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Updated: Jul 15, 2026

Characterization of Recombination Effects in a Liquid Ionization Chamber Used for the Dosimetry of a Radiosurgical Accelerator
Published on: May 9, 2014
Some specific features of ionization chamber calibrations in linac x-ray beams at the LNE-LNHB
1CEA-Saclay, Laboratoire National Henri Becquerel, PtC 104, 91191 Gif-sur-Yvette Cedex, France. franck.delaunay@cea.fr
Abstract:
The purpose of this note is to give some details about the modus operandi employed today to calibrate ionization chambers in radiotherapy linac photon beams at the Laboratoire National Henri Becquerel (LNE-LNHB). Some specific features are described: first the equipment (including the external monitoring ionization chambers), second the calculations of the profile or radial non-uniformity correction factors (up to 0.5% effect for commonly used ionization chambers) and finally the calculations to get the calibration coefficients for customer beam qualities.
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