Arclike variable bunch compressors
(2020) In Physical Review Accelerators and Beams 23(10).- Abstract
Electron bunch compressors formed of achromat arcs have a natural advantage over the more commonly used chicane compressors in that linearization 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... (More)
Electron bunch compressors formed of achromat arcs have a natural advantage over the more commonly used chicane compressors in that linearization 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 utilized 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 in addition to its existing functions.
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- author
- Williams, Peter H. ; Pérez-Segurana, Gustavo ; Bailey, Ian R. ; Thorin, Sara LU ; Kyle, Bill LU and Svensson, Jonas Björklund LU
- organization
- publishing date
- 2020
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Physical Review Accelerators and Beams
- volume
- 23
- issue
- 10
- article number
- 100701
- publisher
- American Physical Society
- external identifiers
-
- scopus:85093506104
- ISSN
- 2469-9888
- DOI
- 10.1103/PhysRevAccelBeams.23.100701
- language
- English
- LU publication?
- yes
- id
- 31452668-a24b-4225-80ab-5ed9d32f64e3
- date added to LUP
- 2020-11-06 10:13:29
- date last changed
- 2022-04-19 01:42:34
@article{31452668-a24b-4225-80ab-5ed9d32f64e3,
abstract = {{<p>Electron bunch compressors formed of achromat arcs have a natural advantage over the more commonly used chicane compressors in that linearization 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 utilized 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 in addition to its existing functions.</p>}},
author = {{Williams, Peter H. and Pérez-Segurana, Gustavo and Bailey, Ian R. and Thorin, Sara and Kyle, Bill and Svensson, Jonas Björklund}},
issn = {{2469-9888}},
language = {{eng}},
number = {{10}},
publisher = {{American Physical Society}},
series = {{Physical Review Accelerators and Beams}},
title = {{Arclike variable bunch compressors}},
url = {{http://dx.doi.org/10.1103/PhysRevAccelBeams.23.100701}},
doi = {{10.1103/PhysRevAccelBeams.23.100701}},
volume = {{23}},
year = {{2020}},
}