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
Citations
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Dephasingless laser wakefield acceleration
John Palastro,Jessica Shaw,D. Ramsey,T. T. Simpson,P. Franke,S. T. Ivancic,K. Daub,D.H. Froula +7 more
TL;DR: Simulations in the linear regime and scaling laws in the bubble regime illustrate that this dephasingless LWFA can accelerate electrons to high energies in much shorter distances than a traditional LWFA-a single 4.5 m stage can accelerated electrons to TeV energies without the need for guiding structures.
Journal ArticleDOI
Investigation of GeV-scale electron acceleration in a gas-filled capillary discharge waveguide
P A Walker,Nicolas Bourgeois,Wolf Rittershofer,J. Cowley,N. Kajumba,Andreas Maier,Johannes Wenz,C. M. Werle,Stefan Karsch,Florian Grüner,Dan Symes,P. P. Rajeev,S. J. Hawkes,Oleg Chekhlov,C. J. Hooker,B. Parry,Y. Tang,Simon M. Hooker +17 more
TL;DR: In this article, the reproducibility of GeV-scale electron beams in a gas-filled capillary discharge waveguide was investigated and two methods for correcting the effect of beam pointing variations on the measured energy spectrum were described.
Journal ArticleDOI
Laser wakefield acceleration at reduced density in the self-guided regimea)
J. E. Ralph,C. E. Clayton,Felicie Albert,B. B. Pollock,Samuel Martins,Arthur Pak,K. A. Marsh,Jessica Shaw,A. Till,John Palastro,Wei Lu,S. H. Glenzer,L. O. Silva,Warren Mori,C. Joshi,D.H. Froula +15 more
TL;DR: In this article, the self-trapped charge in a helium plasma was shown to fall off with decreasing electron density with a threshold at 2.5×1018 cm−3, below which no charge is measured above 100 MeV.
Journal ArticleDOI
Concept of a laser-plasma based electron source for sub-10 fs electron diffraction
TL;DR: In this article, an electron source for ultrafast electron diffraction with sub-10-fs temporal resolution was proposed, which was demonstrated using Particle-In-Cell simulations.
Journal ArticleDOI
Energy spread minimization in a cascaded laser wakefield accelerator via velocity bunching
Zhijun Zhang,Wentao Li,Jiansheng Liu,Jiansheng Liu,Wentao Wang,Changhai Yu,Ye Tian,Kazuhisa Nakajima,Aihua Deng,Rong Qi,Cheng Wang,Zhiyong Qin,Ming Fang,Jiaqi Liu,Changquan Xia,Ruxin Li,Zhizhan Xu +16 more
TL;DR: In this paper, the authors proposed a scheme to minimize the energy spread of an electron beam (e-beam) in a cascaded laser wakefield accelerator to the one-thousandth level by inserting a stage to compress its longitudinal spatial distribution.
References
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Laser Electron Accelerator
Toshiki Tajima,John M. Dawson +1 more
TL;DR: In this paper, an intense electromagnetic pulse can create a weak of plasma oscillations through the action of the nonlinear ponderomotive force, and electrons trapped in the wake can be accelerated to high energy.
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A laser-plasma accelerator producing monoenergetic electron beams
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TL;DR: It is demonstrated that this randomization of electrons in phase space can be suppressed and that the quality of the electron beams can be dramatically enhanced.
Journal ArticleDOI
High-quality electron beams from a laser wakefield accelerator using plasma-channel guiding
C. G. R. Geddes,C. G. R. Geddes,Cs. Toth,van J Jeroen Tilborg,van J Jeroen Tilborg,Eric Esarey,Carl Schroeder,David L. Bruhwiler,Chet Nieter,John R. Cary,Wim Leemans +10 more
TL;DR: A laser accelerator that produces electron beams with an energy spread of a few per cent, low emittance and increased energy (more than 109 electrons above 80 MeV) and opens the way for compact and tunable high-brightness sources of electrons and radiation.