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TY - CONF AU - Altmark, A. AU - Lesiv, N.A. AU - Mukhamedgaliev, K. ED - Kuzin, Maksim V. ED - Schaa, Volker RW TI - Selection of a System for Correcting the Energy Spread of Relativistic Electron Bunches for a Free Electron Laser J2 - Proc. of RuPAC2021, Alushta, Crimea, 27 September-01 October 2021 CY - Alushta, Crimea T2 - Russian Particle Accelerator Conference T3 - 27 LA - english AB - The object of this work is a device called dechirper, which is used to decrease energy spread in relativistic electron bunch for free electron laser application. This system is based on cylindrical dielectric waveguide with vacuum channel needed for electron bunch passing. The Vavilov-Cherenkov radiation excited in waveguide is used to profile electromagnetic field inside the bunch and as a consequence to achieve the required energy distribution. The work includes numerical modeling of the electron beam passage through a waveguide structure, the generation of wake radiation and the interaction of this radiation with an electron bunch. We made original code to carry out numerical modeling, where the method of macroparticles and the method of Green’s function are implemented. The dependences of the energy compression coefficient and the length at which the maximum energy compression coefficient is achieved on various parameters of the dielectric waveguide structure and the physical parameters of electron bunches were identified. Various recommendations were also made on the choice of a waveguide used as a dechirper. PB - JACoW Publishing CP - Geneva, Switzerland SP - 268 EP - 270 KW - GUI KW - electron KW - wakefield KW - radiation KW - ECR DA - 2021/10 PY - 2021 SN - 2673-5539 SN - 978-3-95450-240-0 DO - doi:10.18429/JACoW-RuPAC2021-TUPSB20 UR - https://jacow.org/rupac2021/papers/tupsb20.pdf ER -