Abstract
The spectrum‐resolved radiant energy in 0.1∼1.6 keV range from various plane targets irradiated by a 0.53μm laser at 0.1∼1.0 nsec pulse through a f/1.6 lens with a nominal incidence angle of 54° were obtained. Atomic number dependences of the spectrum and x‐ray conversion efficiency are described. The conversion efficiency increased as laser pulse duration.These x‐ray emission spectra are investigated by the 1‐D hydrodynamic Lagrangian code HIMICO and 2‐D particle in‐cell code IZANAMI, both of which are omission thermodynamic equilibrium (non‐LTE) average ion model and multi‐group radiation transport. The physical meaning of the experimentally obtained spectrum is clarified and the total emitted density proves to have maximum at certain combination of density and temperature.
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