Abstract
Sirius is a 3 GeV synchrotron light source that is being built by the Brazilian Synchrotron Light Laboratory (LNLS). The electron storage ring is based on a modified 5BA cell to achieve a bare lattice emittance of 0.27 nm.rad in a 518 m circumference ring that contains 20 straight sections of alternating 6 and 7 meters in length. The 5BA cell accommodates a thin permanent magnet high field (2 T) dipole in the center of the middle bend producing hard X-ray radiation (ec=12 keV) with a modest contribution to the total energy loss. In this paper we discuss the main achievements and issues for Sirius accelerators. Developments in beamlines are not discussed here.
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