Drozdenko O. Proton beam parameters optimization for realization of high-resolution backscattering method

The thesis is devoted to investigation of physical factors influencing the resolution of Rutherford backscattering spectroscopy (RBS). Main systems of the analytical accelerator facility have been optimized; a new analytical channel has been developed and constructed. This channel is designed for materials near-surface layers structure and composition research with high resolution. A new charging system compact electrostatic accelerator has been produced, allowing the energy instability of the proton beam to be reduced to the level of 0.8 keV in energy range of 0,6 - 1,8 MeV. A method for determination of the energy instability of the beam using resonant nuclear reaction of Al has been developed. Beam transport system to RBS scattering chamber has been optimized; it allowed energy instability of the beam to be lower. For RBS resolution improvement the magnetic spectrometer with double focusing is used instead of standard surface-barrier semiconductor detector. Magnetic spectrometer has better energy resolution (from 12 keV to 3 keV). Magnetic spectrometer scale calibration technique, software and data acquisition system have been developed, the spectrometry data processing has been automated.