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First multi-bend achromat lattice consideration.

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Author

  • Dieter Einfeld
  • Mark Plesko
  • Joachim Schaper

Summary, in English

By the beginning of 1990, three third-generation synchrotron light sources had been successfully commissioned in Grenoble, Berkeley and Trieste (ESRF, ALS and ELETTRA). Each of these new machines reached their target specifications without any significant problems. In parallel, already at that time discussions were underway regarding the next generation, the `diffraction-limited light source (DLSR)', which featured sub-nm rad electron beam emittance, photon beam brilliance exceeding 10(22) and the potential to emit coherent radiation. Also, at about that time, a first design for a 3 GeV DLSR was developed, based on a modified multiple-bend achromat (MBA) design leading to a lattice with normalized emittance of ℇx = 0.5 nm rad. The novel feature of the MBA lattice was the use of seven vertically focusing bend magnets with different bending angles throughout the achromat cell to keep the radiation integrals and resulting beam emittance low. The baseline design called for a 400 m ring circumference with 12 straight sections of 6 m length. The dynamic aperture behaviour of the DLSR lattice was estimated to produce > 5 h beam lifetime at 100 mA stored beam current.

Department/s

Publishing year

2014

Language

English

Pages

856-861

Publication/Series

Journal of Synchrotron Radiation

Volume

21

Issue

Pt 5

Document type

Journal article

Publisher

International Union of Crystallography

Topic

  • Accelerator Physics and Instrumentation

Status

Published

ISBN/ISSN/Other

  • ISSN: 1600-5775