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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Generation and analysis of quasimonoenergetic electron beams by laser-plasma interaction in transitional region from the self-modulated laser wakefield to bubble acceleration regime
S. Masuda,Eisuke Miura +1 more
TL;DR: In this paper, the generation of quasimonoenergetic electron beams in a transitional region from the self-modulated laser wakefield to bubble acceleration regime is reported, where the electron density of 1.6×1019 cm−3 is obtained from a plasma with an electron density 1.8×108.
Journal ArticleDOI
Energy boost in laser wakefield accelerators using sharp density transitions
TL;DR: In this article, a phenomenological model was proposed to estimate the energy gain of a single and multiple stages of phase-locking in a particle-in-cell (PIC) system.
Journal ArticleDOI
Laser plasma accelerator driven by a super-Gaussian pulse
Tobias Ostermayr,Stefan Petrovics,Khalid Iqbal,Constantin Klier,Hartmut Ruhl,Kazuhisa Nakajima,Aihua Deng,Xiaomei Zhang,Baifei Shen,Jiansheng Liu,Ruxin Li,Zhizhan Xu,Toshiki Tajima +12 more
TL;DR: In this article, a super-Gaussian laser wakefield accelerator (LWFA) with a weak focusing force is considered to seek improved beam quality in LWFA, and the behavior of the electron beam dynamics and synchrotron radiation arising from the transverse betatron oscillations through analysis and computation is studied.
Journal ArticleDOI
Magnetically assisted self-injection and radiation generation for plasma based acceleration
Jorge Vieira,Joana Luis Martins,Vishwa Bandhu Pathak,Ricardo Fonseca,Ricardo Fonseca,Warren Mori,Luis O. Silva +6 more
TL;DR: In this article, it is shown through analytical modeling and numerical simulations that external magnetic fields can relax the self-trapping thresholds in plasma-based accelerators and that the transverse location where selftrapping occurs can be selected by adequate choice of the spatial profile of the external magnetic field.
Journal ArticleDOI
Controlled ionization-induced injection by tailoring the gas-density profile in laser wakefield acceleration
Ming Zeng,Nasr A. M. Hafz,Kazuhisa Nakajima,Liming Chen,Wei Lu,Warren Mori,Zheng-Ming Sheng,Jie Zhang +7 more
TL;DR: In this paper, the authors used 2 1/2D OSIRIS simulations to study the injection process of a laser-driven wakefield into a gas mixture of helium and nitrogen with gas density of each rising linearly from 0 to a peak.
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