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On-line control of the nonlinear dynamics for synchrotrons

DOI: 10.1103/PhysRevSTAB.18.074002 DOI Help

Authors: J. Bengtsson (Brookhaven National Laboratories) , I. P. S. Martin (Diamond Light Source) , J. H. Rowland (Diamond Light Source) , R. Bartolini (Diamond Light Source)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Physical Review Special Topics - Accelerators And Beams , VOL 18 (7)

State: Published (Approved)
Published: July 2015

Open Access Open Access

Abstract: We propose a simple approach to the on-line control of the nonlinear dynamics in storage rings, based on compensation of the nonlinear resonance driving terms using beam losses as the main indicator of the strength of a resonance. The correction scheme is built on the analysis of the resonance driving terms in first perturbative order and on the possibility of using independent power supplies in the sextupole magnets, which is nowadays present in many synchrotron light sources. Such freedom allows the definition of “smart sextupole knobs” attacking each resonance separately. The compensation scheme has been tested at the Diamond light source and proved to be effective in opening up the betatron tune space, resonance free, available to the electron beam and to improve the beam lifetime.

Subject Areas: Technique Development