EP-1770: New RGB algorithm for dose measurements with EBT3 films tested in 6 MV x-ray beams up to 90 Gy doses

The work investigates the dose-response of EBT3 films in 6MV x-ray beams up to high-dose levels, 90Gy, with a fit function able to provide more precise dose measurements in the whole range by weighing the three RGB (Red-Green-Blue) color channels together, comparing also results with two different scanners. A consistent dose response was observed, no deviation from the known response curves is shown, only some difference in the recorded pixel values was detected using different scanners. The absorbed dose of unknown films was found to be within 1-1.5% of the true absorbed dose, with a precision of about 2.5%

Development of gamma insensitive silicon carbide diagnostics to qualify intense thermal and epithermal neutron fields

The e_LiBANS project aims at creating accelerator based compact neutron facilities for diverse interdisciplinary applications. After the successful setting up and characterization of a thermal neutron source based on a medical electron LINAC, a similar assembly for epithermal neutrons has been developed. The project is based on an Elekta 18 MV LINAC coupled with a photoconverter-moderator system which deploys the ({\gamma},n) photonuclear reaction to convert a bremsstrahlung photon beam into a neutron field. This communication describes the development of novel diagnostics to qualify the thermal and epithermal neutron fields that have been produced. In particular, a proof of concept for the use of silicon carbide photodiodes as a thermal neutron rate detector is presented.Comment: 10 pages, 10 figures, accepted for publication to JINST on the 17th April 202

INTENSE THERMAL NEUTRON FIELDS FROM A MEDICAL-TYPE LINAC: THE E_LIBANS PROJECT

The e_LiBANS project aims at producing intense thermal neutron fields for diverse interdisciplinary irradiation purposes. It makes use of a reconditioned medical electron LINAC, recently installed at the Physics Department and INFN in Torino, coupled to a dedicated photo-converter, developed within this collaboration, that uses (\u3b3,n) reaction within high Z targets. Produced neutrons are then moderated to thermal energies and concentrated in an irradiation volume. To measure and to characterize in real time the intense field inside the cavity new thermal neutron detectors were designed with high radiation resistance, low noise and very high neutron-to-photon discrimination capability. This article offers an overview of the e_LiBANS project and describes the results of the benchmark experiment

The E LiBANS project: Thermal and epithermal neutron sources based on a medical Linac

The E_LIBANS project (INFN) aims at producing neutron facilities for interdisciplinary irradiation purposes among which pre-clinical research for BNCT. After the successful setting-up of the thermal neutron source based on a medical LINAC, a similar apparatus for epithermal neutrons has been developed. Both structures are based on an Elekta 18 MV coupled with a photoconverter-moderator system which deploys the (gamma,n) reaction to convert the X-rays into neutrons. This communication describes the two neutron sources and the results obtained in their characterization