QI Li-hong, LI Zhong-fang, NI Qi-liang, et al. Experimental study of the spectrum at 11~20 nm of a laser-produced plasma source using water target[J]. Optics and precision engineering, 2005, 13(3): 272-275.
QI Li-hong, LI Zhong-fang, NI Qi-liang, et al. Experimental study of the spectrum at 11~20 nm of a laser-produced plasma source using water target[J]. Optics and precision engineering, 2005, 13(3): 272-275.DOI:
A laser- produced plasma(LPP) source is built with water as target and a Nd:YAG laser as irradiate laser
the radiation of the LPP source at 11~20 nm is measured with an AXUV100 silicon photodiode combined with a McPHERSON model 247 grazing incidence monochromator
of which the monochromator resolution is
Δ
λ≤0.075 nm
and the wavelength scanning interval is 0.5 nm. The experimental result demonstrates that the water target LPP source has EUV emission at 11~20 nm wavelength
which are all generated from electronic transitions in oxygen ions. In addition
to solve the erosion problem caused by the short distance between the laser-water action point and the nozzle
the distance is lengthened by heating the nozzle to reduce the effect caused by the evaporation and the adiabatic expansion.
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references
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