2013
DOI: 10.1364/oe.21.012831
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Emission properties of ns and ps laser-induced soft x-ray sources using pulsed gas jets

Abstract: The 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 obta… Show more

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Cited by 34 publications
(19 citation statements)
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“…. 200 eV [53,54]. Corresponding spectral maxima of the Planck distribution are found at the photon wavelengths 2.2 .…”
Section: Physical Properties Of a Plasmamentioning
confidence: 73%
See 1 more Smart Citation
“…. 200 eV [53,54]. Corresponding spectral maxima of the Planck distribution are found at the photon wavelengths 2.2 .…”
Section: Physical Properties Of a Plasmamentioning
confidence: 73%
“…Typically, the resulting plasma reaches electron densities which are one or two magnitudes below the critical density [54]. Thus, in order to enhance the brilliance of these sources, the possibility is explored to increase the particle density of the supersonic gas jet.…”
Section: B R I L L I a N C E I M P R O V E M E N T O F A L A S E R -Pmentioning
confidence: 99%
“…In addition, laser systems of higher repetition rate (average power) and/or shorter pulses can be employed. The use of ps laser pulses of the same energy as the currently employed ns pulses can boost the brightness of the laser plasma by a factor of 10 in the "water window" range [29] due to the higher degree of excitation of the gas molecules. In contrast to Deinococcus radiodurans, the soft x-ray radiation can penetrate the cell housings of the algal genus Trachelomonas (T. oblonga and T. hispida, see Fig.…”
Section: Resultsmentioning
confidence: 99%
“…Furthermore, radiation below the Ti L-edge (λ = 2.7 nm) is also blocked, ensuring monochromatic irradiation of the sample at λ = 2.88 nm wavelength. Figure 2 shows the emission spectra of nitrogen in the wavelength range from 1.5 nm to 3.5 nm measured with Al and Ti filters, respectively [26].…”
Section: Methodsmentioning
confidence: 99%