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Hot electron refluxing in the short intense laser pulse interactions with solid targets and its influence on K-α radiation

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Horný V., Klimo O.

issue 2

233-237

Fast electrons created as a result of the laser beam interaction with a solid target penetrate into the target material and initialize processes leading to the generation of the characteristic X-ray K-α radiation. Due to the strong electric field induced at the rear side of a thin target the transmitted electrons are redirected back into the target. These refluxing electrons increase the K-α radiation yield, as well as the duration of the X-ray pulse and the size of the radiation emitting area. A model describing the electron refluxing was verified via particle-in-cell simulations for non-relativistic electron energies. Using this model it was confirmed that the effect of the electron refluxing on the generated X-ray radiation depends on the target thickness and the target material. A considarable increase of the number of the emitted K-α photons is observed especially for thin targets made of low-Z materials, and for higher hot electron temperatures.

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1 Nukleonika

1 2015

1 Horný V.

1 Klimo O.

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Hot electron refluxing in the short intense laser pulse interactions with solid targets and its influence on K-α radiation