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Joakim

Joakim Cederkäll

Professor

Joakim

Limitations of the pulse-shape technique for particle discrimination in planar Si detectors

Author

  • G Pausch
  • M Moszynski
  • W Bohne
  • Joakim Cederkäll
  • H Grawe
  • W Klamra
  • MO Lampert
  • P Rohr
  • R Schubart
  • W Seidel
  • D Wolski
Show all

Summary, in English

Limitations of the pulse-shape discrimination (PSD) technique - a promising method to identify the charged particles stopped in planar Si-detectors - have been investigated. The particle resolution turned out to be basically determined by resistivity fluctuations in the bulk silicon which cause the charge-collection time to depend on the point of impact. Detector maps showing these fluctuations have been measured and are discussed. Furthermore we present a simple method to test the performance of detectors with respect to PSD. Another limitation of the PSD technique is the finite energy threshold for particle identification. This threshold is caused by an unexpected decrease of the total charge-collection time for ions with a short range, in spite of the fact that the particle tracks are located in a region of very low electric field.

Publishing year

1997

Language

English

Pages

1040-1045

Publication/Series

IEEE Transactions on Nuclear Science

Volume

44

Issue

3

Document type

Journal article

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Subatomic Physics

Status

Published

ISBN/ISSN/Other

  • ISSN: 0018-9499