Achieving High Polarization of Photons Emitted by Unpolarized Electrons in Ultrastrong Laser Fields
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| _version_ | 1866914748722839552 |
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| author | Wu, Xian-Zhang Li, Yan-Fei Li, Yu-Tong |
| author_facet | Wu, Xian-Zhang Li, Yan-Fei Li, Yu-Tong |
| contents | 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. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_07038 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Achieving High Polarization of Photons Emitted by Unpolarized Electrons in Ultrastrong Laser Fields Wu, Xian-Zhang Li, Yan-Fei Li, Yu-Tong Plasma Physics 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. |
| title | Achieving High Polarization of Photons Emitted by Unpolarized Electrons in Ultrastrong Laser Fields |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2404.07038 |