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The weighted oscillator strength spectra of the resonant lines for ion stages whose resonance transitions.
Time-averaged XUV spectrum at a laser intensity of , which corresponds to a time-averaged electron temperature close to 12 eV viewed at 45° with respect to the incident laser pulse (a). Inset: the time-averaged spectrum of the potassium plasma emission in the narrow band spectral region obtained with a high-resolution spectrometer viewed at 90° with respect to the incident laser pulse.
(a) Temporal behavior of the emission at 39 nm at a laser intensity of . The dots represent the raw, experimentally measured data and the solid line is a smoothing of the experimental result. The dashed line is the calculated temporal waveform of the 39-nm emission. (b) Numerical calculation of the temporal change in the ionic population based on a time-dependent CRE model.
Normalized time-averaged XUV spectra at laser wavelengths of 1064 nm and 532 nm, respectively.
The numerical calculated spectrum comparison without (a) and with (b) self-absorption (opacity) effects in the potassium plasma at an electron temperature of 12 eV based on the time-dependent CRE model combined with a Cowan code simulation. The evaluated transmission coefficient at an effective plasma thickness of (c).
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