Skip to main content Accessibility help

Self-focusing effect in Au-target induced by high power pulsed laser at PALS

  • L. Torrisi (a1) (a2), D. Margarone (a1) (a2), L. Laska (a3), J. Krasa (a3), A. Velyhan (a3), M. Pfeifer (a3), J. Ullschmied (a3) and L. Ryc (a4)...


Self-focusing effects, induced by ASTERIX pulsed laser at PALS Laboratory of Prague, have been investigated. Laser was employed at the third harmonics (438 nm) and intensities of the order of 1016 W/cm2. Pure Au was used as thin target and irradiated with 30° incidence angle. An ion energy analyzer was employed to detect the energy-to-mass ratio of emitted ions from plasma. Measurements were performed by changing the focal point position with a high spatial resolution step-motor. Results demonstrated that non linear processes, due to self-focusing effects, occurs when the laser beam is focused at about 200 µm in front of the target surface. In such conditions, a new ion group, having high charge state and kinetic energy, is produced because of the increment in temperature of the laser-generated plasma.


Corresponding author

Address correspondence and reprint requests to: L. Torrisi, INFN-Laboratori Nazionali del Sud, Via S. Sofia 62, 95125 Catania, Italy. E-mail:


Hide All
Batani, D., Dezulian, R., Redaelli, R., Benocci, R., Stabile, H., Canova, F., Desai, T., Lucchini, G., Krousky, E., Masek, K., Pfeifer, M., Skala, J., Dudzak, R., Rus, B., Ullschmied, J., Malka, V., Faure, J., Koenig, M., Limpouch, J., Nazarov, W., Pepler, D., Nagai, K., Norimatsu, T. & Nishimura, H. (2007). Recent experiments on the hydrodynamics of laser-produced plasmas conducted at the PALS laboratory. Laser Part. Beams 25, 127141.
Bell, A.R. (1996). Laser-produced plasma. In Plasma Physics and Introduction Course (Dendy, R., ed.). New York: Cambridge University Press.
Giulietti, D. & Gizzi, L.A. (1998). X-ray emission from-laser-produced plasmas. Rivista Nuovo Cimento 21, 193.
Giulietti, A., Galimberti, M., Gamucci, A., Giulietti, D., Gizzi, L.A., Koester, P., Labate, L., Tomassini, P., Ceccotti, T., D'Oliveira, P., Auguste, T., Monot, P. & Martin, P. (2007). Search for stable propagation of intense femtosecond laser pulses in gas. Laser Part. Beams 25, 513521.
Jungwirth, K. (2005). Recent highlights of the PALS research program. Laser Part. Beams 23, 177182.
Koyama, K., Adachi, M., Miura, E., Kato, S., Masuda, S., Watanabe, T., Ogata, A. & Tanimoto, M. (2006). Monoenergetic electron beam generation from a laser-plasma accelerator. Laser Part. Beams 24, 95100.
Laska, L., Badziak, J., Gammino, S., Jungwirth, K., Kasperczuk, A., Krasa, J., Krousky, E., Kubes, P., Parys, P., Pfeifer, M., Pisarczyk, T., Rohlena, K., Rosinski, M., Ryc, L., Skala, J., Torrisi, L., Ullschmied, J., Velyhan, A. & Wolowsk, J. (2007). The influence of an intense laser beam interaction with preformed plasma on the characteristics of emitted ion streams. Laser Part. Beams 25, 549556.
Laska, L., Jungwirth, K., Kralikova, B., Krasa, J., Krousky, E., Masek, K., Pfeifer, M., Rohlena, K., Skala, J., Ullschmied, J., Badziak, J., Parys, P., Ryc, L., Szydlowski, A., Wolowski, J., Woryna, E., Ciavola, G., Gammino, S., Torrisi, L. & Boody, F.P. (2004). Review of laser ion sources developments in Prague and production of q over 50+ ions at Prague Asterix Laser System (Invited). Rev. Sci. Instr. 75, 15461550.
