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Poster ‐ 25: Neutron Spectral Measurements around a Scanning Proton Beam
Author(s) -
Kildea John,
Enger Shirin,
Maglieri Robert,
Mirzakhanian Lalageh,
Dahlgren Christina Vallhagen,
Dubeau Jacques,
Witharana Sanjeeva
Publication year - 2016
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 - 10.1118/1.4961799
Subject(s) - neutron , proton , beam (structure) , bragg peak , neutron spectroscopy , proton therapy , neutron temperature , spectrometer , spectral line , materials science , bonner sphere , physics , nuclear physics , neutron scattering , optics , neutron cross section , astronomy
We describe the measurements of neutron spectra that we undertook around a scanning proton beam at the Skandion proton therapy clinic in Uppsala, Sweden. Measurements were undertaken using an extended energy range Nested Neutron Spectrometer (NNS, Detec Inc., Gatineau, QC) operated in pulsed and current mode. Spectra were measured as a function of location in the treatment room and for various Bragg peak depths. Our preliminary unfolded data clearly show the direct, evaporation and thermal neutron peaks and we can show the effect on the neutron spectrum of a water phantom in the primary proton beam.