Emission properties of ns and ps laser-induced soft x-ray sources using pulsed gas jets
2013; Optica Publishing Group; Volume: 21; Issue: 10 Linguagem: Inglês
10.1364/oe.21.012831
ISSN1094-4087
AutoresMatthias Müller, Frank-Christian Kühl, Peter Großmann, Pavel Vrba, Klaus Mann,
Tópico(s)Atomic and Molecular Physics
ResumoThe influcence of the pulse duration on the emission characteristics of nearly debris-free laser-induced plasmas in the soft x-ray region (λ ≈ 1-5 nm) was investigated, using six different target gases from a pulsed jet. Compared to ns pulses of the same energy, a ps laser generates a smaller, more strongly ionized plasma, being about 10 times brighter than the ns laser plasma. Moreover, the spectra are considerably shifted towards shorter wavelengths. Electron temperatures and densities of the plasma are obtained by comparing the spectra with model calculations using a magneto-hydrodynamic code.
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