Dynamic Aperture Studies for SPEAR 3

Details Dynamic Aperture Studies for SPEAR 3 Dynamic Aperture Studies for SPEAR 3

2001-06-20

arxiv.org/abs/physics/0106066v1

AIP Conf.Proc. 468 (1999) 25-47

Physics

Accelerator Physics

23 pages

Scientific paper

The Stanford Synchrotron Radiation Laboratory is investigating an accelerator upgrade project that would replace the present 130 nm rad FODO lattice with an 18 nm rad double bend achromat (DBA) lattice: SPEAR 3. The low emittance design yields a high brightness beam, but the stronger focusing in the DBA lattice increases chromaticity and beam sensitivity to machine errors. To ensure efficient injection and long Touschek lifetime, an optimization of the design lattice and dynamic aperture has been performed. In this paper, we review the methods used to maximize the SPEAR 3 dynamic aperture including necessary optics modifications, choice of tune and phase advance, optimization of sextupole and coupling correction, and modeling effects of machine errors, wigglers and lattice periodicity.

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