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A rotatable electron spectrometer for multicoincidence experiments

Författare:
  • Denis Céolin
  • J-O Forsell
  • B. Wannberg
  • Sébastien Legendre
  • Jérome Palaudoux
  • Gunnar Öhrwall
  • S. Svensson
  • M. N. Piancastelli
Publiceringsår: 2010
Språk: Engelska
Publikation/Tidskrift/Serie: Review of Scientific Instruments
Volym: 81
Nummer: 6
Dokumenttyp: Artikel
Förlag: American Institute of Physics

Sammanfattning

We have developed a rotatable hemispherical spectrometer with good energy and angular resolution, which can be positioned with the lens axis arbitrarily within a solid angle of 1 pi. The collection angle of the emitted electrons with respect to the polarization axis of the light is set by means of a three-axes goniometer, operating under vacuum. An important requirement for this setup was the possibility to perform coincidences between the electron analyzed by the spectrometer and one or several other particles, such as ions, electrons, or photons. The lens system and the hemispheres have been designed to accommodate such experimental demands, regarding parameters such as the resolving power, the acceptance angle, or the width of the kinetic energy window which can be recorded for a given pass energy. We have chosen to detect the impact position of the electron at the focal plane of the hemispherical analyzer with a delay line detector and a time-to-digital converter as acquisition card rather than using a conventional charge-coupled device camera. (C) 2010 American Institute of Physics. [doi: 10.1063/1.3449333]

Disputation

Nyckelord

  • Physics and Astronomy

Övriga

Published
Yes
  • ISSN: 0034-6748

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