ACHIEVING SUB-MICRON STABILITY IN LIGHT SOURCES

M. Böge, PSI, Villigen, Switzerland

Abstract:

One of the major goals for present and future light sources is to achieve sub-micron orbit stability of the electron beam at the photon beam source points over a large frequency range. This puts tight constraints on the design of the various accelerator components including girders, magnets, power supplies and diagnostic hardware. Fast orbit feedback systems based on high performance RF- and X-BPMs become essential to suppress residual orbit distortions. Furthermore, the ``top-up'' operation mode which guarantees a constant electron beam current and thus a constant heat load in 3rd generation light sources is one of the key ingredients to reach sub-micron stability.