Stable Particle Acceleration in Coaxial Plasma Channels

The attainable transformer ratio in plasma accelerators is limited by instabilities. Using three-dimensional particle-in-cell simulations, we demonstrate that these can be controlled using a hollow plasma channel with a coaxial plasma filament. The driver scatters electrons from the filament, and th...

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Bibliographic Details
Published in:Physical review letters 2018-12, Vol.121 (26), p.264801-264801, Article 264801
Main Authors: Pukhov, Alexander, Farmer, John P
Format: Article
Language:English
Subjects:
Emittance
Particle acceleration
Particle accelerators
Particle in cell technique
Plasma
Plasma accelerators
Transformers
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Summary:The attainable transformer ratio in plasma accelerators is limited by instabilities. Using three-dimensional particle-in-cell simulations, we demonstrate that these can be controlled using a hollow plasma channel with a coaxial plasma filament. The driver scatters electrons from the filament, and the slow pinch of the ions leads to a strong chirp of the effective betatron frequency, preventing beam breakup. We demonstrate the monoenergetic acceleration of an electron bunch to 20 GeV over 4.4 m, achieving a transformer ratio of 10, an energy efficiency of 40%, and an emittance of 1.8  μm.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.121.264801