- ph ] 2 0 Ju n 20 01 SLAC – PUB – 8232 August 1999 Dynamic Aperture Studies for SPEAR 3 1

The SSRL is investigating an accelerator upgrade project to replace the present 130 nm·rad FODO lattice with an 18 nm·rad double bend achromat lattice: SPEAR 3. In this paper, we review the methods used to maximize the SPEAR 3 dynamic aperture including optimization of linear optics, betatron tune, chromaticity and coupling correction, and effects of machine errors and insertion devices. Presented at the 1999 IEEE Particle Accelerator Conference (PAC99) New York City, New York, March 29 – April 2, 1999 1Work supported by Department of Energy contract DE–AC03–76SF00515. DYNAMIC APERTURE STUDIES FOR SPEAR 3 J. Corbett, Y. Nosochkov , J. Safranek, SLAC, Stanford, CA 94309 A. Garren, UCLA, Los Angeles, CA 90095