U. Vogt et al., Influence of laser intensity and pulse duration on the extreme ultravioletyield from a water jet target laser plasma, APPL PHYS L, 79(15), 2001, pp. 2336-2338
Extreme ultraviolet (EUV) emission in the 11-15 nm wavelength range from a
thin liquid water jet target under illumination with a high repetition rate
, high average power laser (Nd-YLF) has been studied. To find the optimum c
onversion efficiency of laser light into EUV radiation, different laser par
ameters were applied. The laser intensity was varied between 10(11) and 10(
15) W/cm(2), and pulse duration in the range from 30 ps to 3 ns. A maximum
conversion efficiency of 0.12% in 2.2% bandwidth and 4 pi steradian at 13 n
m was achieved at a repetion rate of 250 kHz, and a strong dependence of th
e conversion efficiency on both laser intensity and pulse duration was foun
d. (C) 2001 American Institute of Physics.