Assessing global beryllium erosion via tomographic reconstruction of 3D beryllium emission profiles in ITER

• DOI: 10.1088/1361-6587/ad1a3d
• Publication Date: 2024-01-03T22:33:47Z
• Authors: Vladislav S Neverov; Richard A Pitts; Radmir I Khusnutd...; Andrey G Alekseev; Evgeny N Andreenko; Matthew Carr; Martin Kocan; Maarten De Bock; Alexey V Gorshkov; Andrey M Kozlov; A B Kukushkin; Jack Lovell; Alex Meakins; Anton A Morozov; Evgeny Veshchev
• Keywords: Reflection; Fusion power

Abstract A new method for estimating the global erosion of beryllium (Be) in ITER is proposed. The uses raytracing-aided tomography to reconstruct three-dimensional (3D) profile visible-light emissivity boundary plasma from images captured with filtered cameras VIS/IR wide angle viewing system, H-alpha (and Visible) Spectroscopy diagnostics and signals collected Divertor Impurity Monitor. light reflected into detectors metallic plasma-facing components (PFCs) out process. reconstructed Be then used assess influx density distribution along all PFCs by integrating product S/XB coefficient normal PFC surface. accuracy this evaluated a comparison synthetic data produced recent simulation migration using ERO2.0 code. impact uncertainty reflection properties on error reconstructing 3D analysed. allows recover good plasma-wetted areas under conditions H-mode fusion power operation high far-SOL density. Under lower L-mode operation, only total integrated over area first wall panels relatively can be accuracy. It shown that neglecting effects may lead twofold overestimation influx.