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The LNLS soft X-ray spectroscopy beamline.

H Tolentino1, V Compagnon-Cailhol, F C Vicentin

  • 1Laboratorío Nacional de Luz Síncrotron - LNLS/CNPq, Caixa Postal 6192, 13083-970 Campinas SP, Brazil.

Journal of Synchrotron Radiation
|July 21, 2004
PubMed
Summary

A new soft X-ray spectroscopy beamline at LNLS offers efficient photon energies from 800-4000 eV. This versatile setup supports advanced experiments like photoemission and reflectivity studies.

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Area of Science:

  • Materials Science
  • Atomic and Molecular Physics
  • Surface Science

Background:

  • Development of advanced synchrotron radiation facilities is crucial for cutting-edge research.
  • Soft X-ray spectroscopy enables detailed investigation of electronic and chemical properties of materials.

Purpose of the Study:

  • To describe the design and capabilities of a new soft X-ray spectroscopy beamline at the National Synchrotron Light Source (LNLS).
  • To highlight the beamline's suitability for various surface science and materials characterization experiments.

Main Methods:

  • Installation of a soft X-ray spectroscopy beamline utilizing a bending-magnet source.
  • Incorporation of a gold-coated toroidal mirror for focusing (17 mrad angle of incidence).
  • Employment of a UHV (ultra-high vacuum) double-crystal monochromator with selectable Si (111), InSb (111), and beryl (101;0) crystal pairs.

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Main Results:

  • The beamline efficiently covers photon energies ranging from 800 to 4000 eV.
  • The UHV workstation is equipped with essential components including ion and electron guns, an electron analyzer, LEED optics, a channeltron, and a photodiode array.
  • The optical design ensures good efficiency across the specified energy range.

Conclusions:

  • The described soft X-ray spectroscopy beamline is a valuable new instrument at LNLS.
  • Its comprehensive setup and energy range make it ideal for photoemission, photoabsorption, reflectivity, and dichroism experiments.
  • This facility will advance research in materials science and surface chemistry.