Title :
Design features of a planar hybrid/permanent magnet strong-focusing undulator for free electron laser (FEL) and synchrotron radiation (SR) applications
Author_Institution :
Synchrotron Radiat. Lab., Stanford Univ., CA, USA
Abstract :
Insertion devices for Angstrom-wavelength free electron laser (FEL) amplifiers driven by multi-GeV electron beams generally require distributed focusing substantially stronger than their own natural focusing fields. Over the last several years a wide variety of focusing schemes and configurations have been proposed for undulators of this class, ranging from conventional current-driven quadrupoles external to the undulator magnets to permanent magnet (PM) lattices inserted into the insertion device gap. In this paper we present design studies of a flexible high-field hybrid/PM undulator with strong superimposed planar PM focusing proposed for a 1.5 Angstrom Linac Coherent Light Source (LCLS) driven by an electron beam with a 1 mm-mr normalized emittance. Attainable field parameters, tuning modes, and potential applications of the proposed structure are discussed
Keywords :
accelerator magnets; electromagnets; electron accelerators; electron beam focusing; free electron lasers; linear accelerators; permanent magnets; wigglers; 1.5 angstrom; FEL; LCLS; Linac Coherent Light Source; current-driven quadrupoles; focusing schemes; free electron laser; insertion devices; multiGeV electron beams; planar hybrid/permanent magnet strong-focusing undulator; synchrotron radiation applications; tuning modes; Electron beams; Free electron lasers; Laboratories; Lattices; Linear accelerators; Magnetic materials; Permanent magnets; Strontium; Synchrotron radiation; Undulators;
Conference_Titel :
Particle Accelerator Conference, 1997. Proceedings of the 1997
Conference_Location :
Vancouver, BC
Print_ISBN :
0-7803-4376-X
DOI :
10.1109/PAC.1997.753265