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29 March 2024
 
  » arxiv » 1505.6680

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Optimized multibeam configuration for observation of QED cascades
E. G. Gelfer ; A. A. Mironov ; A. M. Fedotov ; V. F. Bashmakov ; E. N. Nerush ; I. Y. Kostyukov ; N. B. Narozhny ;
Date 25 May 2015
AbstractQED cascades in intense electromagnetic field can occur if the dynamical quantum parameter $chi$ of a seed electron, which in Compton units coincides with the electron proper acceleration, attains the order of unity. We derive general expression for $chi$ of an initially slow electron in an arbitrary electromagnetic field for a time range $tll 1/omega$, where $omega$ is the field carrier frequency. Using this formula, we consider a special field configuration of multiple colliding focused laser beams and optimize it to provide cascade development at laser power below $10$ PW and intensity of the order of $10^{23}$W/cm$^2$. Such parameters of the beams will be obtained with a new generation of laser facilities, particularly the ELI Beamlines, in the coming years.
Source arXiv, 1505.6680
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