Electron Beam Dynamics in 4GLS

TL;DR

This paper analyzes the electron beam dynamics in the 4GLS facility, focusing on the design, synchronization, and effects impacting beam quality for multiple FEL applications.

Contribution

It provides a comprehensive overview of the 4GLS electron beam design, including injector, transport, and energy recovery, with ongoing studies on beam stability issues.

Findings

Shared 540 MeV linac for multiple FELs

Synchronization of IR-FEL with other beams

Ongoing studies on coherent synchrotron radiation and wakefields

Abstract

Studies of the electron beam dynamics for the 4GLS design are presented. 4GLS will provide three different electron bunch trains to a variety of user synchrotron sources. The 1 kHz XUV-FEL and 100 mA High Average Current branches share a common 540 MeV linac, whilst the 13 MHz IR-FEL must be well-synchronised to them. An overview of the injector designs, electron transport, and energy recovery is given, including ongoing studies of coherent synchrotron radiation, beam break-up and wakefields. This work is being pursued for the forthcoming Technical Design Report due in 2008.