Abstract
The pulses collision scheme has been demonstrated to be an effective way for the Breit–Wheeler positron generation. In this work, positron generation via two circularly polarized laser pulses colliding in near-critical-density plasmas with different thicknesses is further studied. The results show that high flux and high density positrons are generated and collected in 14 μm thick plasmas as extra backflow electrons contribute to radiation. Though the positron yield in 4 μm thick plasmas is lower than that in the thick plasmas, partial positrons are accelerated out of the collision region with a small divergence and quasi-monoenergetic energy. It is found that the Lorentz field dominates positron acceleration and collection. This investigation will further facilitate quality positron generation and application.
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call