FEL2022

Simulation Study of a Dielectric Beam Energy Dechirper for the Proposed NSRRC EUV FEL Facility

WEP08

24 Aug 2022, 16:00

1h 30m

Exhibition Hall (Trieste Convention Centre)

Contributed Poster Electron beam dynamics Wednesday posters

Speakers

Mr Chih-Kai Liu (Department of Physics, National Central University)Prof. Shih-Hung Chen (Department of Physics, National Central University)Dr Wai-Keung Lau (National Synchrotron Radiation Research Center)Dr Wei-Yuan Chiang (National Synchrotron Radiation Research Center)Mr Shan You Teng (Department of Physics, National Central University)

Description

In this report, we present a simulation study of dielectric beam energy dechirper designed for the proposed NSRRC EUV FEL facility. As revealed from ELEGANT simulation of the high brightness driver linac system, a residual energy chirp of about 42 keV/m is left after bunch compression. It can be corrected by a capacitive dechirper structure when the bunch is slightly over-compressed. We successfully used a 1-m long corrugated pipe to remove the residual energy chirp in such simulation. However, in order to save space and for a simplified mechanical design, we consider also the usage of two orthogonally oriented planar dielectric-lined waveguide (DLW) structures to remove residual energy chirp after bunch compression. Wake fields due to this DLW dechirper has been calculated by CST code and the deduced wake function will be used in particle tracking using ELEGANT.

Proceedings

Paper

WEP08.pdf