Study of quasimonoenergetic electron bunch generation in self-modulated laser wakefield acceleration using TW or sub-TW ultrashort laser pulses
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This work presents a study on laser wakefield electron acceleration in the self-modulated regime (SM-LWFA) using 50-fs laser pulses with
energy on the mJ scale, at λ = 0.8 μm, impinging on a thin H2 gas jet. Particle-in-cell simulations were performed using laser peak powers
ranging from sub-terawatt to a few terawatts and plasma densities varying from the relativistic self-focusing threshold up to values
close to the critical density. The differences in the obtained acceleration processes are discussed. Results show that bunched electron beams
with full charge on the nC scale and kinetic energy in the MeV range can be produced and configurations with peak density in the range
0.5–5 × 1020 atoms/cm3 generate electrons with maximum energies. In this range, some simulations generated quasimonoenergetic bunches
with ∼0.5% of the total accelerated charge and we show that the beam characteristics, process dynamics, and operational parameters are close
to those expected for the blowout regime. The configurations that led to quasimonoenergetic bunches from the sub-TW SM-LWFA regime
allow the use of laser systems with repetition rates in the kHz range, which can be beneficial for practical applications.
Como referenciar
MALDONADO, E.P.; SAMAD, R.E.; BONATTO, A.; NUNES, R.P.; BANERJEE, S.; VIEIRA JUNIOR, N.D. Study of quasimonoenergetic electron bunch generation in self-modulated laser wakefield acceleration using TW or sub-TW ultrashort laser pulses. AIP Advances, v. 11, n. 6, p. 065116-1 - 065116-10, 2021. DOI: 10.1063/5.0052831. Disponível em: http://repositorio.ipen.br/handle/123456789/32310. Acesso em: 30 Dec 2025.
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