A fast model calibration procedure for storage rings

Author

Corbett, W.J. ; Lee, M.J. ; Ziemann, V.

Author_Institution

Linear Accel. Center, Stanford Univ., CA, USA

fYear

1993

fDate

17-20 May 1993

Firstpage

108

Abstract

The ever-increasing demand for better performance from circular accelerators requires improved methods to calibrate the optics model. We present a linear perturbation approach to the calibration problem in which the modeled BPM-to-corrector response matrix is expanded to first order in quadrupole strengths. The result is numerically fit to the measured response matrix yielding quadrupole strength errors, corrector strength errors, and BPM linearity factors. The large number of degrees of freedom in the fit allows a comprehensive error analysis, including the determination of BPM resolutions. In this way, a self-consistent first order optics model of SPEAR was generated which reproduces the measured tunes

Keywords

calibration; electron accelerators; electron optics; particle beam diagnostics; storage rings; BPM linearity factors; BPM-to-corrector response matrix; SPEAR; circular accelerators; corrector strength errors; degrees of freedom; fast model calibration procedure; linear perturbation approach; optics model; quadrupole strength errors; quadrupole strengths; storage rings; Acceleration; Antenna measurements; Calibration; Computer errors; Equations; Error correction; Extraterrestrial measurements; Linearity; Predictive models; Storage rings;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1993., Proceedings of the 1993

Conference_Location

Washington, DC

Print_ISBN

0-7803-1203-1

Type

conf

DOI

10.1109/PAC.1993.308999

Filename

308999