Abstract
The soft X-ray generation by intense laser irradiations (≳1013W/cm2)1) is one of the key issues in laser fusion and also important in the industrial applications of laser plasma. At long laser wavelengths, the X-ray conversion efficiency is lower than that at short wavelengths (0.53μm and 0.35μm), especially for plane targets because of the lateral expansion of the hot electrons. The conversion efficiency by long wavelength lasers can be improved by localizing the hot electron energy deposition to cold material using novel structure in which the inhibitions of thermal conduction and expansion loss.
© 1986 Optical Society of America
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