Ionization injection in a laser wakefield accelerator subject to a transverse magnetic field
arXiv:1802.01926 · doi:10.1088/1367-2630/aac926
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.
arXiv comment15 pages, 7 figures
References in corpus (8)
- Beam loading in the nonlinear regime of plasma-based acceleration
- Observation of beam loading in a laser-plasma accelerator
- Multi-chromatic narrow-energy-spread electron bunches from laser wakefield acceleration with dual-color lasers
- Magnetic control of particle-injection in plasma based accelerators
- Self-truncated ionization injection and consequent monoenergetic electron bunches in laser wakefield acceleration
- Phase Space Dynamics of Ionization Injection in Plasma Based Accelerators
- Extreme case of Faraday effect: magnetic splitting of ultrashort laser pulses in plasmas
- Nano-scale electron bunching in laser-triggered ionization injection in plasma accelerators