Search academic texts

Information × Registration Number 0224U000851, 0122U001662 , R & D reports Title Complex studies of formation processes and properties of nano- and microparticles in plasma of gas discharges of different types popup.stage_title Head Azarienkov Mykola O., Доктор фізико-математичних наук Registration Date 14-01-2024 Organization V.N. Karazin Kharkiv National University popup.description2  The process of synthesis of nanoparticles in the plasma of RF discharges of capacitive and inductive types, as well as in pulsed discharge, was studied. In particular, systematic experiments were conducted using a pulsed discharge for the formation and retention of nanoparticles. A wide spectrum of nanoparticle sizes and shapes of regions of their containment in a pulsed discharge has been demonstrated. It is shown that by changing the parameters of the discharge (frequency, duty cycle, voltage, gas pressure) it is possible to control the parameters and behavior of nanoparticles in a wide range. A physical and numerical model of dusty afterglow plasma containing negative ions was developed, taking into account the distribution of dust by charge. The properties of the dusty Ar/C2H2 afterglow plasma were studied using this model. Spatially averaged electron and ion densities, electron temperature, and argon atom densities in various excited states in the afterglow plasma were calculated. Calculations were carried out under experimental conditions by scientists of the Ruhr University in Bochum (Germany). The emergence of plasma crystals in non-equilibrium dusty plasma is described: in the electric field, along the laser pulse propagation channel, in the plasma flow, during the pumping of gas from technological devices to maintain a vacuum. The mechanism of formation of plasma crystals in these cases is proposed. Product Description popup.authors Denysenko Igor Borysovych Dudin Stanislav V. Lisovskiy Valeriy Oleksandrovich Maslov Vasyl I popup.nrat_date 2024-01-14 Close