Ionization injection in a laser wakefield accelerator subject to a transverse magnetic field
Abstract
The effect of an external transverse magnetic field on ionization injection of electrons in a laser wakefield accelerator (LWFA) is investigated by theoretical analysis and particle-in-cell simulations. On application of a few tens of Tesla magnetic field, both the electron trapping condition and the wakefield structure changes significantly such that injection occurs over a shorter distance and at an enhanced rate. Furthermore, beam loading is compensated for, as a result of the intrinsic trapezoidal-shaped longitudinal charge density profile of injected electrons. The nonlinear ionization injection and consequent compensation of beam loading lead to a reduction in the energy spread and an enhancement of both the charge and final peak energy of the electron beam from a LWFA immersed in the magnetic field.
Keywords
Cite
@article{arxiv.1802.01926,
title = {Ionization injection in a laser wakefield accelerator subject to a transverse magnetic field},
author = {Q. Zhao and S. M. Weng and Z. M. Sheng and M. Chen and G. B. Zhang and W. B. Mori and B. Hidding and D. A. Jaroszynski and J. Zhang},
journal= {arXiv preprint arXiv:1802.01926},
year = {2018}
}
Comments
15 pages, 7 figures