Global simulation analysis of impurity transport in LHD peripheral regions

2014 Fiscal Year Final Research Report

• Project/Area Number: 24760702
• Research Category: Grant-in-Aid for Young Scientists (B)
• Allocation Type: Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: National Institute for Fusion Science
• Principal Investigator: KAWAMURA Gakushi 核融合科学研究所, ヘリカル研究部, 助教 (70509520)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 核融合プラズマ / 周辺プラズマ / 輸送 / リサイクリング / 不純物 / LHD

Outline of Final Research Achievements

A transport model with EMC3-EIRENE code was developed to realize impurity transport analysis on the peripheral regions of Large Helical Device of NIFS. Simulation analysis was carried out and showed the following results. Modification of the divertor configurations, from the open to the closed ones, increases hydrogen recycling between neutral molecules and ions and hence, increases plasma density and impurity density in the divertor regions. Impurity screening due to plasma flow, however, is dominant in the case of high density plasma, and the difference of the amount of impurity ions in the plasma between the open and the closed divertor configurations is relatively small.

Free Research Field

核融合プラズマシミュレーション