Author: Liu, L.
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MOPRO048 Update on Sirius, the New Brazilian Synchrotron Light Source 191
 
  • L. Liu, A.P.B. Lima, N. Milas, A.H.C. Mukai, X.R. Resende, A.R.D. Rodrigues, F.H. de Sá
    LNLS, Campinas, Brazil
 
  Sirius is a 3 GeV synchrotron light source that is being built by the Brazilian Synchrotron Light Laboratory (LNLS). The electron storage ring uses the multi-bend-achromat approach (5BA in this case) to achieve a very low beam emittance of 0.28 nm.rad. The 518 m circumference contains 20 straight sections of alternating 6 and 7 meters in length, to be used for insertion devices as well as injection and RF systems. The 5BA cell is modified to accommodate a thin high field dipole (for 1.4˚ deflection) in the center of the middle bend producing hard X-ray radiation (12 keV critical energy) with a modest contribution to the total energy loss. This high field dipole (2.0 T) will be made of permanent magnet material, whereas the low field (0.58 T) ones, responsible for the main beam deflection, will be electromagnetic. Many challenges are associated with this kind of lattice, including both in beam dynamics and in accelerator engineering, that require R&D on new techniques. In this paper we discuss the main issues and achievements for Sirius during the last year.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-MOPRO048  
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TUPRI041 Study of Collective Beam Instabilities for Sirius 1653
 
  • F.H. de Sá, H.O.C. Duarte, L. Liu, N. Milas, X.R. Resende
    LNLS, Campinas, Brazil
 
  In this paper we present the on going work of construction of the Sirius impedance budget and instability threshold estimates for several machine operation scenarios.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-TUPRI041  
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WEPRO009 A New Booster Synchrotron for the Sirius Project 1959
 
  • L. Liu, X.R. Resende, A.R.D. Rodrigues, F.H. de Sá
    LNLS, Campinas, Brazil
 
  The design for the Sirius full energy booster has been modified after the decision to change the storage ring lattice from TBA to 5BA in July 2012. In the new design the booster is concentric with the storage ring and shares the same tunnel. The achieved emittance of 3.7 nm.rad at 3 GeV for this large booster (496.8 m circumference) is better matched to the 5BA storage ring emittance of 0.28 nm.rad. Good nonlinear behaviour and efficient closed orbit correction in the presence of realistic errors are shown. Injection and extraction schemes and eddy current effects during ramping are also discussed.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-WEPRO009  
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THPME082 Sirius Diagnostic Beamlines 3427
 
  • N. Milas, L. Liu, A.R.D. Rodrigues
    LNLS, Campinas, Brazil
 
  Sirius is a 3 GeV synchrotron light source that is being built by the Brazilian Synchrotron Light Laboratory (LNLS). It will be part of a novel class of light sources with emittances in the sub-nm level. Both horizontal and vertical beam sizes at the dipoles will be of the order of or below 10μm, creating difficulties for measuring them using conventional techniques. This paper proposes a series of beamlines using different techniques that, combined, will be able not only to resolve beam sizes, but also measure energy spread and local transverse coupling in the storage ring.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPME082  
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