Author: Rodrigues, A.R.D.
Paper Title Page
TUPWO001 A New 5BA Low Emittance Lattice for Sirius 1874
 
  • L. Liu, N. Milas, A.H.C. Mukai, X.R. Resende, A.R.D. Rodrigues, F. H. de Sá
    LNLS, Campinas, Brazil
 
  Sir­ius is a third-gen­er­a­tion low emit­tance syn­chro­tron light source under con­struc­tion at LNLS, the Brazil­ian Syn­chro­tron Light Lab­o­ra­tory. A new 5BA lat­tice was de­signed in re­place­ment for the pre­vi­ous TBA lat­tice with the aim to re­duce the emit­tance to sub-nm.​rad val­ues. The new de­sign has a cir­cum­fer­ence of 518 m with 20 achro­matic straight sec­tions and a nat­ural emit­tance of 0.28 nm.​rad at 3 GeV for the bare lat­tice (with­out IDs). The dipoles com­bine low 0.58 T field mag­nets for the main beam de­flec­tion with a 2 T short su­per­bend mag­net sand­wiched in the cen­ter di­pole. This cre­ates a lon­gi­tu­di­nal di­pole gra­di­ent that is used both to lower the emit­tance and to pro­vide hard X-ray di­pole sources.