Skip to main content Accessibility help
×
Home

Ion focusing effect of electron cloud produced by laser-plasma interaction

  • SHUJI MIYAZAKI (a1), NOBUYASU OKAZAKI (a2), RYO SONOBE (a2), QING KONG (a3), SHIGEO KAWATA (a2), A.A. ANDREEV (a4) and JIRI LIMPOUCH (a5)...

Abstract

We propose a focusing mechanism of high-energy ions by an electron cloud produced by a laser interaction with slab plasma. In our 2.5-dimensional (2.5D) particle-in-cell simulations, the laser intensity is 2 × 1020 W/cm2, the laser wavelength λ is 1.053 μm, and the laser spot size is 2.5λ. When the high intensity laser irradiates slab plasma, electrons are accelerated, oscillate around the plasma and produce the electron cloud locally at the sides of the plasma. Because the electrons are localized transversely, a static electric potential is formed to focus ions and at the same time the ions are accelerated longitudinally. Though the longitudinal ion acceleration has been studied well, the ion focusing effect is reported for the first time in this paper. In our calculations, the maximum energy and intensity of the protons are 8.61 MeV and 1.89 × 1017 W/cm2, and the diameter of the proton bunch accelerated are focused to 71.2% of its initial size.

Copyright

Corresponding author

Address correspondence and reprint requests to: Shuji Miyazaki, Utsunomiya University, Department of Material Science and Engineering, Yohtoh 7-1-2, Utsunomiya 321-8585, Japan. E-mail: dt030106@cc.utsunomiya-u.ac.jp

References

Hide All

REFERENCES

Allen, M., Sentoku, Y., Audebert, P., Blazevic, A., Cowan, T., Fuchs, J., Gauthier, J.C., Geissel, M., Hegelich, M., Karsch, S., Morese, E., Patel, P.K. & Roth, M. (2003). Proton spectra from ultraintense laser-plasma interaction with thin foils: Experiments, theory, and simulation. Phys. Plasmas 10, 32833289.
Chen, H. & Wilks, S.C. (2005). Evidence of enhanced effective hot electron temperatures in ultraintense laser-solid interactions due to reflexing. Laser Part. Beams 23, 411416
Hafizi, B., Esarey, E. & Sprangle, P. (1997). Laser-driven acceleration with Bessel beams. Phys. Rev. E 55, 35393545.
Kawata, S., Maruyama, T., Watanabe, H. & Takahashi, I. (1991). Inverse-bremsstrahlung electron acceleration. Phys. Rev. Lett. 66, 20722075.
Kawata, S., Kong, Q., Miyazaki, S., Miyauchi, K., Sonobe, R., Sakai, K., Nakajima, K., Masuda, S., Ho, Y.K., Miyanaga, N., Limpouch, J. & Andreev, A.A. (2005). Electron bunch acceleration and trapping by ponderomotive force of an intense short-pulse laser. Laser Part. Beams 23, 6167.
Kong, Q., Miyazaki, S., Kawata, S., Miyauchi, K., Nakajima, K., Masuda, S., Miyanaga, N. & Ho, Y.K. (2003). Electron bunch acceleration and trapping by the ponderomotive force of an intense short-pulse laser. Phys. Plasmas 10, 46054678.
Lebo, I.G., Demchenko, N.N., Iskakov, A.B., Limpouch, J., Rozanov, V.B. & Tishkin, V.F. (2004). Simulation of high-intensity laser-plasma interactions by use of the 2D Lagrangian code “ATLANT-HE”. Laser Part. Beams 22, 267273.
Limpouch, J., Klimo, O., Bina, V. & Kawata, S. (2004). Numerical studies on the ultrashort pulse K-α emission sources based on femtosecond laser-target interactions. Laser Part. Beams 22, 147156.
Malka, G. & Miquel, J.L. (1997). experimental observation of electrons accelerated in vacuum to relativistic energies by a high-intensity laser. Phys. Rev. Lett. 78, 33143317.
Mourou, G., Barty, C.P.J. & Perry, M.D. (1998). Ultrahigh-intensity lasers: Physics of the extreme on a tabletop. Phys. Today 51, 2228.
Nakamura, T. & Kawata, S. (2003). Origin of protons accelerated by an intense laser and the dependence of their energy on the plasma density. Phys. Rev. E 67, 026403.
Passoni, M. & Lontano, M. (2004). One-dimensional model of the electrostatic ion acceleration in the ultraintense laser-solid interaction. Laser Part. Beams 22, 163169.
Pommiers, L. & Lefebvre, E. (2003). Simulation of energetic proton emission in laser-plasma interaction. Laser Part. Beams 21, 573581.
Ramirez, J., Ramis, R. & Sanz. J. (2004). One-dimensional model for a laser-ablated slab under acceleration. Laser Part. Beams 22, 183188.
Shorokhov, O. & Pukhov, A. (2004). Ion acceleration in overdense plasma by short laser pulse. Laser Part. Beams 22, 175181.
Strickland, D. & Mourou, G. (1985). Compression of amplified chirped optical pulses. Opt. Commun. 56, 219221.
Wilks, S.C., Langdon, T.E., Roth, M., Singh, M., Hatchett, S., Key, M.H., Pennington, D., Mackinnon, A. & Snavely. R.A. (2001). Energetic proton generation in ultra-intense laser-solid interactions. Phys. Plasmas 8, 542549.

Keywords

Metrics

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