Radiofrequency Bremsstrahlung of Electrons and Nanoparticles of Heterogeneous Plasma with a Condensed Dispersed Phase

The mechanism of braking radiation generation in the bulk of heterogeneous plasma formations has been studied in the framework of the statistical “cell” approach to the description of the ionization in heterogeneous plasma (HP). In our description of the effective interaction between microfields and charges in plasma, the stochastic motion of charged particles in HP is considered as an evolution of anharmonic oscillations executed by separate charges in an instant field of electric forces in the electroneutral cell. Effective values of frequency and the specific integral power of the braking radiation from HP in the radiofrequency spectral range are calculated by averaging over the ensemble of cells. The amplitude-frequency function and relative contributions of separate oscillation modes of plasma charges to the emitted radiation intensity are determined in the random phase approximation. A comparative analysis of the modeling data and the experimental data obtained for plasma with aluminum oxide nanoparticles was carried out in the space of key HP parameters. A good agreement between numerical results and experimental data was obtained at both qualitative and quantitative levels. Possible applications for telediagnostics of heterogeneous plasma formations were discussed.