Observation of quasi mono-energetic electron bunches in the new ellipsoid cavity model

Abstract

In this work, we introduce a new ellipsoid model to describe bubble acceleration of electrons and discuss the required conditions of forming it. We have found that the electron trajectory is strongly related to background electron energy and cavity potential ratio. In the ellipsoid cavity regime, the quality of the electron beam is improved in contrast to other methods, such as that using periodic plasma wakefield, spherical cavity regime, and plasma channel guided acceleration. The trajectory of the electron motion can be described as hyperbola, parabola, or ellipsoid path. It is influenced by the position and energy of the electrons and the electrostatic potential of the cavity. In the experimental part of this work, a 20 TW power and 30 fs laser pulse was focused on a pulsed He gas jet. We have focused the laser pulse in the best matched point above the nozzle gas to obtain a stable ellipsoid bubble. The finding of the optimum points will be described in analytical details.

Energy Evaluation of Mono‐Energetic Electron Beam Produced by Ellipsoid Cavity Model in the Bubble Regime

“…Our analytical model is in agreement with the PIC [19] and experimental results [21]. We derived the maximum energy of electrons.…”

The effects of circularly polarized laser pulse on generated electron nano-bunches in oscillating mirror model

“…The recent rapid advances in ultra-intense short pulse lasers and their numerous applications stimulated the research activities in this field such as generation of high energy electron and ion beams and their acceleration (Kawata et al, 2005;Mangles et al, 2006;Chyla, 2006;Bessonov et al, 2008;Sadighi-Bonabi et al, 2010sc, 2011 mono-energetic electron beam (Glinec et al, 2005;Zobdeh et al, 2008;Sadighi-Bonabi et al, 2009a;2010a;2010b), monoenergetic ion beam generation (Badziak, 2005), X-ray emission (Nikzad et al, 2012), high harmonic generation, and X-ray lasers (L'Huillier et al, 1993). Among all possible applications of laser, produced X-rays are useful for inertial confinement fusion (ICF) (Keith Matzen et al, 2005;Yazdani et al, 2009;Sadighi-Bonabi et al, 2010d), which is the most challenging problem.…”

Investigation by simulation of X-ray beams produced via interactions of suitable quasi-monoenergetic electrons with solid targets

“…Simulated X-ray production, by utilizing electrons with various energy distributions, from lead targets of various thicknesses is analyzed. For quasi-monoenergetic electron profiles, the effects of two parameters: pulse width or FWHM (ΔE) and peak energy (E p ) are studied on X-ray production by using experimental profiles [25] and hypothetical spectra. The results are discussed in detail.…”