Thermal fluid closures and pressure anisotropies in numerical simulations of plasma wakefield acceleration
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arXiv
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| Autori principali: | , , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2024
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| Soggetti: | |
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| _version_ | 1866913501067345920 |
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| author | Simeoni, Daniele Rossi, Andrea Renato Parise, Gianmarco Guglietta, Fabio Sbragaglia, Mauro |
| author_facet | Simeoni, Daniele Rossi, Andrea Renato Parise, Gianmarco Guglietta, Fabio Sbragaglia, Mauro |
| contents | We investigate the dynamics of plasma-based acceleration processes with collisionless particle dynamics and non negligible thermal effects. We aim at assessing the applicability of fluid-like models, obtained by suitable closure assumptions applied to the relativistic kinetic equations, thus not suffering of statistical noise, even in presence of a finite temperature. The work here presented focuses on the characterization of pressure anisotropies, which crucially depend on the adopted closure scheme, and hence are useful to discern the appropriate thermal fluid model. To this aim, simulation results of spatially resolved fluid models with different thermal closure assumptions are compared with the results of particle-in-cell (PIC) simulations at changing temperature and amplitude of plasma oscillations. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_19635 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Thermal fluid closures and pressure anisotropies in numerical simulations of plasma wakefield acceleration Simeoni, Daniele Rossi, Andrea Renato Parise, Gianmarco Guglietta, Fabio Sbragaglia, Mauro Plasma Physics Accelerator Physics Computational Physics We investigate the dynamics of plasma-based acceleration processes with collisionless particle dynamics and non negligible thermal effects. We aim at assessing the applicability of fluid-like models, obtained by suitable closure assumptions applied to the relativistic kinetic equations, thus not suffering of statistical noise, even in presence of a finite temperature. The work here presented focuses on the characterization of pressure anisotropies, which crucially depend on the adopted closure scheme, and hence are useful to discern the appropriate thermal fluid model. To this aim, simulation results of spatially resolved fluid models with different thermal closure assumptions are compared with the results of particle-in-cell (PIC) simulations at changing temperature and amplitude of plasma oscillations. |
| title | Thermal fluid closures and pressure anisotropies in numerical simulations of plasma wakefield acceleration |
| topic | Plasma Physics Accelerator Physics Computational Physics |
| url | https://arxiv.org/abs/2404.19635 |