Title :
Effect of nonplanar undulators on beam dynamics in ELETTRA
Author :
Tosi, Lidia ; Nagaoka, Ryutaro
Author_Institution :
Sincrotrone Trieste, Italy
Abstract :
The authors consider the installation of devices that will generate circularly polarized radiation in ELETTRA. However, the impact of such undulators on beam dynamics has been found to be more serious with respect to conventional planar devices, since further strong nonlinearities are introduced in both horizontal and vertical planes. An investigation of the consequences of these effects on beam dynamics has been carried out for different types of devices. After investigating the beam performance for various possibilities, an elliptical multipole wiggler has been found to be the most suitable. Furthermore, the lowering of the horizontal beta to suppress the nonlinearities in this plane has shown to be useful for the crossed undulator, even when the presence of sextupoles may hinder the effectiveness because of the optical symmetry break.<>
Keywords :
electron accelerators; storage rings; synchrotrons; wigglers; ELETTRA; beam dynamics; circularly polarized radiation; crossed undulator; elliptical multipole wiggler; horizontal beta; nonplanar undulators; optical symmetry break; planar devices; sextupoles; Apertures; Light scattering; Light sources; Linearity; Magnetic fields; Nonlinear optics; Optical polarization; Safety; Structural beams; Undulators;
Conference_Titel :
Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-7803-0135-8
DOI :
10.1109/PAC.1991.164540
