Fig. 1. Radiation spectrum of KAlSi₃O₈ plasma in x-ray wavelength range calculated using steady-state approximation for electron temperature T_e = 1000 eV and electron density N_e = 10²¹ cm⁻³. Intensity vs nλ is shown for reflection order n = 1–5 of diffraction crystals (each order is associated with its own color).

Fig. 2. Spectrum of radiation emitted by KAlSi₃O₈ plasma in wavelength range of (a) 5.8–7.2 Å and (b) 11.6–15.1 Å calculated for conditions from Fig. 1. Intensity vs nλ is shown for reflection order n = (a) 1 and 2 and (b) 2 and 4. Each order is associated with its own color.

Fig. 3. Temporal dependencies of intensities of spectral lines emitted by Al, Si, and K ions. The curves were obtained using a time-dependent kinetic model for a plasma with electron temperature T_e = 1000 eV and N_e = 10²¹ cm⁻³. In the initial state, all ions are singly ionized.

Fig. 4. (a) Spectrum of x-ray radiation emitted during irradiation of orthoclase crystal by (600-J, 480-ps) laser pulse. Indicated are the most intense spectral lines corresponding to the radiative transitions in multicharged ions of Si, Al, and K (K spectral lines are observed in the second order of reflection). (b) Enlarged region with three groups of KHeα line satellites corresponding to transitions in Li-like ion K XVII. The upper and lower configurations for each group of satellites are listed in Table I.

Table 1. Measured wavelengths of transitions in He- and Li-like K ions. Li-like satellites are labeled in accordance with notation introduced in Ref. 31.