APPLICATION OF SURFACE ACOUSTIC WAVES TO STUDY ATOMIC-MOLECULAR PROCESSES IN VACUUM SYSTEMS

The features of the interaction of surface acoustic waves with a rarefied gas medium are considered. It is shown that the attenuation of surface waves depends on the frequency, pressure, and molecular weight of the gas. The interference method was used to register small changes in the attenuation and velocity of surface waves caused by the gas load. The relationship between acoustoelectronic and atomic-molecular phenomena accompanying the processes of adsorption and desorption of atoms and molecules on the surface of a solid is analyzed. Two types of sorption processes are discussed: adsorption and desorption of gas on a solid surface; adsorption and desorption of vapor. In the first process, the temperature of the adsorbent is higher than the boiling point of the corresponding liquid. In the second, the temperature of the adsorbent corresponds to the region of coexistence of vapor and liquid. Original measuring cells were developed for the experimental study of each atomic-molecular process. The features of the use of vacuum technology for all investigated atomic-molecular processes are noted.

Authors: I. G. Simakov, Ch. Zh. Gulgenov, S. B. Bazarova

Direction: Physics

Keywords: Adsorption, desorption, surface acoustic waves, polar liquids, atomic-molecular processes, gaseous medium, vac-uum

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