Dust particles charge experimental evaluation in laser induced high pressure colloid plasma flows

Generation of the laser-induced dusty gas-plasma flows is possible when matrix substance spectral ionization threshold is lower than dust component evaporation threshold. Such conditions are possible under action of shortwave radiation ($\lambda \sim $213 nm) on easily ablating polymeric media ((C$_{2}$F$_{4})_{n})$ containing transparent dielectric particles (SiO$_{2})$. Electron concentration in plasma (n$_{e}\sim $10$^{18}$ cm$^{-3})$ and dust particle charge (z$\sim $1,510$^{8} \quad e)$ achievable in this way enable us to carry out investigations in a previously unstudied range of parameters. The comparative analysis of the known data on the dust particle charge with those obtained in this work shows that there exists a dependence of the dust particle charge (z/R$_{d}^{2})$ on the electron concentration in plasma carrier ranged n$_{e}\sim $10$^{8}$--10$^{18}$ cm$^{-3}$, which is close to that for the power (with the exponent equal to $\sim $0.25).