Anisotropic diffusion as a proxy model for the estimation of heat-loads on plasma-facing components. (1st August 2022)

• Record Type: Journal Article
• Authors: Knieps, A; Liang, Y; Drews, P; Endler, M; Gao, Y; Geiger, J; Jakubowski, M; Koenig, R; Niemann, H; Wang, F Q; Xu, S; Zhou, S
• Is Part Of: Plasma physics and controlled fusion. Volume 64:Number 8(2022)
• Publication Date: 2022-08-01
• Subjects: heat load modeling -- Wendelstein 7-X -- proxy model -- field line diffusion -- anisotropic diffusion -- Monte Carlo -- kernel density estimation; Plasma (Ionized gases) -- Periodicals; Controlled fusion -- Periodicals; 530.44
• DOI: 10.1088/1361-6587/ac757d
• Languages: English
• ISSNs: 0741-3335

Abstract

Abstract: To facilitate the estimation of heat loads on plasma-facing components in fusion devices in various different magnetic geometries, a heat load proxy model was developed based on anisotropic diffusion. In this work, this model is compared to the so-called field-line diffusion approach. To facilitate the evaluation of these models, a novel synthetic camera-based approach for obtaining heat load distributions from Monte Carlo samples was also developed and implemented. With the assistance of this synthetic camera, heat load predictions for the Wendelstein 7-X divertor were obtained and compared with infrared camera observations. It was found that the anisotropic diffusion-based model achieved a closer match to infrared camera observations, while still being suitable in computational effort for large magnetic configuration database scans.