MOP2WB03
SOLEIL, Gif-sur-Yvette, France
THP1WB01
SOLEIL, Gif-sur-Yvette, France
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MOP2WB03 |
Baseline Lattice for the Upgrade of SOLEIL | |
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| Previous MBA studies converged to a lattice composed of 7BA-6BA with a natural emittance value of 200-250 pm·rad range. Due to the difficulties of non-linear optimization in targeting lower emittance values, a decision was made to symmetrize totally the ring with 20 identical cells having long free straight sections longer than 4 m. A 7BA solution elaborated by adopting the sextupole paring scheme with dispersion bumps originally developed at the ESRF-EBS, including reverse-bends, enabling an emittance of 72 pm·rad has been defined as the baseline lattice. The sufficient on-momentum dynamic aperture obtained allows to consider off-axis injection. The linear and nonlinear dynamic properties of the lattice along with the expected performance in terms of brilliance and transverse coherence are presented. In particular, the beta functions tuned down to 1 m in both transverse planes at the center of straight sections allow matching diffraction limited photons up to 3 keV. In addition, a 9BA solution reaching 32 pm·rad and a novel longitudinal on-axis injection scheme involving rapidly decaying RF kicks developed at SOLEIL shall also be presented. | ||
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Slides MOP2WB03 [4.432 MB] | |
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THP1WB01 |
Survey of Collective Effects in Next-Generation Light Source Rings | |
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| In this talk we shall attempt to make an overview the general trend in storage rings optimized for the next-generation light sources, in the context of having as a result an important impact on beam collective effects. Reduction of the beam chamber cross section to attain strong magnetic fields for the ultra-low emittance optics is particularly highlighted. A series of collective effects and beam instabilities that are likely to get enhanced shall be reviewed. Some of the recent related theoretical, numerical and experimental studies shall be introduced, along with methods that are considered to be effective in mitigating the former undesirable effects. | ||
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