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@inproceedings{vogt:ipac2021-tupab102,
author = {M. Vogt and J. Zemella},
title = {{A New 2nd Bunch Compression Chicane for the FLASH²⁰²⁰⁺ Project}},
booktitle = {Proc. IPAC'21},
pages = {1618--1621},
eid = {TUPAB102},
language = {english},
keywords = {quadrupole, dipole, vacuum, focusing, FEL},
venue = {Campinas, SP, Brazil},
series = {International Particle Accelerator Conference},
number = {12},
publisher = {JACoW Publishing, Geneva, Switzerland},
month = {08},
year = {2021},
issn = {2673-5490},
isbn = {978-3-95450-214-1},
doi = {10.18429/JACoW-IPAC2021-TUPAB102},
url = {https://jacow.org/ipac2021/papers/tupab102.pdf},
note = {https://doi.org/10.18429/JACoW-IPAC2021-TUPAB102},
abstract = {{The first stage of the FLASH²⁰²⁰⁺ project is an upgrade of the FLASH injector beamline. Within this framework, the 2nd bunch compression chicane (BCC) will be completely redesigned. The old S-chicane will be replaced with a new C-chicane which is 3.5m shorter thereby generating space a new section for re-matching the beam from the injector into the linac. The new BCC will be equipped with quad/skew-quad units in both legs of the chicane to compensate correlations of the transverse degrees of freedom with the longitudinal ones. Since quadrupoles tend to have a circular bore, the chicane is designed with movable round vacuum chambers and movable dipoles for maintaining full flexibility in choosing the compression parameters. This article describes the technical details and introduces a thin-lens model of BCCs which allows analytical estimates on the effects of powering the quad/skew-quad units on optics parameters as well as estimates on the required strengths of these magnets in order to remove correlations of the magnitudes typically observed at FLASH.}},
}