Novel bunch compressor chicane: The five-bend chicane

Four dipole magnetic chicanes are typically used in high-performance accelerators to compress electron bunches to their final peak currents but subject the beam to emittance dilution due to the coherent synchrotron radiation (CSR) effect. In this paper, we present a new magnetic bunch compressor geo...

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Bibliographic Details
Published inPhysical review. Accelerators and beams Vol. 25; no. 9; p. 090701
Main Authors Khan, Donish Z., Raubenheimer, Tor O.
Format Journal Article
LanguageEnglish
Published College Park American Physical Society 01.09.2022
Subjects
Algorithms
Chicanes
Dilution
Dipoles
Emittance
Free electron lasers
Synchrotron radiation
Synchrotrons
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ISSN2469-9888
2469-9888
DOI10.1103/PhysRevAccelBeams.25.090701

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Summary:Four dipole magnetic chicanes are typically used in high-performance accelerators to compress electron bunches to their final peak currents but subject the beam to emittance dilution due to the coherent synchrotron radiation (CSR) effect. In this paper, we present a new magnetic bunch compressor geometry designed to locally suppress the CSR-induced emittance degradation called the five-bend chicane. We will include a simulation study comparing a five-bend chicane to the nominal four-bend chicane of the LCLS-II-HE’s second bunch compressor (BC2) beamline. The study will consist of emittance and energy spread growth due to CSR using a one-dimensional, elegant, and two-dimensional, csrtrack, CSR algorithm in free space, and the free-electron laser performance using genesis.
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ISSN:2469-9888
2469-9888
DOI:10.1103/PhysRevAccelBeams.25.090701