Arclike variable bunch compressors



Williams, Peter H ORCID: 0000-0002-8987-4999, Perez-Segurana, Gustavo, Bailey, Ian R, Thorin, Sara, Kyle, Bill and Svensson, Jonas Bjorklund
(2020) Arclike variable bunch compressors. PHYSICAL REVIEW ACCELERATORS AND BEAMS, 23 (10). 100701-.

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Abstract

Electron bunch compressors formed of achromat arcs have a natural advantage over the more commonly used chicane compressors in that linearisation of the longitudinal phase space is of the correct sign to compensate for the curvature imprinted by rf acceleration. Here we extend the utility of arc compressors to enable variation of the longitudinal compaction within a fixed footprint. We also show that this variability can be achieved independently order-by-order in momentum deviation. The technique we employ consists of additional dipoles, leading to the advantageous property that variability can be achieved without incurring significant penalty in terms of chromatic degradation. We show this by comparison to an alternative system where additional quadrupoles are utilised to enable variation of momentum compaction. Each of these alternative approaches are being considered in the context of an upgrade of the MAX IV linac, Sweden, to enable a soft X-ray free-electron laser (FEL) in addition to its existing functions.

Item Type: Article
Additional Information: 9 pages
Uncontrolled Keywords: physics.acc-ph, physics.acc-ph
Divisions: Faculty of Science and Engineering > School of Physical Sciences
Depositing User: Symplectic Admin
Date Deposited: 11 May 2021 07:44
Last Modified: 18 Jan 2023 22:48
DOI: 10.1103/PhysRevAccelBeams.23.100701
Open Access URL: https://doi.org/10.1103/PhysRevAccelBeams.23.10070...
Related URLs:
URI: https://livrepository.liverpool.ac.uk/id/eprint/3122209