Title :
Broad-band model impedance for the Avanced Photon Source storage ring
Author :
Chae, Yong Chul ; Song, Su-Bin ; Emery, Louis
Author_Institution :
Adv. Photon Source, Argonne Nat. Lab., IL, USA
Abstract :
The vacuum chamber components of the Advanced Photon Source storage ring have been modified since the facility´s initial construction. A notable modification includes narrow-gap chambers for insertion devices. We used the Bane-Heifets (1992,1988) model to describe the broad-band longitudinal impedance of new and old vacuum components in the ring. We found that the model with a few expansion terms fitted the wake potential well. In this paper we present the impedances of individual components and the impedance of the ring
Keywords :
electron accelerators; electron beams; particle beam dynamics; particle beam stability; storage rings; vacuum apparatus; wakefield accelerators; wigglers; APS; Advanced Photon Source storage ring; Bane-Heifets model; broad-band model impedance; insertion devices; narrow-gap chambers; vacuum chamber components; wake potential well; Character generation; Contracts; Equations; Impedance; Inductors; Laboratories; Polynomials; Potential well; Resistors; Storage rings;
Conference_Titel :
Particle Accelerator Conference, 2001. PAC 2001. Proceedings of the 2001
Conference_Location :
Chicago, IL
Print_ISBN :
0-7803-7191-7
DOI :
10.1109/PAC.2001.987194
