Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device
The toroidal distribution of boron deposition on plasma-facing components (PFCs) in boron powder injection using an impurity power dropper (IPD) was investigated by full-torus simulation and observations in a systematic plasma density-scan experiment. The images of the ablation of dropped boron powd...
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Elsevier
2024-12-01
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| Series: | Nuclear Materials and Energy |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2352179124002266 |
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| author | M. Shoji G. Kawamura R. Smirnov J. Romazanov A. Kirschner Y. Tanaka S. Masuzaki T. Kawate F. Nespoli R. Lunsford E.P. Gilson S. Brezinsek N.A. Pablant |
| author_facet | M. Shoji G. Kawamura R. Smirnov J. Romazanov A. Kirschner Y. Tanaka S. Masuzaki T. Kawate F. Nespoli R. Lunsford E.P. Gilson S. Brezinsek N.A. Pablant |
| author_sort | M. Shoji |
| collection | DOAJ |
| description | The toroidal distribution of boron deposition on plasma-facing components (PFCs) in boron powder injection using an impurity power dropper (IPD) was investigated by full-torus simulation and observations in a systematic plasma density-scan experiment. The images of the ablation of dropped boron powders observed with a visible CCD camera were consistently explained by the simulations of the ablation positions of the boron powders considering the size distribution. Simulations assuming full-torus boron deposition on the PFCs did not reproduce the observed intensity profile of boron emission lines for higher plasma densities. It indicated that the density of boron deposited on PFCs installed toroidally far from the IPD was low for higher plasma densities due to the change in the ablation positions of the boron powders toward the outboard side. The experimental results verified the previous full-torus simulation of the toroidal distribution of the boron deposition in both lower and higher plasma densities. |
| format | Article |
| id | doaj-art-9dc8bfd21b3a4e9c94efd99a897e9bd1 |
| institution | OA Journals |
| issn | 2352-1791 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Nuclear Materials and Energy |
| spelling | doaj-art-9dc8bfd21b3a4e9c94efd99a897e9bd12025-08-20T02:34:59ZengElsevierNuclear Materials and Energy2352-17912024-12-014110180310.1016/j.nme.2024.101803Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical DeviceM. Shoji0G. Kawamura1R. Smirnov2J. Romazanov3A. Kirschner4Y. Tanaka5S. Masuzaki6T. Kawate7F. Nespoli8R. Lunsford9E.P. Gilson10S. Brezinsek11N.A. Pablant12National Institute for Fusion Science, National Institutes of Natural Sciences, Oroshi-cho, Toki, Gifu 509-5292 Japan; The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0913, Japan; Corresponding author.National Institute for Fusion Science, National Institutes of Natural Sciences, Oroshi-cho, Toki, Gifu 509-5292 Japan; National Institutes for Quantum Science and Technology, Rokkasyo Institute for Fusion Energy, Rokkasho-mura, Aomori 039-3212, JapanDepartment of Mechanical and Aerospace Engineering, University of California at San Diego, La Jolla, CA 92093, USAForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich 52425, GermanyForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich 52425, GermanyInstitute of Science and Engineering, Kanazawa University, Kakuma, Kanazawa 920-1192, JapanNational Institute for Fusion Science, National Institutes of Natural Sciences, Oroshi-cho, Toki, Gifu 509-5292 Japan; The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0913, JapanNational Institute for Fusion Science, National Institutes of Natural Sciences, Oroshi-cho, Toki, Gifu 509-5292 Japan; The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama, Kanagawa 240-0913, JapanPrinceton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, USAPrinceton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, USAPrinceton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, USAForschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich 52425, GermanyPrinceton Plasma Physics Laboratory, 100 Stellarator Road, Princeton, NJ 08540, USAThe toroidal distribution of boron deposition on plasma-facing components (PFCs) in boron powder injection using an impurity power dropper (IPD) was investigated by full-torus simulation and observations in a systematic plasma density-scan experiment. The images of the ablation of dropped boron powders observed with a visible CCD camera were consistently explained by the simulations of the ablation positions of the boron powders considering the size distribution. Simulations assuming full-torus boron deposition on the PFCs did not reproduce the observed intensity profile of boron emission lines for higher plasma densities. It indicated that the density of boron deposited on PFCs installed toroidally far from the IPD was low for higher plasma densities due to the change in the ablation positions of the boron powders toward the outboard side. The experimental results verified the previous full-torus simulation of the toroidal distribution of the boron deposition in both lower and higher plasma densities.http://www.sciencedirect.com/science/article/pii/S2352179124002266Impurity powder dropperERO2.0DUSTTEMC3-EIRENELHDBoronization |
| spellingShingle | M. Shoji G. Kawamura R. Smirnov J. Romazanov A. Kirschner Y. Tanaka S. Masuzaki T. Kawate F. Nespoli R. Lunsford E.P. Gilson S. Brezinsek N.A. Pablant Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device Nuclear Materials and Energy Impurity powder dropper ERO2.0 DUSTT EMC3-EIRENE LHD Boronization |
| title | Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device |
| title_full | Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device |
| title_fullStr | Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device |
| title_full_unstemmed | Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device |
| title_short | Full-torus impurity transport simulation in boron powder injection experiments in the Large Helical Device |
| title_sort | full torus impurity transport simulation in boron powder injection experiments in the large helical device |
| topic | Impurity powder dropper ERO2.0 DUSTT EMC3-EIRENE LHD Boronization |
| url | http://www.sciencedirect.com/science/article/pii/S2352179124002266 |
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