Evolution of the self-injection process in the transition of an LWFA from self-modulation to blowout regime
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arXiv
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| Format: | Preprint |
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2020
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| author | Kumar, Prabhat Yu, Kwangmin Zgadzaj, Rafal Downer, Michael Petrushina, Irina Samulyak, Roman Litvinenko, Vladimir Vafaei-Najafabadi, Navid |
| author_facet | Kumar, Prabhat Yu, Kwangmin Zgadzaj, Rafal Downer, Michael Petrushina, Irina Samulyak, Roman Litvinenko, Vladimir Vafaei-Najafabadi, Navid |
| contents | Long wavelength infrared (LWIR) laser driven plasma wakefield accelerators are investigated here in the self-modulated laser wakefield acceleration (SM-LWFA) and blowout regimes using 3D Particle-in-Cell simulations. The simulation results show that in SM-LWFA regime, self-injection arises with wave breaking, whereas in the blowout regime, self-injection is not observed under the simulation conditions. The wave breaking process in SM-LWFA regime occurs at a field strength that is significantly below the 1D wave-breaking threshold. This process intensifies at higher laser power and plasma density and is suppressed at low plasma densities ($\leq 1\times10^{17}$ $cm^{-3}$ here). The produced electrons show spatial modulations with a period matching that of the laser wavelength, which is a clear signature of direct laser acceleration (DLA). |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2008_12157 |
| institution | arXiv |
| publishDate | 2020 |
| record_format | arxiv |
| spellingShingle | Evolution of the self-injection process in the transition of an LWFA from self-modulation to blowout regime Kumar, Prabhat Yu, Kwangmin Zgadzaj, Rafal Downer, Michael Petrushina, Irina Samulyak, Roman Litvinenko, Vladimir Vafaei-Najafabadi, Navid Plasma Physics Long wavelength infrared (LWIR) laser driven plasma wakefield accelerators are investigated here in the self-modulated laser wakefield acceleration (SM-LWFA) and blowout regimes using 3D Particle-in-Cell simulations. The simulation results show that in SM-LWFA regime, self-injection arises with wave breaking, whereas in the blowout regime, self-injection is not observed under the simulation conditions. The wave breaking process in SM-LWFA regime occurs at a field strength that is significantly below the 1D wave-breaking threshold. This process intensifies at higher laser power and plasma density and is suppressed at low plasma densities ($\leq 1\times10^{17}$ $cm^{-3}$ here). The produced electrons show spatial modulations with a period matching that of the laser wavelength, which is a clear signature of direct laser acceleration (DLA). |
| title | Evolution of the self-injection process in the transition of an LWFA from self-modulation to blowout regime |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2008.12157 |