Laska, L., Jungwirth, K., Krasa, J., Krousky, E., Pfeifer, M., Rohlena, K., Skala, J., Ullschmied, J., Velyhan, A., Kubes, P., Badziak, J., Parys, P., Rosinski, M., Ryc, L. & Wolowski, J. (2006 a). Experimental studies of interaction of intense long laser pulse with a laser-created Ta plasma. Czech J. Phys. 56, B506B514.
Laska, L., Jungwirth, K., Krasa, J., Krousky, E., Pfeifer, M., Rohlena, K., Ullschmied, J.Badziak, J., Parys, P., Wolowski, J., Gammino, S., Torrisi, L. & Boody, F.P. (2006 b). Self-focusing in processes of laser generation of highly-charged and high-energy heavy ions. Laser Part. Beams 24, 175179.
Laska, L., Jungwirth, K., Krasa, J., Pfeifer, M., Rohlena, K. & Ullschmied, J. (2005 a). The effect of pre-plasma and self-focusing on characteristics of laser produced ions. Czech. J. Phys. 55, 691699.
Laska, L., Ryc, L., Badziak, J., Boody, F.P., Gammino, S., Jungwirth, K., Krasa, J., Krousky, E., Mezzasalma, A., Parys, P., Pfeifer, M., Rohlena, K., Torrisi, L., Ullschmied, J. & Wolowski, J. (2005 b). Correlation of highly charged ion and X-ray emissions from the laser-produced plasma in the presence of non-linear phenomena. Rad. Effects Defects Solids 160, 557566.
Lifschitz, A.F., Faure, J., Glinec, Y., Malka, V. & Mora, P. (2006). Proposed scheme for compact GeV laser plasma accelerator. Laser Part. Beams 24, 255259.
Malka, V. & Fritzler, S. (2004). Electron and proton beams produced by ultra short laser pulses in the relativistic regime. Laser Part. Beams 22, 399405.
Malka, V., Faure, J., Glinec, Y. & Lifschitz, A.F. (2006). Laser-plasma accelerator: Status and perspectives. Phil. Trans. R. Soc. A 364, 601.
Mangles, S.P.D., Walton, B.R., Najmudin, Z., Dangor, A.E., Krushelnick, K., Malka, V., Manclossi, M., Lopes, N., Carias, C., Mendes, G. & Dorchies, F. (2006). Table-top laser-plasma acceleration as an electron radiography source. Laser PartT. Beams 24, 185190.
Margarone, D., Laska, L., Torrisi, L., Gammino, S., Krasa, J., Krousky, E., Parys, P., Pfeifer, M., Rohlena, K., Rosinski, M., Ryc, L., Skala, J., Ullschmied, J., Velyhan, A. (2007). Studies of craters' dimension for long-pulse laser ablation of metal targets at various experimental conditions. Appl. Surf. Sci. 254, 27972803.
Sun, G.Z., Ott, E., Lee, Y.C. & Guzdar, P. (1987). Self-focusing of short intense pulses in plasmas. Phys. Fluids 30, 526532.
Torrisi, L., Gammino, S., Ando, L., Mezzasalma, A.M., Badziak, J., Parys, P., Wolowski, J., Woryna, E., Jungwirth, K., Kralikova, B., Krasa, J., Laska, L., Pfeifer, M., Rohlena, K., Skala, J., Ullschmied, J. & Boody, F.P. (2002). Study of the etching process and crater formation induced by intense laser pulses at PALS. Czech. J. Phys. 52, 329334.
Woryna, E., Parys, P., Wolowski, J. & Mroz, W. (1996). Corpuscular diagnostics and processing methods applied in investigations of laser-produced plasma as a source of highly ionized ions. Laser Part. Beams 14, 293321.



Full text views

Total number of HTML views: 0
Total number of PDF views: 0 *
Loading metrics...

Abstract views

Total abstract views: 0 *
Loading metrics...

* Views captured on Cambridge Core between <date>. This data will be updated every 24 hours.

Usage data cannot currently be displayed