The effect of laser pulse evolution on down-ramp injection in laser wakefield accelerators.

Autor: Jain A; Department of Physics and Astrophysics, University of Delhi, Delhi, 110 007, India., Yoffe SR; Department of Physics, SUPA and University of Strathclyde, Glasgow, G4 0NG, UK., Ersfeld B; Department of Physics, SUPA and University of Strathclyde, Glasgow, G4 0NG, UK., Holt GK; Department of Physics, SUPA and University of Strathclyde, Glasgow, G4 0NG, UK., Gupta DN; Department of Physics and Astrophysics, University of Delhi, Delhi, 110 007, India. dngupta@physics.du.ac.in., Jaroszynski DA; Department of Physics, SUPA and University of Strathclyde, Glasgow, G4 0NG, UK. d.a.jaroszynski@strath.ac.uk.
Jazyk: angličtina
Zdroj: Scientific reports [Sci Rep] 2024 Aug 19; Vol. 14 (1), pp. 19127. Date of Electronic Publication: 2024 Aug 19.
DOI: 10.1038/s41598-024-69049-4
Abstrakt: Electron self-injection in laser wakefield accelerators (LWFAs) is an important determinator of electron beam parameters. Controllable and adjustable LWFA beams are essential for applications. Controlled injection by capturing sheath electrons can be achieved using plasma density down-ramps or bumps, which perturb the LWFA bubble phase velocity by varying the plasma frequency and by affecting relativistic self-focussing of the laser. We report on a comprehensive study, using particle-in-cell simulations, of the effect of laser pulse evolution on injection on density perturbations. We show how the LWFA can be optimised to make it suitable for use in a wide range of applications, in particular those requiring short duration, low slice-emittance and low energy spread, and high-charge electron bunches.
(© 2024. The Author(s).)
Databáze: MEDLINE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje