FAST INDICATORS OF LONG-TERM STABILITY

Citation
E. Todesco et al., FAST INDICATORS OF LONG-TERM STABILITY, Particle accelerators, 55(1-4), 1996, pp. 273-282
Citations number
18
Categorie Soggetti
Physics, Nuclear","Physics, Particles & Fields","Nuclear Sciences & Tecnology
Journal title
ISSN journal
00312460
Volume
55
Issue
1-4
Year of publication
1996
Pages
273 - 282
Database
ISI
SICI code
0031-2460(1996)55:1-4<273:FIOLS>2.0.ZU;2-N
Abstract
The problem of finding effective fast indicators of long-term stabilit y for single particle betatronic motion in hadron accelerators is cons idered. Two indicators are analysed: the maximal Lyapunov exponent and the variation of the instantaneous tune. An automatic procedure to se lect stable from unstable particles is proposed. The guess of the dyna mic aperture provided by these fast indicators is checked against long -term tracking for the 4D Henon map and for a simplified version of th e SPS lattice used for experiments. Both indicators prove to be very e ffective to determine long-term stability with a limited number of tur ns.