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Optimizing the electron acceleration in vacuum by chirped ultrashort laser pulse using particle swarm method

Published online by Cambridge University Press:  11 July 2019

Mohammad Rezaei-Pandari ,
Fazel Jahangiri Open the ORCID record for Fazel Jahangiri [Opens in a new window]  and
Ali Reza Niknam
Mohammad Rezaei-Pandari
Affiliation:
Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
Fazel Jahangiri*
Affiliation:
Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
Ali Reza Niknam
Affiliation:
Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran
*
Author for correspondence: Fazel Jahangiri, Laser and Plasma Research Institute, Shahid Beheshti University, Tehran, Iran, E-mail: [email protected]
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Abstract

Efficient electron acceleration by a linearly chirped ultrashort laser pulse in vacuum is investigated using the particle swarm optimization method. By applying this method for optimizing the initial parameters of the laser pulse, a pronounced increase in final energy gain of the electron is obtained compared to that expected from the successive optimization method. Our results also suggest that the value of the optimal chirp parameter is independent of laser polarization and the energy gain could be insensitive to the sign of this parameter when the initial phase is optimally adjusted. In addition, utilizing the chirped laser pulse with optimized conditions for acceleration of an electron bunch reveals that the energy spectrum is shifted to considerably higher energies and the spatial distribution is significantly improved in a polarization-dependent manner.

Keywords

Chirpelectron accelerationlaser pulsePSOvacuum
Type
Research Article
Information
Laser and Particle Beams , Volume 37 , Issue 3 , September 2019 , pp. 242 - 251
Copyright
Copyright © Cambridge University Press 2019 

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