {2018},
month = {4}
}

Conference:
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