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Self-phase modulation of temporary overlapped chirped pulses.

Vankov A., Badziak J.

Optica Applicata

2000

Vol. 30, nr 2-3

431-442

A self-phase modulation at amplification of temporary overlapped chirped, pulses is investigated. The analytical and numerical calculations are used to predict the effects of prepulse intensity increasing and additional satellites arising after recompression as well as the effects of spectrum broadening and shape distortion of the pulses. The experimental results are presented that agree well with the calculations.

High-intensity interaction of picosecond laser pulses with metal target.

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

Optica Applicata

2000

Vol. 30, nr 1

83-92

The results of experimental investigation of the interaction of picosecond light pulses with a Cu target at light intensities up to 3.10/sup 16/ W/cm/sup 2/ are presented and discussed. The experiment was performed with the use of a terawatt chirped-pulse-amplification Nd:glass laser and the apparatus for corpuscular (ion collectors, electrostatic ion energy analyser) and X-ray (p-i-n Si photodiode) diagnostics of laser-produced plasma. The charge spectra of ions emitted from a picosecond plasma as well as the energy-dependent (or intensity-dependent) characteristics of ion emission and soft X-ray yield are determined. The electron temperature and the average charge state of the plasma are evaluated as a function of light intensity.