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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 | Abstract: | QED 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 | Services: | Forum | Review | PDF | Favorites |
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