抄録
Experiments are conducted to study the effects of X-ray radiation and suprathermal electrons produced by laser-produced plasma on the energy transport. Plasmas were produced by irradiating aluminum coated silicon targets (layered targets) with 1.06 μm Nd: glass Baser of 1014 W/cm2 power density. The nano-second time resolved X-ray spectra (1.5∼2.2 keV) were measured with the scintillator-photomultiplier array. The layer from which He-like ions are originated is limited to have a depth of 0.1 μm into the target, and the Si Kα line emitting region has a depth of about 1 μm. The duration of Kα line signal is longer than that of Al XII line (1s2p 1P–1s2 1S) signal. The Kα emission can be explained by X-ray absorption in the target material.
