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SIVQ-LCM Protocol for the ArcturusXT Instrument
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The Sirius project.

Lin Liu1, Natalia Milas1, Afonso H C Mukai1

  • 1Brazilian Synchrotron Light Laboratory (LNLS), Campinas, SP, Brazil.

Journal of Synchrotron Radiation
|September 2, 2014
PubMed
Summary
This summary is machine-generated.

Sirius, a new low-emittance synchrotron light source, features a novel five-bend achromat lattice design. This design optimizes beam dynamics, achieving a low emittance of 0.28 nm rad for enhanced performance.

Keywords:
diffraction-limited storage ringmulti-bend achromatsuperbend

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Area of Science:

  • Accelerator Physics
  • Synchrotron Radiation Technology

Background:

  • Sirius is a next-generation synchrotron light source under construction at the Brazilian Synchrotron Light Laboratory (LNLS).
  • The project aims to achieve ultra-low emittance for advanced research applications.

Purpose of the Study:

  • To present the lattice design and beam dynamics optimization for the Sirius electron storage ring.
  • To detail the innovative magnet configuration for enhanced dipole performance and reduced emittance.

Main Methods:

  • Utilized a five-bend achromat (5BA) lattice design for the 3 GeV electron storage ring.
  • Implemented a hybrid dipole magnet system combining low-field magnets with a central permanent-magnet superbend.
  • Optimized dynamic aperture for off-axis injection and energy acceptance for extended beam lifetime.

Main Results:

  • Achieved a bare lattice emittance of 0.28 nm rad.
  • The hybrid dipole design produces 12 keV critical photon energy, reduces total dipole energy loss, and decreases emittance by approximately 10% via a longitudinal field gradient.
  • Optimized parameters enable top-up operation and a beam lifetime of approximately 11 hours with a third-harmonic cavity.

Conclusions:

  • The presented lattice design and beam dynamics optimization are crucial for Sirius's performance as a low-emittance synchrotron light source.
  • The innovative dipole magnet strategy effectively enhances photon source properties and beam dynamics.
  • The design facilitates stable operation, including top-up mode and long beam lifetimes, supporting advanced scientific investigations.