title: Soft X-Ray Emission of Laser-Produced Plasmas: Comparison for 30-ps and 20-ns Laser Pulses.
abstract: Soft x-ray emission spectra (250-875 eV) are presented for plasmas, produced by picosecond and nanosecond frequency-doubled Nd:YAG-glass laser pulses incident on 14 different target materials. The emitted spectra have been corrected for various apparatus functions which enables a direct comparison between plasmas produced by pico- and nanosecond laser pulses. The relative integrated emission intensity as a function of Z number, obtained from the corrected spectra, shows an oscillatory behavior, with distinct maxima for those elements exhibiting a dominant line emission in our photon energy window. We found for our two pulse lengths an approximately equal conversion efficiency from laser light into x-ray photons. General suggestions are given as to what target material should be used for different applications using the laser plasma as x-ray source in the energy range Studied.
authors.affiliation: Association Euratom-FOM, FOM Institute for Plasma Physics "Rijnhuizen," Edisonbaan 14, 3439 MN Nieuwegein, The Netherlands.
authors.forename: H
authors.initials: H
authors.lastname: van Brug
authors.forename: G E
authors.initials: GE
authors.lastname: van Dorssen
authors.forename: M J
authors.initials: MJ
authors.lastname: van der Wiel