Electron pulse train accelerated by a linearly polarized Laguerre–Gaussian laser beam

Spontaneous emergence of non-planar electron orbits during direct laser acceleration by a linearly polarized laser pulse

Generating a quasiellipsoidal electron beam by 3D laser-pulse shaping.

A generic 3D laser-pulse-shaping scheme is proposed towards the generation of a uniform ellipsoidal particle distribution, an ideal distribution due to the linear dependence of the space-charge force on the particle position. The shaping is accomplished via spatiotemporal coupling of the laser dynamics via chromatic aberration in an optical lens. Particle tracking simulations show that the elec...

Wake "eld of electron beam accelerated in a RF-gun of free electron laser `ELSAa

Wake "eld e!ects driven by a coasting relativistic charged particle beam have been studied for various cavity geometries. In the particular case of a cylindrical `pill-boxa cavity, an analytical expression of the (E, B)(x, t) map has been obtained as a development on the complete base cavity normal modes. We extend this method to the case of an accelerated beam, which leaves the downstream face...

Anisotropy of electrons accelerated by a high-intensity laser pulse

We describe a realistic model for a focused high-intensity laser pulse in three dimensions. Relativistic dynamics of an electron submitted to such pulse is described by equations of motion with ponderomotive potential depending on a single free parameter in the problem, which we refer to as the “asymmetry parameter”. It is shown that the asymmetry parameter can be chosen to provide quantitative...

High-power spectral beam combining of linearly polarized Tm:fiber lasers.

To date, high-power scaling of Tm:fiber lasers has been accomplished by maximizing the power from a single fiber aperture. In this work, we investigate power scaling by spectral beam combination of three linearly polarized Tm:fiber MOPA lasers using dielectric mirrors with a steep transition from highly reflective to highly transmissive that enable a minimum wavelength separation of 6 nm betwee...