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Gamma-ray generation in ultrahigh-intensity laser-foil interactions | | E. N. Nerush
; I. Yu. Kostyukov
; L. Ji
; A. Pukhov
; | | Date: |
6 Sep 2013 | | Abstract: | Incoherent photon emission by ultrarelativistic electrons in the normal
incidence of a laser pulse on a foil is investigated by means of
three-dimensional numerical simulations in the range of intensities $2 imes
10^{21} ext{--} 2 imes 10^{25} ext{W} , ext{cm}^{-2}$ and electron
densities $2 imes 10^{22} ext{--} 1 imes 10^{24} ext{cm}^{-3}$. We
focus on properties of the resulting synchrotron radiation, such as its overall
energy, directivity of the radiation pattern and slope of the energy spectrum.
Regimes of laser-foil interactions are studied in the framework of a simple
analytical model. The laser-plasma parameters for efficient gamma-ray
generation are found and revealed to be close to the parameters for
relativistic foil motion. It is shown that in the case of oblique incidence of
a $3 ext{PW}$, $10 ext{fs}$ laser pulse on a thin foil about $10^{8}
ext{photons}/0.1% ext{bandwidth}$ are produced at the energy level of $1
ext{MeV}$ that significantly exceeds performance of the modern Compton
gamma-ray sources. Various applications of the gamma-ray bunches are discussed. | | Source: | arXiv, 1309.1648 | | Services: | Forum | Review | PDF | Favorites | |
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