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Report No.
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Application of snow nanograin targets for the generation of fast ions in femtosecond laser plasma

Faenov, A. Y.; Magunov, A. I.*; Pikuz, S. A.*; Gasilov, S. V.*; Skobelev, I. Yu.*; Palchan, T.*; Zigler, A.*; Henis, Z.*

The energy of the directed motion of multiply charged ions produced when solid targets are exposed by low-contrast femtosecond laser pulses with low intensities. The measurements are based on the recording of spatially resolved X-ray spectra for H- and He-like Oxygen ions in the target plane. Analysis of the He- and H-like ions line profiles has revealed fractions of accelerated ions in plasma with energies from several to several tens of kiloelectron volts. We show that using a layer of frozen nanometer-size water droplets as the targets leads to an effective absorption of laser pulses and a twofold rise in the energy (to 0.1 MeV) of He-like oxygen ions compared to the use of solid targets.

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