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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Vol. 21, Iss. 7 — Jul. 1, 2004
  • pp: 1391–1396

Generation of high-energy electrons by a femtosecond terawatt laser propagating through a sharp downward density transition

Hyyong Suk, Hae June Lee, and In Soo Ko  »View Author Affiliations


JOSA B, Vol. 21, Issue 7, pp. 1391-1396 (2004)
http://dx.doi.org/10.1364/JOSAB.21.001391


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Abstract

We demonstrate by computer simulations the generation of high-energy electrons by using a femtosecond terawatt laser pulse propagating in a plasma with a sharp downward density transition. In the two-dimensional simulation, a 20-TW laser pulse with a pulse duration of 60 fs and a wavelength of 800 nm propagates through a plasma with a sharp density transition consisting of n0I=5×1018 cm-3 and n0II=0.75n0I. The simulation result demonstrates that a significant amount of electrons can be self-trapped and accelerated to an energy of 117 MeV over a distance of 0.62 mm by the ultrastrong nonlinear laser wake field. In addition, it has been found that the trapping dynamics is much different from the electron-beam-driven dynamics and that the energy spread of the trapped electrons can be reduced significantly by use of the density tapering method.

© 2004 Optical Society of America

OCIS Codes
(190.7110) Nonlinear optics : Ultrafast nonlinear optics
(350.4990) Other areas of optics : Particles
(350.5400) Other areas of optics : Plasmas

Citation
Hyyong Suk, Hae June Lee, and In Soo Ko, "Generation of high-energy electrons by a femtosecond terawatt laser propagating through a sharp downward density transition," J. Opt. Soc. Am. B 21, 1391-1396 (2004)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-21-7-1391

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