High-energy-density electron beam from interaction of two successive laser pulses with subcritical-density plasma

High-energy-density electron beam from interaction of two successive laser pulses with subcritical-density plasma

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It is shown by particle-in-cell simulations that a narrow electron beam with high here energy and charge density can be generated in a subcritical-density plasma by two consecutive laser pulses.Although the first laser pulse dissipates rapidly, the second pulse can propagate for a long distance in the thin wake channel created by the first pulse and can further accelerate the preaccelerated electrons therein.Given that the second pulse also self-focuses, the resulting electron beam has a narrow waist and high charge and energy densities.

Such beams are useful for enhancing the target-back space-charge field in target normal sheath acceleration of ions and bremsstrahlung vibrating table for chocolate sources, among others.