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| Auteurs principaux: | , |
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| Format: | Preprint |
| Publié: |
2024
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| Accès en ligne: | https://arxiv.org/abs/2405.04140 |
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| _version_ | 1866909707092885504 |
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| author | Song, Huai-Hang Sheng, Zheng-Ming |
| author_facet | Song, Huai-Hang Sheng, Zheng-Ming |
| contents | The linear Breit-Wheeler (LBW) process, mediated by photon-photon collisions, can emerge as the dominant pair production mechanism in the ultraintense laser-plasma interaction for laser intensities below $10^{23}~\rm W/cm^2$. Here, we explore the role of photon polarization in LBW pair production for a 10 PW-class, linearly polarized laser interacting with a solid-density plasma. The motivation for this investigation lies in two main aspects: photons emitted via nonlinear Compton scattering are inherently linearly polarized, and the LBW process exhibits a distinct sensitivity to photon polarization. By leveraging particle-in-cell simulations that self-consistently incorporate photon-polarization-resolved LBW pair production, our results reveal that photon polarization leads to a 5\% to 10\% reduction in the total LBW positron yield. This suppression arises because the polarization directions of the colliding photons are primarily parallel to each other, resulting in a diminished LBW cross section compared to the unpolarized case. The influence of photon polarization weakens as the laser intensity increases. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2405_04140 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Photon-polarization-resolved linear Breit-Wheeler pair production in a laser-plasma system Song, Huai-Hang Sheng, Zheng-Ming Plasma Physics The linear Breit-Wheeler (LBW) process, mediated by photon-photon collisions, can emerge as the dominant pair production mechanism in the ultraintense laser-plasma interaction for laser intensities below $10^{23}~\rm W/cm^2$. Here, we explore the role of photon polarization in LBW pair production for a 10 PW-class, linearly polarized laser interacting with a solid-density plasma. The motivation for this investigation lies in two main aspects: photons emitted via nonlinear Compton scattering are inherently linearly polarized, and the LBW process exhibits a distinct sensitivity to photon polarization. By leveraging particle-in-cell simulations that self-consistently incorporate photon-polarization-resolved LBW pair production, our results reveal that photon polarization leads to a 5\% to 10\% reduction in the total LBW positron yield. This suppression arises because the polarization directions of the colliding photons are primarily parallel to each other, resulting in a diminished LBW cross section compared to the unpolarized case. The influence of photon polarization weakens as the laser intensity increases. |
| title | Photon-polarization-resolved linear Breit-Wheeler pair production in a laser-plasma system |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2405.04140 |