Wei, Y, Xia, G, Smith, JDA and Welsch, CP ORCID: 0000-0001-7085-0973
(2017)
Dual-gratings with a Bragg reflector for dielectric laser-driven accelerators.
PHYSICS OF PLASMAS, 24 (7).
073115-.
Text
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Abstract
<jats:p>The acceleration of a beam of electrons has been observed in a dielectric laser-driven accelerator with a gradient of 300 MV/m. It opens the way to building a particle accelerator “on a chip” much more cheaply than a conventional one. This paper investigates numerically an efficient dielectric laser-driven accelerating structure, based on dual-gratings with a Bragg reflector. The design of the structure boosts the accelerating field in the channel, thereby increasing the accelerating gradient by more than 70% compared to bare dual-gratings, from analytical calculations. This is supported by two-dimensional (2D) particle-in-cell simulations, where a 50 MeV electron bunch is loaded into an optimized 100-period structure to interact with a 100 fs pulsed laser having a peak field of 2 GV/m. It demonstrates a loaded accelerating gradient of 1.48 ± 0.10 GV/m, which is (85 ± 26)% higher than that of bare dual-gratings. In addition, studies of the diffraction effect show that the optimized structure should be fabricated with a vertical size of J/wx ≥ 0.20 in order to generate an acceptable accelerating performance.</jats:p>
Item Type: | Article |
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Depositing User: | Symplectic Admin |
Date Deposited: | 14 Jul 2017 08:08 |
Last Modified: | 15 Mar 2024 11:03 |
DOI: | 10.1063/1.4993206 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3008455 |