Generating multi-GeV electron bunches using single stage laser wakefield acceleration in a 3D nonlinear regime
By Wei Lu, M. Tzoufras, C. Joshi, F. Tsung, W. Mori, J. Vieira, R. Fonseca, Luís O. Silva. 2006
804 citations recorded by the source corpus.
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.
Subfields: Atomic and Molecular Physics, and Optics, Mechanics of Materials, Nuclear and High Energy Physics
View Paper: https://www.semanticscholar.org/paper/2c48a3246e69adc606a9fdc185832b26100146a2
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Citations in the corpus
- Diagnostics for plasma-based electron accelerators (2018, background): “Using 3D simulations, (Lu et al., 2007) comprehensively documented properties of bubble-regime LWFAs over a wide range of laser-plasma parameters.”
- Gamma-rays from harmonically resonant betatron oscillations in a plasma wake (2011, background): “, the LWFA structure has an approximately spherical bubble shape with a radius of , which is primarily determined by the normalized laser vector potential, a 0 = e A / m e c 2 and the plasma frequency, , where n p is the plasma density, e , the electron charge and m e , t”
- GeV-scale electron acceleration in a gas-filled capillary discharge waveguide (2007, background): “A relativistically self-focused laser pulse will drive a nonlinear plasma wave, and as such will experience longitudinal and transverse variations of the plasma density; at the front of the laser pulse the transverse density profile tends to cancel the effect of relativistic self-focusing, and hence”
- Femtosecond x rays from laser-plasma accelerators (2013, positive): “The phase velocity of the wake is expressed L is the etching velocity due to local pump depletion (Decker and Mori, 1994, 1995; Decker et al. , 1996; Lu et al. , 2007), ! ffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffiffi p p ¼ n e e 2 =m(cid”
- Applications of laser wakefield accelerator-based light sources (2016, methodology): “In the 3D nonlinear regime [38, 39, 40], it has been shown that the transverse size of the structure is dictated by self-focusing of the laser pulse and scales as 1/ωp.”
- Bright spatially coherent synchrotron X-rays from a table-top source (2010, background): “The average and maximum energy of the electron beam follow the typical wakefield electron density scaling la”
- Relativistic electron beams driven by kHz single-cycle light pulses (2016, background): “5×1020 cm−3, which, according to scaling laws [21] leads to acceleration of electrons in the 10 MeV range.”
- Principles and applications of compact laser–plasma accelerators (2008, background): “These laws predict that multi-gigaelectronvolt electron beams with nanocoulomb charges might be attainable with the next laser generatio”