Lifetime Modelling at APS and ESRF
نویسنده
چکیده
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 signficant 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 discusssed.
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تاریخ انتشار 1999