2018/03/01 by Ratan Kumar Bera, Amita Das, Bera, Ratan Kumar +3
Earth and Planetary Sciences · Physics and Astronomy · #FOS: Physical sciences #High-pressure geophysics and materials #Laser-Plasma Interactions and Diagnostics #Magnetic confinement fusion research #Plasma Physics (physics.plasm-ph)
paper · pdf · doi:10.48550/arxiv.1803.00300
openalex publication_date 2018/03/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Fluid simulations, which are considerably simpler and faster, have been employed to study the behavior of the wakefield driven by a relativistic rigid beam in a 2-D cold plasma. When the transverse dimensions of the beam are chosen to be much larger than its longitudinal extent, a good agreement with our previous 1-D results [\textcolorred\it Physics of Plasmas 22, 073109 (2015)] are observed for both under-dense and over-dense beams. When the beam is overdense and its transverse extent is smaller or close to the longitudinal extension, the 2-D blow-out structure, observed in PIC simulations and analytically modeled by Lu et al. [\textcolorred\it Phys. Rev. Lett., 96, 165002 (2006)] are recovered. For quantitative assessment of particle acceleration in such a wake potential structure test electrons are employed. It is shown that the maximum energy gained by the test electrons placed at the back of the driver beam of energy ∼ 28.5 GeV, reaches up to 2.6 GeV in a 10 cm long plasma. These observations are consistent with the experimental results presented in ref. [\textcolorred\it Phys. Rev. Lett. 95, 054802 (2005)]. It is also demonstrated that the energy gained by the test electrons get doubled (∼ 5.2 GeV) when the test particles are placed near the axis at the end of the first blowout structure.