Author: Resende, X.R.
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THPMR011 Injection Dynamics for Sirius Using a Nonlinear Kicker 3406
  • L. Liu, X.R. Resende, A.R.D. Rodrigues, F.H. de Sá
    LNLS, Campinas, Brazil
  The concept of injection using a single nonlinear kicker has been proposed and tested in several existing storage rings with reduction in the stored beam oscillations during the accumulation process. Despite the good results, this scheme has not yet been adopted for routine operation in these machines due to the reduced injection efficiency. The main cause for reduction in efficiency is precisely the nonlinearity of the kick at the injected beam position and the generally large injected beam size. In this paper we study the injection dynamics in the Sirius storage ring where beam accumulation is based only on the use of a nonlinear kicker. The whole injection system has been optimized from the start for high injection efficiency.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR011  
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THPMR012 Optimization of Nonlinear Dynamics for Sirius 3409
  • F.H. de Sá, L. Liu, X.R. Resende
    LNLS, Campinas, Brazil
  In this work we describe the optimization of the non-linear dynamics for the Sirius storage ring. The strong sextupoles of the lattice, necessary to correct the linear chromaticities, generate higher order terms in the tune-shifts with amplitude and energy, which may result in a large tune footprint for the machine. The configuration the sextupole families found that wraps this tune footprint and thus avoids dangerous resonances was achieved with minimization of Hamiltonian driving terms and tracking-based multi-objective algorithms include realistic values of misalignment and excitation errors of the magnets, orbit correction, insertion devices fields and real vacuum chamber apertures.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR012  
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THPMR013 A New Optics for Sirius 3413
  • L. Liu, X.R. Resende, F.H. de Sá
    LNLS, Campinas, Brazil
  We report on the latest optics modifications for the 3 GeV Sirius electron storage ring presently under construction at the Brazilian Synchrotron Light Laboratory, LNLS. Although the basic parameters are set and frozen, improvements in the magnetic lattice and beam optics are still being implemented. In particular, the central dipole in the 5BA cell has been replaced by an all-permanent-magnet dipole with a thin superbend in the center with peak magnetic field of 3.2 T and the operation mode has now symmetry 5, with 15 low βx straight sections and 5 high βx sections. The 3 GeV ring bare lattice emittance is now 0.25 nm.rad.  
DOI • reference for this paper ※ DOI:10.18429/JACoW-IPAC2016-THPMR013  
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