Title :
A fast global beam position feedback system for Super-ACO
Author :
Cassinari, L. ; Darpentigny, J. ; Maymon, J.-N. ; Nadji, A. ; Pédeau, D.
Author_Institution :
Lab. pour l´´Utilisation du Rayonnement Electromagn., Univ. de Paris-Sud, Orsay, France
Abstract :
A fast global feedback system has been installed on Super-ACO in order to improve beam stability. The feedback uses all the 16 BPMs of the machine and 8 correctors in each plane. Two different correction algorithms have been tested, a harmonic based method and a direct inversion of the response matrix using the SVD technique. The fast corrections are computed by 8 DSPs connected by a fast digital data link in order to achieve a correction bandwidth exceeding 100 Hz. Each DSP acquires the data for both planes of 2 BPMs and computes the output correction for 2 correctors. In this paper, we present the current status of the implementation of the system. We give the results on the efficiency of the orbit correction and the improvements on the photon beam stability
Keywords :
accelerator control systems; electron accelerators; feedback; particle beam stability; signal processing; storage rings; 100 Hz; SVD technique; Super-ACO; beam stability; correction algorithms; digital signal processing; global beam position feedback system; orbit correction; photon beam stability; response matrix; Bandwidth; Digital signal processing; Extraterrestrial measurements; Feedback; Frequency; Motion analysis; Signal processing; Stability; Storage rings; Testing;
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.1999.795484
