Thin�walled parallel plate ionization chamber for use with photon and electron beam dosimetry

David J. Keys, James A. Purdy, Martin H. Israel, Donald E. Velkley

Research output: Contribution to journalLetter

Abstract

The design and construction of a thin�walled parallel plate ionization chamber is described. The chamber makes use of a sputtered collecting electrode. The characteristics of this chamber include low leakage (less than 10−13 A), no stem effect, and reproducibility within 1%. No polarization effects have been seen for electron beams over an energy range 7–25 MeV while for cobalt 60–25 MV photon beams, it is only 10%–15%.

Original languageEnglish
Pages (from-to)163-164
Number of pages2
JournalMedical physics
Volume7
Issue number2
DOIs
StatePublished - Mar 1980

Keywords

  • CALIBRATION
  • DESIGN
  • ELECTRODES
  • ELECTRON DOSIMETRY
  • GAMMA DOSIMETRY
  • IONIZATION CHAMBERS
  • SPUTTERING

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