Excitation of X-Ray Plasma Satellites in a Femtosecond Laser-Produced Plasma

The excitation of X‐ray plasma satellites was investigated in the plasma created by subpicosecond laser pulses with various intensities. It is shown that when laser flux density is greater then 6×1016 W/cm2 strong oscillating electrical fields with ω∼(1.5–1.6)×1015 s−1 are excited in the plasma. These oscillations lead to modifications of profiles of X‐Ray spectral lines observed.