Possibilities of X-ray spectral diagnostics of the collision region of laser-plasma flows with astrophysical similarity

It is shown that spatially resolved registration of spectral lines of the resonance series of He-like ions can be used both for diagnostics of plasma parameters in the collision region of plasma flows generated by heating solid targets with laser radiation and for the determination of the spatial position of this region. The presented calculation results obtained in the quasi-stationary approximation for aluminum plasma can be used to determine the electron density and temperature in the range of 10$^{18}$ – 10$^{21}$ cm$^{-3}$. Using a hydrodynamic code, simple estimates of the increase in plasma density in the region of collision of laser-plasma jets are made.