Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE · 1997 · 23 citations · 0 references
X-ray SpectroscopyEngineeringLaser-plasma InteractionHollow AtomsLaser Plasma PhysicHigh-power LasersOptical PropertiesLaser Plasma PhysicsSubpicosecond Laser RadiationPhysicsRelativistic Laser-matter InteractionAtomic PhysicsHigh-resolution X-ray SpectroscopyX-ray Free-electron LaserBent Micra CrystalsNatural SciencesSpectroscopyX-ray DiffractionApplied PhysicsLaser-induced BreakdownPlasma Radiation
The investigations of ultrashort (0.4 - 0.6 ps) laser pulse radiation interaction with solid targets have been carried out. The Trident subpicosecond laser system was used for plasma creation. The X-ray plasma emission was investigated with the help of high-resolution spectrographs with spherically bent micra crystals. It is shown that when high contrast ultrashort laser pulses were used for plasma heating its emission spectra could not be explained in terms of commonly used theoretical models and transitions in so called `hollow atoms' must be taken into account for adequate description of plasma radiation.