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- W1540331502 abstract "A low emittance upgrade is planned for SPEAR3. As the first phase, the emittance is reduced from 10nm to 7nm without additional magnets. A further upgrade with even lower emittance will require a damping wiggler. There is a smaller dynamic aperture for the lower emittance optics due to a stronger nonlinearity. Elegant based Multi-Objective Genetic Algorithm (MOGA) is used to maximize the dynamic aperture. Both the dynamic aperture and beam lifetime are optimized simultaneously. Various configurations of the sextupole magnets have been studied in order to find the best configuration. The betatron tune also can be optimized to minimize resonance effects. The optimized dynamic aperture increases more than 15% from the nominal case and the lifetime increases from 14 hours to 17 hours. It is important that the increase of the dynamic aperture is mainly in the beam injection direction. Therefore the injection efficiency will benefit from this improvement." @default.
- W1540331502 created "2016-06-24" @default.
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- W1540331502 date "2012-05-30" @default.
- W1540331502 modified "2023-09-27" @default.
- W1540331502 title "OPTIMIZATION OF THE DYNAMIC APERTURE FOR SPEAR3 LOW-EMITTANCE UPGRADE †" @default.
- W1540331502 hasPublicationYear "2012" @default.
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