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Title: Touschek Lifetime Calculations for NSLS-II

The Touschek effect limits the lifetime for NSLS-II. The basic mechanism is Coulomb scattering resulting in a longitudinal momentum outside the momentum aperture. The momentum aperture results from a combination of the initial betatron oscillations after the scatter and the non-linear properties determining the resultant stability. We find that higher order multipole errors may reduce the momentum aperture, particularly for scattered particles with energy loss. The resultant drop in Touschek lifetime is minimized, however, due to less scattering in the dispersive regions. We describe these mechanisms, and present calculations for NSLS-II using a realistic lattice model including damping wigglers and engineering tolerances.
Authors:
;
Publication Date:
OSTI Identifier:
970507
Report Number(s):
BNL--90418-2009-CP
R&D Project: PO24; 39KC02000; TRN: US201002%%1248
DOE Contract Number:
DE-AC02-98CH10886
Resource Type:
Conference
Resource Relation:
Conference: PAC0905/04/2009; Vancouver, Canada; 20090504 through 20090508
Research Org:
Brookhaven National Laboratory
Sponsoring Org:
Doe - Office Of Science
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; APERTURES; BETATRON OSCILLATIONS; COULOMB SCATTERING; DAMPING; LIFETIME; LONGITUDINAL MOMENTUM; MULTIPOLES; SCATTERING; STABILITY Storage Ring; Touschek Lifetime; Non-Linear Dynamics; Momentum Aperture