Experimental Setup for Plasma-Stimulated Modification of Biopolymer Materials

The description of an experimental setup is presented, which allows the generation of high-frequency and microwave discharges for creating plasma streams in a wide range of operating parameters. Experiments on the generation of these discharges are described. Numerical modeling of the spatial distribution of electromagnetic fields that ensure the discharge sustainment under conditions corresponding to the actual parameters of the existing design and setup has been performed. Calculations of the absorption coefficients for waves at working frequency made it possible to determine the localization of absorption regions of the discharge and estimate the efficiency of the power introduced into the discharge for given discharge initiation techniques. The plasma parameters (the electron temperature and concentration) were obtained experimentally, and their dependences on the initial values of the pressure and power of electromagnetic field deposited into the discharge are presented. In the region of the placement of biopolymer samples, the parameters of the ion component of the plasma flow were determined. The results of the pilot studies on the influence of plasma on the physical and chemical properties of biopolymer samples are presented.