Generating multi-GeV electron bunches using single stage laser wakefield acceleration in a 3D nonlinear regime
Wei Lu,Michail Tzoufras,C. Joshi,Frank Tsung,Warren Mori,Jorge Vieira,Ricardo Fonseca,Luis O. Silva +7 more
TLDR
In this article, a phenomenological framework for laser wakefield acceleration (LWFA) in the 3D nonlinear regime was developed, in which the plasma electrons are expelled by the radiation pressure of a short pulse laser, leading to nearly complete blowout.Abstract:
The extraordinary ability of space-charge waves in plasmas to accelerate charged particles at gradients that are orders of magnitude greater than in current accelerators has been well documented. We develop a phenomenological framework for laser wakefield acceleration (LWFA) in the 3D nonlinear regime, in which the plasma electrons are expelled by the radiation pressure of a short pulse laser, leading to nearly complete blowout. Our theory provides a recipe for designing a LWFA for given laser and plasma parameters and estimates the number and the energy of the accelerated electrons whether self-injected or externally injected. These formulas apply for self-guided as well as externally guided pulses (e.g. by plasma channels). We demonstrate our results by presenting a sample particle-in-cell (PIC) simulation of a $30\text{ }\mathrm{fs}$, 200 TW laser interacting with a 0.75 cm long plasma with density $1.5\ifmmode\times\else\texttimes\fi{}{10}^{18}\text{ }\text{ }{\mathrm{cm}}^{\ensuremath{-}3}$ to produce an ultrashort (10 fs) monoenergetic bunch of self-injected electrons at 1.5 GeV with 0.3 nC of charge. For future higher-energy accelerator applications, we propose a parameter space, which is distinct from that described by Gordienko and Pukhov [Phys. Plasmas 12, 043109 (2005)] in that it involves lower plasma densities and wider spot sizes while keeping the intensity relatively constant. We find that this helps increase the output electron beam energy while keeping the efficiency high.read more
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Betatron x-ray generation from electrons accelerated in a plasma cavity in the presence of laser fields
TL;DR: In this article, the effects of the interaction of the laser pulse with trapped electrons, as well as betatron oscillations in an electroncavity, is directly evaluated using semianalytic calculations of high energy photons.
Journal ArticleDOI
Laser-driven generation of collimated ultra-relativistic positron beams
Gianluca Sarri,William Schumaker,A. Di Piazza,Kristjan Poder,Jason Cole,M. Vargas,Domenico Doria,S. Kushel,Brendan Dromey,G. Grittani,L. A. Gizzi,Mark E Dieckmann,A. Green,Vladimir Chvykov,Anatoly Maksimchuk,V. Yanovsky,Z. H. He,Bixue Hou,John Nees,Satyabrata Kar,Zulfikar Najmudin,Alexander Thomas,Christoph H. Keitel,Karl Krushelnick,Matthew Zepf,Matthew Zepf +25 more
TL;DR: In this paper, it was shown that the divergence of the escaping positron beam is of the order of the inverse of its Lorentz factor for thicker solid targets, but the divergence is still kept of a few tens of mrad, depending on the spectral components in the beam.
Journal ArticleDOI
Laser plasma acceleration of electrons with multi-PW laser beams in the frame of CILEX
Brigitte Cros,B. S. Paradkar,Xavier Davoine,A. Chancé,F. G. Desforges,S. Dobosz-Dufrenoy,Nicolas Delerue,J. Ju,T. L. Audet,Gilles Maynard,M. Lobet,Laurent Gremillet,Patrick Mora,J. Schwindling,O. Delferrière,C. Bruni,Cecile Rimbault,T. Vinatier,A. Di Piazza,Mickael Grech,Caterina Riconda,Jean-Raphael Marques,Arnaud Beck,A. Specka,Ph. Martin,P. Monot,D. Normand,Fabrice Mathieu,P. Audebert,François Amiranoff +29 more
TL;DR: In this article, the Apollon-10P laser has been used to deliver two beams at the 1 and 10P levels, in ultra-short ( > 15 fs ) pulses, to a target area dedicated to electron acceleration studies, such as the exploration of the nonlinear regimes predicted theoretically, or multi-stage laser plasma acceleration.
Journal ArticleDOI
Onset of self-steepening of intense laser pulses in plasmas
TL;DR: In this paper, the self-steepening of laser pulses with intensities in excess of 1018 W cm-2 and with typical durations shorter than 30 fs propagating in underdense plasmas is examined by resorting to the framework of photon kinetics.
Journal ArticleDOI
Characterization of the beam loading effects in a laser plasma accelerator
Clément Rechatin,Jérôme Faure,Xavier Davoine,Olle Lundh,J. Lim,Ahmed Ben-Ismaïl,Frédéric Burgy,Amar Tafzi,A. Lifschitz,A. Lifschitz,Eric Lefebvre,Victor Malka +11 more
TL;DR: In this article, electrons were injected into a laser plasma accelerator using colliding laser pulses, and the amount of charge accelerated in the plasma wave could be controlled by varying the parameters of the injection laser pulse.
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