CERN Accelerating science

Article
Title	Collimation System for the BESSY FEL
Author(s)	Kamps, Thorsten
Affiliation	(BESSY GmbH, Berlin)
Publication	2004
In:	26th International Free Electron Laser Conference and 11th FEL User Workshop 2004, Trieste, Italy, 29 Aug - 3 Sep 2004, pp.e-proc. TUPOS02
Subject category	Accelerators and Storage Rings
Abstract	Beam collimation is an essential element for the successful running of a linear accelerator based free electron laser. The task of the collimation system is to protect the undulator modules against mis-steered beam and dark-current. This is achieved by a set of apertures limiting the succeeding transverse phase space volume and a magnetic dogleg structure for longitudinal phase space filtering. In the following the design of the BESSY FEL collimation section is described together with detailed simulation studies.