Compact Multistage Plasma-Based Accelerator Design for Correlated Energy Spread Compensation

The extreme electromagnetic fields sustained by plasma-based accelerators could drastically reduce the size and cost of future accelerator facilities. However, they are also an inherent source of correlated energy spread in the produced beams, which severely limits the usability of these devices. We...

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Bibliographic Details
Published in:Physical review letters 2019-08, Vol.123 (5), p.054801-054801, Article 054801
Main Authors: Ferran Pousa, A, Martinez de la Ossa, A, Brinkmann, R, Assmann, R W
Format: Article
Language:English
Subjects:
Acceleration
Accelerators
Beams (radiation)
Correlation
Electromagnetic fields
Emittance
Free electron lasers
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Summary:The extreme electromagnetic fields sustained by plasma-based accelerators could drastically reduce the size and cost of future accelerator facilities. However, they are also an inherent source of correlated energy spread in the produced beams, which severely limits the usability of these devices. We propose here to split the acceleration process into two plasma stages joined by a magnetic chicane in which the energy correlation induced in the first stage is inverted such that it can be naturally compensated in the second. Simulations of a particular 1.5-m-long setup show that 5.5 GeV beams with relative energy spreads of 1.2×10^{-3} (total) and 2.8×10^{-4} (slice) could be achieved while preserving a submicron emittance. This is at least one order of magnitude below the current state of the art and would enable applications such as compact free-electron lasers.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.123.054801