Experiments on plasma heating by CO2 laser radiation in the TIR-1 facility

The results are given of experiments performed on the TIR-1 high-power laser facility, utilizing x-ray plasma diagnostic methods. The experiments were carried out at an energy of ~50 J for a focal spot of ~300 μ and a pulse duration of ~2 nsec. The effective electron temperature in the energy cutoff range E_co~3.5–5 keV was 7 keV. Photons with energies of 10–100 keV were detected. Spectra of the H-, He-, and Li-like fluorine ions were recorded and used to determine the plasma parameters: T_e=220 eV, N_H/N_N=13, N_He/N_H=2.1, N_Li/N_He=0.06.