Application of the combined channeling method at higher ion energies on cyclotron

F. Ditrói, J. D. Meyer, R. W. Michelmann, K. Bethge

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The method of ion channeling combined with other analytical methods is widely used for investigation of highly ordered materials by using the low energy linear accelerators. The energy of the bombarding particles (p, d and He ions) extends to several MeV/nucleon. The use of a cyclotron with the channeling method makes possible to apply higher bombarding energies (20 MeV maximal energy for protons in our case). The scattering chamber to be used for the channeling measurements is situated after an analyzing magnet and a pair of slits. The beam path is calculated electron-optically so, that practically no collimating is necessary after the last slit of the analyzing magnet (approx. 5 m from the target position) to produce a spot of 1 mm2 on the sample surface. This can lower the scattering-background and enhance the beam-quality for channeling purposes. The detectors are placed on a ring around the center of the chamber, and their distance from the target is also variable. The detectors can be moved on the ring by remote-controlled stepping motors. For positioning and rotating the samples a FISONS two-axis goniometer was used. For testing and calibrating the irradiation and measuring equipment simple Si crystals were used. Their surfaces were cut and polished perpendicular to main crystallographic directions (<110>, <100>).

Original languageEnglish
Pages (from-to)361-364
Number of pages4
JournalMaterials Science Forum
Volume248-249
DOIs
Publication statusPublished - 1997

Keywords

  • Channeling
  • Cyclotron
  • GaAs
  • High-Energy
  • Silicon

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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