Precision Measurement and Improvement of e+, e- Storage Rings

Conference · Tue Jun 27 04:00:00 EDT 2006

OSTI ID:885276

Yan, Y T; Cai, Y; Colocho, W; Decker, F-J; Seeman, J; Sullivan, M; Turner, J; Wienands, U; Woodley, M; Yocky, G

Through horizontal and vertical excitations, we have been able to make a precision measurement of linear geometric optics parameters with a Model-Independent Analysis (MIA). We have also been able to build up a computer model that matches the real accelerator in linear geometric optics with an SVD-enhanced Least-square fitting process. Recently, with the addition of longitudinal excitation, we are able to build up a computer virtual machine that matches the real accelerators in linear optics including dispersion without additional fitting variables. With this optics-matched virtual machine, we are able to find solutions that make changes of selected normal and skew quadrupoles for machine optics improvement. It has made major contributions to improve PEP-II optics and luminosity. Examples from application to PEP-II machines will be presented.

• Research Organization: Stanford Linear Accelerator Center (SLAC)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC02-76SF00515
• OSTI ID: 885276
• Report Number(s): SLAC-PUB-11925
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ACCURACY
Accelerators
ACCPHY
COMPUTERS
EXCITATION
LUMINOSITY
OPTICS
QUADRUPOLES
STORAGE RINGS