SPECTRALLY RESOLVED IMAGE OF 120 FS LASER-PRODUCED PLASMA

A linear zone plate surface structure was created on the surface of mi ca crystal and used for obtaining spectrally resolved images of 120 fs laser-produced plasma. A linear Fresnel zone structure was optimized on a wavelength lambda = 9.16 Angstrom and has a focal length of f = 5 cm, minimum zone width Delta z(n) = 300 nm, total length l = 10 cm, t otal width of zone plate 2r(n) = 122.6 mu m. Images of laser-produced plasma in the spectral range 9.12-9.31 Angstrom were obtained For high Z (Lanthanum) element target the size of the X-ray radiation spot was not more than 20 mu m.