https://doi.org/10.1140/epjp/s13360-025-06061-1
Regular Article
Effect of frequency-chirped ionization laser on accelerated electron beam characteristics in plasma wakefield acceleration
1
Department of Physics, Lovely Professional University, G.T. Road, 144411, Phagwara, Punjab, India
2
Department of Sciences (Physics), Manav Rachna University (MRU), 121004, Faridabad, India
3
Department of Physics, Allahabad University, Allahabad, Uttar Pradesh, India
a
sandeepkumar@mru.edu.in
b
jyoti_physics@yahoo.co.in
Received:
12
May
2024
Accepted:
24
January
2025
Published online:
17
February
2025
Trojan Horse underdense photocathode plasma wakefield acceleration is an effective technique for generating ultralow-emittance electron bunches. In this study, we investigate the impact of frequency chirp in the ionization laser on the properties of the accelerated electron bunches using two-dimensional (2D) particle-in-cell (PIC) simulations. It is found that the total charge of the high-energy electrons produced in the acceleration process depends strongly on the magnitude and the sign of frequency chirp in ionization laser. For an un-chirped ionization laser, an electron bunch gets a maximum acceleration of up to 400 MeV with bunch current 
. However, the use of a negative-chirped ionization laser shows lower energy gain, i.e., 200 MeV with an enhanced bunch current 
, with normalized emittance 
in 7.5-mm-long plasma channel. Such high current electron bunches will be useful for compact hard X-ray free-electron laser (FEL) sources.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
