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Using ion chambers with wedge‐shaped absorbers for electron energy measurements
Author(s) -
Johnsen Stanley W.
Publication year - 1986
Publication title -
medical physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.473
H-Index - 180
eISSN - 2473-4209
pISSN - 0094-2405
DOI - 10.1118/1.595907
Subject(s) - wedge (geometry) , ionization chamber , electron , materials science , ionization , optics , ion , quality assurance , cathode ray , energy (signal processing) , linear particle accelerator , optoelectronics , atomic physics , physics , beam (structure) , nuclear physics , engineering , operations management , external quality assessment , quantum mechanics
A parallel‐plate ionization chamber placed behind a wedge‐shaped absorber and exposed to a radiotherapeutic electron beam exhibits an energy‐dependent response. Such a device designed to produce a linear energy dependence has been built and tested. The device yields results during exposure, and the difficulties of film handling, associated with similar procedures, have been eliminated. The precision of the device makes it suitable for use as a routine means of monitoring energy for quality assurance purposes.