1. Current Status of the SPring-8 Upgrade Project.
- Author
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Tanaka, Hitoshi
- Subjects
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LATTICE dynamics , *ELECTROMAGNETIC waves , *MAGNETIC dipoles , *SYNCHROTRON radiation , *X-ray reflection , *PARTICLES (Nuclear physics) , *SPECTRUM analysis - Abstract
For many years, scientists around the world have sought an ultra-low-emittance ring-based light source that offers greater performance than existing third-generation light sources. Pioneering work on the seven-bend lattice for MAX IV [1] initiated these efforts. Another significant development was the scheme for nonlinearity control based on “phase-matched” sextupole pairs. This configuration, first introduced in a light source design by the ESRF design group [2], efficiently suppresses strong nonlinear resonances induced by sextupoles for chromaticity correction. Since a small dynamic aperture due to the strong nonlinearities mentioned earlier presents a great obstacle when we attempt to lower the beam emittance of a high-energy light source using individual bending magnets with small deflection angles, the ESRF scheme contributes significantly to the emittance reduction that can be practically achieved. [ABSTRACT FROM PUBLISHER]
- Published
- 2014
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