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

• Autorzy: Woryna, E. , Badziak, J. , Makowski, J. , Parys, P. , Wołowski, J. , Krasa, J. , Laska , L. , Rohlena, K. , Vankov, A.B.
• Języki publikacji: EN

Abstrakty

EN

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.

• Czasopismo: Optica Applicata
• Rocznik: 2001
• Tom: Vol. 31, nr 4
• Strony: 791-798
• Opis fizyczny: bibliogr. 13 poz.

Twórcy

autor

Woryna, E.

autor

Badziak, J.

autor

Makowski, J.

autor

Parys, P.

autor

Wołowski, J.

autor

Krasa, J.

autor

Laska , L.

autor

Rohlena, K.

autor

Vankov, A.B.

• Institute of Plasma Physics and Laser Microfusion, ul. Hery 32, P.O. Box 49, 00-908 Warszawa