Journal ArticleDOI
Effect of laser polarization on quantum electrodynamical cascading
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In this article, the development of quantum electrodynamical (QED) cascades in a standing electromagnetic wave for circular and linear polarizations is simulated numerically with a 3D PIC-MC code.Abstract:
Development of quantum electrodynamical (QED) cascades in a standing electromagnetic wave for circular and linear polarizations is simulated numerically with a 3D PIC-MC code. It is demonstrated that for the same laser energy the number of particles produced in a circularly polarized field is greater than in a linearly polarized field, though the acquiring mean energy per particle is larger in the latter case. The qualitative model of laser-assisted QED cascades is extended by including the effect of polarization of the field. It turns out that cascade dynamics is notably more complicated in the case of linearly polarized field, where separation into the qualitatively different “electric” and “magnetic” regions (where the electric field is stronger than the magnetic field and vice versa) becomes essential. In the “magnetic” regions, acceleration is suppressed, and moreover the high-energy electrons are even getting cooled by photon emission. The volumes of the “electric” and “magnetic” regions evolve periodically in time and so does the cascade growth rate. In contrast to the linear polarization, the charged particles can be accelerated by circularly polarized wave even in “magnetic region.” The “electric” and “magnetic” regions do not evolve in time, and cascade growth rate almost does not depend on time for circular polarization.read more
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Laser absorption via quantum electrodynamics cascades in counter propagating laser pulses
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Journal ArticleDOI
Laser absorption via QED cascades in counter propagating laser pulses
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Journal ArticleDOI
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Journal ArticleDOI
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J. K. Daugherty,Alice K. Harding +1 more
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Journal ArticleDOI
QED cascades induced by circularly polarized laser fields
N. V. Elkina,Alexander Fedotov,I. Yu. Kostyukov,M. V. Legkov,N. B. Narozhny,E. N. Nerush,Hartmut Ruhl +6 more
TL;DR: In this article, the results of Monte-Carlo simulations of electron-positron-photon cascades initiated by slow electrons in circularly polarized fields of ultrahigh strength are presented and discussed.