Персона: Хуснутдинов, Радмир Ильдарович
Email Address
Birth Date
Результаты поиска
Development of a tomographic reconstruction method for axisymmetric D(alpha)emission profiles in the ITER plasma boundary
A tomographic method for reconstructing the axially symmetric D(alpha)emission profile in the ITER scrape-off layer and divertor from D(alpha)intensity measurements in the fields of view (FoV) of Vis/IR TV and Divertor Impurity Monitor diagnostics is under development. The method takes into account the strong background signal due to stray light from divertor produced by reflections from the metal wall of the vacuum chamber. The method allows to filter out the reflections in D(alpha)signals measured in the main chamber. The accuracy of this method is tested within the framework of a synthetic diagnostic, which uses the Raysect and Cherab numerical codes for ray-tracing simulations. The D(alpha)emission profiles, simulated with the SOLPS and OEDGE codes, are used as synthetic experimental data. Uncertainty in light reflection properties of the first wall (FW) is the major factor affecting the accuracy of the D(alpha)emission reconstruction. The dependence on the uncertainty in the FW surface roughness and on the ratio of diffusive to specular reflection of the error in recovering useful D(alpha)signals (the direct light without reflections) in the FoV of the ITER main chamber H-alpha and Visible Spectroscopy Diagnostic is obtained.
Generalization of Modified SXB Method for Hydrogen to the Case of Isotope Mixture
Modeling of the Sputtering Rate of the Tokamak First Wall by Atoms of Hydrogen Isotopes in the Near-Wall Plasma
Effect of Thermodynamic Nonequilibrium of Hydrogen Recycling on the Charge-Exchange Spectroscopy of Tokamak Edge Plasma
Modification of SXB Method for Hydrogen in ITER Main Chamber
© 2019, Pleiades Publishing, Ltd.A modification of the SXB method, used for evaluating the atom/ion flux from the tokamak first wall into plasma using the observed wavelength-integrated spectral line intensity, is proposed. The modification allows, using the high-resolution spectroscopy data, to estimate — in real time measurements — the fluxes of atomic and molecular hydrogen from the first wall of the tokamak main chamber into plasma without measurements of molecular spectra. The modified SXB method is tested by comparing the results with the SOLPS code simulations for six modelled types of the SOL plasma profiles in ITER. The proposed modification is motivated by the fact that the hydrogen molecular spectra will not be used for ITER operation diagnostics because of difficulties of their interpretation.