Title :
Optics characterization and correction at PEP-II
Author :
Safranek, J. ; Donald, M.H.
Author_Institution :
Linear Accel. Center, Stanford, CA, USA
Abstract :
The linear optics of both the high energy ring (HER) and low energy ring (LER) for SLAC´s PEP-II B-Factory were characterized with two algorithms: analysis of the measured closed orbit response matrix and analysis of betatron phase advance measurements. The results of the two analyses were in good agreement. When the HER was first run in a low β optics in autumn 1997, the measured β functions showed more than a factor of two discrepancy from the design. The source of the optics distortion was diagnosed and corrected using these methods
Keywords :
colliding beam accelerators; electron accelerators; electron optics; particle beam diagnostics; storage rings; PEP-II B-Factory; betatron phase advance measurements; correction; low beta optics; measured closed orbit response matrix; optics characterization; optics distortion; Algorithm design and analysis; Computer errors; Distortion measurement; Extraterrestrial measurements; Gain measurement; Optical design; Optical distortion; Phase measurement; Size measurement; Storage rings;
Conference_Titel :
Particle Accelerator Conference, 1999. Proceedings of the 1999
Conference_Location :
New York, NY
Print_ISBN :
0-7803-5573-3
DOI :
10.1109/PAC.1999.794188
