title: Neutron H*(10) inside a proton therapy facility: comparison between Monte Carlo simulations and WENDI-2 measurements.
abstract: Inside an IBA proton therapy centre, secondary neutrons are produced due to nuclear interactions of the proton beam with matter mainly inside the cyclotron, the beam line, the treatment nozzle and the patient. Accurate measurements of the neutron ambient dose equivalent H*(10) in such a facility require the use of a detector that has a good sensitivity for neutrons ranging from thermal energies up to 230 MeV, such as for instance the WENDI-2 detector. WENDI-2 measurements have been performed at the Westdeutsches Protonentherapiezentrum Essen, at several positions around the cyclotron room and around a gantry treatment room operated in two different beam delivery modes: Pencil Beam Scanning and Double Scattering. These measurements are compared with Monte Carlo simulation results for the neutron H*(10) obtained with MCNPX 2.5.0 and GEANT4 9.6.
authors.affiliation: Institut de Recherche de l'Institut Supérieur Industriel de Bruxelles, Département Nucléaire, Rue Royale 150, 1000 Bruxelles, Belgium Université Libre de Bruxelles, Interuniversity Institute for High Energies, Boulevard du Triomphe 2, 1050 Bruxelles, Belgium desmet@isib.be.
authors.forename: V
authors.initials: V
authors.lastname: De Smet
authors.affiliation: Ion Beam Applications S.A. (IBA), Chemin du Cyclotron 3, 1348 Louvain-la-Neuve, Belgium.
authors.forename: F
authors.initials: F
authors.lastname: Stichelbaut
authors.affiliation: Université Libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84), Av. F.D. Roosevelt 50, 1050 Bruxelles, Belgium.
authors.forename: T
authors.initials: T
authors.lastname: Vanaudenhove
authors.affiliation: Ion Beam Applications S.A. (IBA), Chemin du Cyclotron 3, 1348 Louvain-la-Neuve, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: Mathot
authors.affiliation: Université Libre de Bruxelles, Interuniversity Institute for High Energies, Boulevard du Triomphe 2, 1050 Bruxelles, Belgium.
authors.forename: G
authors.initials: G
authors.lastname: De Lentdecker
authors.affiliation: Université Libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84), Av. F.D. Roosevelt 50, 1050 Bruxelles, Belgium.
authors.forename: A
authors.initials: A
authors.lastname: Dubus
authors.affiliation: Université Libre de Bruxelles, Service de Métrologie Nucléaire (CP 165/84), Av. F.D. Roosevelt 50, 1050 Bruxelles, Belgium.
authors.forename: N
authors.initials: N
authors.lastname: Pauly
authors.affiliation: Institut de Recherche de l'Institut Supérieur Industriel de Bruxelles, Département Nucléaire, Rue Royale 150, 1000 Bruxelles, Belgium.
authors.forename: I
authors.initials: I
authors.lastname: Gerardy
mesh_terms: D000465:Algorithms; D002138:Calibration; D003198:Computer Simulation; D017357:Cyclotrons; D005160:Facility Design and Construction; D005858:Germany; D006801:Humans; D009010:Monte Carlo Method; D009502:Neutrons; D061766:Proton Therapy / Q000379:methods*; D011522:Protons; D011829:Radiation Dosage; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods*; D011879:Radiotherapy Dosage; D015203:Reproducibility of Results; D012542:Scattering, Radiation
chemical_list: D011522:Protons