Effect of plasma transport in the stochastic magnetic field lines layer on the divertor heat and particle load profiles

2017 Fiscal Year Final Research Report

• Project/Area Number: 15H04236
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: Masuzaki Suguru 核融合科学研究所, ヘリカル研究部, 教授 (80280593)
• Co-Investigator(Kenkyū-buntansha): 小林 政弘 核融合科学研究所, ヘリカル研究部, 准教授 (30399307) ; 田中 宏彦 名古屋大学, 工学研究科, 助教 (60609981)
• Co-Investigator(Renkei-kenkyūsha): KAWAMURA Gakushi 核融合科学研究所, ヘリカル研究部, 助教 (70509520) ; TOKITANI Masayuki 核融合科学研究所, ヘリカル研究部, 助教 (30455208) ; MORISAKI Tomohiro 核融合科学研究所, ヘリカル研究部, 教授 (60280591) ; SHOJI Mamoru 核融合科学研究所, ヘリカル研究部, 准教授 (00280602)
• Research Collaborator: DAI Shyuyu Dalian University of Technology ; SUZUKI Yasuhiro 核融合科学研究所, ヘリカル研究部, 准教授 ; JAKUBOWSKI Marcin Max-Planck-Institut für Plasmaphysik ; DREWELOW Peter Max-Planck-Institut für Plasmaphysik ; FENG Yunfeng Max-Planck-Institut für Plasmaphysik
• Project Period (FY): 2015-04-01 – 2018-03-31
• Keywords: ダイバータ / 熱・粒子束分布 / 統計的磁気面 / EMC3-EIRENE / 2次元可視分光計測 / LHD / 静電プローブ / 周辺プラズマ輸送

Outline of Final Research Achievements

Divertor is a essential part in fusion devices. Understanding of heat and particle transport to divertor from high temperature and density core plasma is an important issue in the fusion research. In this study, we conducted improvements of a plasma and neutral particle transport code, EMC3-EIRENE with comparison between the experimental data and the results of simulation with the code. We measured the heat and particle fluxes profiles on a divertor tile, and constructed 2-dimensional visible spectroscopy for measuring hydrogen and impurities behavior in divertor. The profiles change during plasma discharge. The simulation can reproduce basic profile, but that cannot reproduce modified profile. Additional data analysis suggest that the modification of the profile is caused by a modification of magnetic field lines structure. By the spectroscopy, we got the data related to impurities behaviors. We will try to reproduce the behaviors with the improved code.

Free Research Field

プラズマ理工学