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| Title | XFEL Isochronous Chicanes: Feasibility Study | |
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| Abstract | FEL schemes such as High-Brightness SASE [1] and Mode-Locking [2] require electron beam delays inserted between undulator sections. These schemes have been shown in simulations to perform most effectively when the electron beam delays are very close to isochronous, i.e. the first order longitudinal dispersion is very small. To minimise the disruption to the FEL process in the inter-undulator gaps, these delays must also be as compact as possible. In this paper we study the maximum longitudinal space that a delay chicane could occupy in an XFEL operating at 6 GeV before the peak power drops below a defined threshold, and we present a limit for the maximum longitudinal dispersion of the delay chicanes. We then present the optical designs of two chicanes that satisfy the requirements of length and isochronicity and show how these designs could be realised practically using small-aperture high-field quadrupoles. | |
| Footnotes & References | [1] PRL 110, 134802 (2013). [2] PRL 100, 203901 (2008). |
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| Paper | download THP033.PDF [0.417 MB / 3 pages] | |
| Export | download ※ BibTeX ※ LaTeX ※ Text/Word ※ RIS ※ EndNote | |
| Conference | FEL2019 | |
| Series | Free Electron Laser Conference (39th) | |
| Location | Hamburg, Germany | |
| Date | 26-30 August 2019 | |
| Publisher | JACoW Publishing, Geneva, Switzerland | |
| Editorial Board | Volker R.W. Schaa (GSI, Darmstadt, Germany); Winfried Decking (DESY, Hamburg, Germany); Harald Sinn (EuXFEL, Schenefeld, Germany); Gianluca Geloni (EuXFEL, Schenefeld, Germany); Siegfried Schreiber (DESY, Hamburg, Germany); Michaela Marx (DESY, Hamburg, Germany) | |
| Online ISBN | 978-3-95450-210-3 | |
| Online ISSN | "" | |
| Received | 16 August 2019 | |
| Accepted | 09 September 2019 | |
| Issue Date | 05 November 2019 | |
| DOI | doi:10.18429/JACoW-FEL2019-THP033 | |
| Pages | 658-660 | |
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