Title :
Lifetime modelling at APS and ESRF
Author_Institution :
ESRF, Grenoble, France
Abstract :
Achieving long lifetimes is a major concern for all third generation light sources, even for high energy rings like the APS (7 GeV) or the ESRF (6 GeV). Due to the small electron transverse dimensions and the trend towards small gap undulator vacuum vessels, Touschek scattering and gas scattering make significant contributions to the lifetime reduction. Taking action to improve the lifetime therefore requires a reliable lifetime model. The strategy used on both machines to decouple the different contributions to the lifetime is presented and the experimental results analysed. Practical limitations on the lifetime modelling are discussed
Keywords :
X-ray production; electron accelerators; electron beams; particle beam stability; storage rings; 6 GeV; 7 GeV; APS; ESRF; Touschek scattering; gas scattering; high energy rings; lifetime modelling; lifetime reduction; small electron transverse dimensions; small gap undulator vacuum vessels; third generation light sources; Apertures; Data analysis; Electrons; Light scattering; Light sources; Particle scattering; Resonance light scattering; Scattering parameters; Undulators; X-ray scattering;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.792680
