Physics and engineering studies of heat fluxes to ITER plasma-facing componentsBrank, Matic (Avtor) Kos, Leon (Mentor) Pitts, Richard A. (Komentor) tokamakplasmafield-line tracingfirst wall of fusion reactortomographybolometerThis thesis deals with plasma power deposition to the ITER first wall and bolometer diagnostic systems. In the first part, the assessment of the heat fluxes is presented, taking into an account plasma scenarios predicted during ITER’s operational phase. The focus is on the experimentally verified power decay of the particles conducted along the magnetic field lines, considering exponential profile, the double exponential profile and the edge-localized modes. The photonic power loads to the first wall are also assessed, taking into account the spatially distributed plasma power sources. In the second part, tomography methods were used to reconstruct these plasma power sources. First, an assessment of the synthetic signals was made using bolometers, taking into account experimentally verified measurement errors. Then we arrived at the solution to the reconstruction, i.e., the inverse problem, with the help of the regularisation method of anisotropic smoothness along magnetic surfaces. The results of the numerical analyses confirmed that the heat fluxes to the first wall are within the prescribed engineering limits. The use of the tomography method shows that the currently defined configuration of the bolometers is suitable for the proper reconstruction of plasma power sources. The bolometers will also be able to detect individual power peaks in the plasma. Additional analyses were made of the quality of the reconstruction if specific bolometers were removed from the defined configuration. The reduction in the number of bolometers does not greatly affect the reconstruction; however, there are different possible bolometer-removal scenarios that affect such analyses and only a few were considered. The experimental verification of the tomography method was not possible during this PhD. It is expected that these algorithms will be tested once ITER is in its operational phase.[M. Brank] 20242024-10-01 08:30:24Doktorsko delo/naloga163016UDK: 533.95:621.039.61:537.612(043.3)VisID: 266835COBISS_ID: 210534147sl