Storage Ring Optics Measurement, Model, and Correction

Journal Article · Wed Apr 04 04:00:00 EDT 2007 · ICFA Beam Dyn.Newslett.

OSTI ID:901837

Yan, Yiton T

To improve the optics of a storage ring, it is very helpful if one has an accurate lattice model. Although the ideal lattice may serve such a purpose to some extent, in most cases, real accelerator optics improvement requires accurate measurement of optics parameters. In this section, we present precision measurements of a complete set of linear orbits from which we can form a linear optics model to match the linear optics of the real machine. We call such a model a virtual machine. We have used a model-independent analysis (MIA) for accurate orbit and phase advance measurement and then used an SVD-enhanced Least Square fitting for building accurate virtual models for PEP-II e+, e- storage rings. The MIA virtual machine matches very well the real-machine linear optics including dispersion. It has successfully improved PEP-II beta beats, linear couplings, half-integer working tunes, and dispersion.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 901837
• Report Number(s): SLAC-PUB-12438
• Journal Information: ICFA Beam Dyn.Newslett., Journal Name: ICFA Beam Dyn.Newslett.
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ACCURACY
Accelerators
ACCPHY
OPTICS
STORAGE RINGS