Multiphysics Modeling of Impurity Transport for FNSF Startup Scenario with ERO2.0. (3rd April 2023)

• Record Type: Journal Article
• Authors: Navarro, Marcos X.; Rognlien, Tom; Rensink, Marvin; Romazanov, Juri; Kirschner, Andreas; Schmitz, Oliver
• Is Part Of: Fusion science and technology. Volume 79:Number 3(2023)
• Page Start: 213
• Page End: 221
• Publication Date: 2023-04-03
• Subjects: Fusion Nuclear Science Facility, ERO2.0 -- plasma-wall interaction -- erosion; Fusion reactors -- Periodicals; Nuclear fusion -- Periodicals; Fusion reactors; Nuclear fusion; Periodicals; 621.48405
• DOI: 10.1080/15361055.2022.2148840
• Languages: English
• ISSNs: 1536-1055

Abstract

Abstract: This study focuses on performing a multiphysics study using the ERO2.0 and UEDGE codes for two standard double null configurations for the Fusion Nuclear Science Facility: (a) 100% recycling and (b) 99% recycling. Results show that the main contributor to tungsten erosion along the divertor plates is impurities from the midplane waveguides. In addition, the standard high-recycling case (100% recycling) shows a significantly higher buildup of impurities along the divertor tiles during the startup phase, which can lead to a higher increase of energy loss in the plasma during steady-state operation. Last, for high recycling, anomalous diffusion can dominate over parallel field diffusion. The work performed in this study can be iteratively applied to a full operation scenario with additional physics such as those from neutrals, wall shaping, and additional external fields.