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X-ray emission from high-intensity interaction of picosecond and subnanosecond laser pulses with solid targets

Badziak J., Jabłoński S., Makowski J., Parys P., Ryć L., Vankov A.B., Wołowski J., Woryna E.

Optica Applicata

2002

Vol. 32, nr 1-2

41-46

The results of comparison of X-ray emission from plasmas produced by 1-ps and 0.5-ns laser pulses from massive and foil targets are reported. The measurements were performed for the soft (0.8-1.6 keV) and hard (4-30 keV) X-rays with the use of filtered p-i-n Si photodiodes at laser intensities of up to 10/sup 17/ W/cm/sup 2/ for ps pulses and up to 3 * 10/sup 14/ W/cm/sup 2/ for sub-ns ones. The effect of the laser pulse duration on the X-ray yields for various laser beam focal spots, laser pulse energies and atomic numbers of the targets were investigated.

Effect of a laser beam focus position on ion emission from plasmas produced by picosecond and sub-nanosecond laser pulses from solid targets.

Woryna E., Badziak J., Makowski J., Parys P., Wołowski J., Krasa J., Laska L., Rohlena K., Vankov A.B.

Optica Applicata

2001

Vol. 31, nr 4

791-798

The dependences of parameters of laser-produced ion fluxes on the laser focus position with respect to the target surface for picosecond laser pulses are presented and compared with the ones for sub-nanosecond pulses at nearly the same densities of laser energy. The experiments were performed with the use of chirped-pulse-amplification Nd:glass laser system. Thick Au targets were irradiated by normally incident laser pulses. The maximum intensities of the focused laser beams were 8 * 10/sup 16/ and 2 * 10/sup 14/ W/cm/sup 2/ for ps and sub-ns laser pulses, respectively. The particle fluxes were analysed with the use of ion collectors and an electrostatic ion-energy analyser. The ion current densities and the charges carried by ions as well as the maximum and peak velocities of fast and thermal ion groups as a function of the focus position for ps and sub-ns pulses were determined.