Digital orbit feedback control for SPEAR

Author

Hettel, R. ; Corbett, J. ; Keeley, D. ; Linscott, I. ; Mostowfi, D. ; Sebek, J. ; Wermelskirchen, C.

Author_Institution

Synchrotron Radiat. Lab., Stanford Univ., CA, USA

Volume

4

fYear

1995

Firstpage

2717

Abstract

A digital orbit feedback system is being developed for SPEAR to improve electron beam stability at photon beam sourcepoints. The first phase implementation of this system operates at 1 minute intervals and stabilizes the horizontal and vertical orbit position to 50 μm RMS at beam position monitors. The vertical global system works in tandem with local 50 Hz analog photon beam steering systems to stabilize photon beam position and angle. We are now developing the second phase system which will execute a unified global/local, 30-50 Hz vertical orbit feedback algorithm digitally. In this paper, we discuss design and performance of orbit monitoring, signal processing, and orbit correction components for the digital feedback systems

Keywords

electron accelerators; particle beam diagnostics; particle beam stability; storage rings; 1 min; 30 to 50 Hz; 50 Hz; SPEAR; beam position monitors; digital orbit feedback control; electron beam stability; horizontal orbit position; local 50 Hz analog photon beam steering systems; orbit correction components; orbit monitoring; photon beam angle; photon beam sourcepoints; second phase system; signal processing; vertical global system; vertical orbit feedback algorithm; vertical orbit position; Bandwidth; Digital signal processing; Electron beams; Feedback control; Magnets; Signal processing algorithms; Stability; Steering systems; Storage rings; Temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Particle Accelerator Conference, 1995., Proceedings of the 1995

Print_ISBN

0-7803-2934-1

Type

conf

DOI

10.1109/PAC.1995.505670

Filename

505670