Achieving High Polarization of Photons Emitted by Unpolarized Electrons in Ultrastrong Laser Fields
arxiv(2024)
摘要
Nonlinear Compton scattering driven by ultraintense lasers presents a
promising avenue for enhancing the photon energy, brilliance, and setup
compactness of γ-ray sources. However, a significant challenge lies in
achieving a high polarization degree with commonly generated unpolarized
electrons, thus addressing a longstanding puzzle in the field. Here we
investigate the polarization dynamics of photons emitted by an unpolarized
electron beam interacting with a counter-propagating ultraintense laser pulse
numerically, and propose a novel method to generate highly polarized γ
rays via nonlinear Compton scattering with the aid of vacuum dichroism effect.
Our simulations reveal that high-brilliance γ rays with polarization
beyond 90% are feasible in a single-shot interaction, rivaling the highest
achieved by any γ-ray sources to date, based on a developed Monte Carlo
method incorporating polarization-resolved tree processes of nonlinear Compton
scattering and Breit-Wheeler pair production and one-loop vacuum polarization.
This generation method showcases an extraordinary ultra-high polarization
degree and a user-friendly all-optical experimental setup, while harnessing the
high photon energy and brilliance characteristic of nonlinear Compton
scattering sources, thus making it of great potential for experimental
applications.
更多查看译文
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络
Chat Paper
正在生成论文摘要