Title :
Tracking studies of insertion device effects on dynamic aperture in the APS storage ring
Author :
Chae, Yong-Chul ; Crosbie, E.A.
Author_Institution :
Argonne Nat. Lab., IL, USA
Abstract :
We studied the effects of an insertion device (ID) on the dynamic aperture in the 7-GeV Advanced Photon Source (APS) storage ring using the program RACETRACK. We found that the nonlinear effect of the ID is the dominant effect on the dynamic aperture reduction compared to the other multipole errors which exist in the otherwise ideal lattice. The previous study of dynamic aperture was based on the assumption that the effect of the fast oscillating terms in Smith´s Hamiltonian is small, and hence can be neglected in the simulation. The remarkable agreement between the previous study and the current results using RACETRACK, including all effects of the fast oscillating terms, justified those assumptions at least for the APS ring
Keywords :
beam handling equipment; electron accelerators; particle beam diagnostics; physics computing; storage rings; 7 GeV; APS storage ring; Advanced Photon Source; Hamiltonian; RACETRACK program; aperture reduction; dynamic aperture; fast oscillating terms; insertion device effects; multipole errors; nonlinear effect; tracking studies; Apertures; Contracts; Intrusion detection; Laboratories; Lattices; Light sources; Nonlinear equations; Storage rings; Undulators;
Conference_Titel :
Particle Accelerator Conference, 1993., Proceedings of the 1993
Conference_Location :
Washington, DC
Print_ISBN :
0-7803-1203-1
DOI :
10.1109/PAC.1993.308939
