Multistage Coupling of Laser-Wakefield Accelerators with Curved Plasma Channels

Multistage coupling of laser-wakefield accelerators is essential to overcome laser energy depletion for high-energy applications such as TeV-level electron-positron colliders. Current staging schemes feed subsequent laser pulses into stages using plasma mirrors while controlling electron beam focusi...

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Bibliographic Details
Published in:Physical review letters 2018-04, Vol.120 (15), p.154801-154801, Article 154801
Main Authors: Luo, J, Chen, M, Wu, W Y, Weng, S M, Sheng, Z M, Schroeder, C B, Jaroszynski, D A, Esarey, E, Leemans, W P, Mori, W B, Zhang, J
Format: Article
Language:English
Subjects:
Acceleration
Coupling
Curved beams
Electron beams
Laser beams
Lasers
Multistage
Particle accelerators
Particle in cell technique
Plasma
Straight channels
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Summary:Multistage coupling of laser-wakefield accelerators is essential to overcome laser energy depletion for high-energy applications such as TeV-level electron-positron colliders. Current staging schemes feed subsequent laser pulses into stages using plasma mirrors while controlling electron beam focusing with plasma lenses. Here a more compact and efficient scheme is proposed to realize the simultaneous coupling of the electron beam and the laser pulse into a second stage. A partly curved channel, integrating a straight acceleration stage with a curved transition segment, is used to guide a fresh laser pulse into a subsequent straight channel, while the electrons continue straight. This scheme benefits from a shorter coupling distance and continuous guiding of the electrons in plasma while suppressing transverse beam dispersion. Particle-in-cell simulations demonstrate that the electron beam from a previous stage can be efficiently injected into a subsequent stage for further acceleration while maintaining high capture efficiency, stability, and beam quality.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.120.154801