Plasma and Fusion Research

Volume 17, 2403010 (2022)

Regular Articles

Simulation Analysis of the Carbon Deposition Profile on Directional Material Probes in the Large Helical Device Using the ERO2.0 Code
Mamoru SHOJI1), Suguru MASUZAKI1,2), Gakushi KAWAMURA1,2), Juri ROMAZANOV3), Andreas KIRSCHNER3) and Sebastijan BREZINSEK3)
1)
National Institute for Fusion Science, National Institutes of Natural Sciences, 322-6 Oroshi-cho, Toki 509-5292, Japan
2)
The Graduate University for Advanced Studies (SOKENDAI), Shonan Village, Hayama 240-0913, Japan
3)
Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung - Plasmaphysik, Partner of the Trilateral Euregio Cluster (TEC), Jülich 52425, Germany
(Received 19 December 2021 / Accepted 7 February 2022 / Published 30 March 2022)

Abstract

The carbon deposition profile on a Directional Material Probe (DMP) installed in the inboard side of the torus in the Large Helical Device (LHD) is investigated using the ERO2.0 code. The experimental result of the carbon deposition profile with short and wide shadows (lower deposition density areas) on the DMP is reasonably explained by the carbons sputtered from the carbon divertor plates installed in the inboard side. The simulation proves that the short and wide shadows are produced by carbons sputtered from the right and left divertor plate arrays, respectively. The experimental carbon deposition profile accumulated in the previous experimental campaign (FY2010) was successfully reproduced by the simulation, which provides detailed understanding of material (carbon) migration in the divertor region in the LHD.

Keywords

ERO2.0, directional material probe (DMP), plasma wall interaction, material migration, EMC3-EIRENE, LHD

DOI: 10.1585/pfr.17.2403010

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