Adaptive method of closed orbit correction

Author

Cheng, Yao ; Hsue, Chen-Shiung

Author_Institution

Synchrotron Radiat. Res. Center, Hsinchu, Taiwan

fYear

1991

fDate

6-9 May 1991

Firstpage

1704

Abstract

A new adaptive method of closed orbit correction with a self-modeling feature is developed for third-generation synchrotron light sources with many insertion devices. The quasi-Newtonian method is applied iteratively to minimize the closed orbit distortions and to approach optimal control. The information from iterative position measurements is used to update the response matrix adaptively. A roughly estimated matrix from optic functions can initialize the correction scheme. The convergence rate is at least superlinear. Hence, the adaptive method may increase the efficiency of fast closed orbit correction. The noise immunity of this method is also considered.<>

Keywords

electron accelerators; particle beam diagnostics; storage rings; adaptive method; closed orbit correction; closed orbit distortions; electron storage rings; iterative position measurements; noise immunity; quasi-Newtonian method; response matrix; self-modeling feature; third-generation synchrotron light sources; Convergence; Distortion measurement; Employee welfare; Extraterrestrial measurements; Nonlinear distortion; Nonlinear optics; Optical distortion; Optical noise; Optimal control; Orbital calculations;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1991. Accelerator Science and Technology., Conference Record of the 1991 IEEE

Conference_Location

San Francisco, CA, USA

Print_ISBN

0-7803-0135-8

Type

conf

DOI

10.1109/PAC.1991.164751

Filename

164751