Title :
Digital signal processing for the APS transverse and longitudinal damping system
Author :
Barr, D. ; Sellyey, W.
Author_Institution :
Adv. Photon Source, Argonne Nat. Lab., IL, USA
Abstract :
The Advanced Photon Source (APS) at Argonne National Laboratory will be a 7-GeV machine. It is anticipated that for beam operations beyond the baseline design of 100 mA stored beam current, a transverse and longitudinal damping system is needed to damp instabilities. A key part of this digital damping system is digital signal processing. This digital system will be used to process samples taken from the beam and determine appropriate correction values to be applied to the beam. The processing will take the form of a transversal digital filter with adaptable filter weights. Sampling will be done at 176 MHz with a possible correction bandwidth of 88 MHz. This paper concentrates on the digital processing involved in this system, and especially on the adaptive algorithms used for determining the digital filter weights
Keywords :
X-ray production; adaptive filters; digital filters; electron accelerators; high energy physics instrumentation computing; nuclear electronics; particle beam stability; signal processing; storage rings; 100 mA; 176 MHz; 7 GeV; 88 MHz; APS longitudinal damping system; APS transverse damping system; Advanced Photon Source; adaptable filter weights; adaptive algorithms; correction bandwidth; correction values; digital damping system; digital signal processing; instabilities damping; transversal digital filter; Damping; Digital filters; Digital signal processing; Digital systems; Frequency; Laboratories; Oscillators; Power harmonic filters; Synchrotrons; Transversal filters;
Conference_Titel :
Particle Accelerator Conference, 1995., Proceedings of the 1995
Conference_Location :
Dallas, TX
Print_ISBN :
0-7803-2934-1
DOI :
10.1109/PAC.1995.505761
