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Proceedings Paper

Proton acceleration to above 5.5 MeV by interaction of 10[sup]17[/sup] W/cm[sup]2[/sup] laser pulse with H[sub]2[/sub]O nano-wire targets
Author(s): E. Schleifer; N. Bruner; S. Eisenmann; M. Botton; S. A. Pikuz; A. Y. Faenov; D. Gordon; A. Zigler
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Paper Abstract

Compact sources of high energy protons (50-500MeV) are expected to be key technology in a wide range of scientific applications 1-8. Particularly promising is the target normal sheah acceleration (TNSA) scheme 9,10, holding record level of 67MeV protons generated by a peta-Watt laser 11. In general, laser intensity exceeding 1018 W/cm2 is required to produce MeV level protons. Enhancing the energy of generated protons using compact laser sources is very attractive task nowadays. Recently, nano-scale targets were used to accelerate ions 12,13. Here we report on the first generation of 5.5-7.5MeV protons by modest laser intensities (4.5 × 1017 W/cm2) interacting with H2O nano-wires (snow) deposited on a Sapphire substrate. In this setup, the plasma near the tip of the nano-wire is subject to locally enhanced laser intensity with high spatial gradients, and confined charge separation is obtained. Electrostatic fields of extremely high intensities are produced, and protons are accelerated to MeV-level energies. Nano-wire engineered targets will relax the demand of peak energy from laser based sources.

Paper Details

Date Published: 26 May 2011
PDF: 10 pages
Proc. SPIE 8079, Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles, 80791M (26 May 2011); doi: 10.1117/12.888993
Show Author Affiliations
E. Schleifer, Hebrew Univ. (Israel)
N. Bruner, Hebrew Univ. (Israel)
S. Eisenmann, Hebrew Univ. (Israel)
M. Botton, Hebrew Univ. (Israel)
S. A. Pikuz, Joint Institute for High Temperatures (Russian Federation)
A. Y. Faenov, Joint Institute for High Temperatures (Russian Federation)
D. Gordon, U.S. Naval Research Lab. (United States)
A. Zigler, Hebrew Univ. (Israel)


Published in SPIE Proceedings Vol. 8079:
Laser Acceleration of Electrons, Protons, and Ions; and Medical Applications of Laser-Generated Secondary Sources of Radiation and Particles
Wim P. Leemans; Eric Esarey; Simon M. Hooker; Kenneth W. D. Ledingham, Editor(s)

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