A telescope proton recoil spectrometer for fast neutron beam-lines

A Shaped-Foil Recoil Spectrometer for Neutron Time-of-Flight Measurements

A new design is presented for a time-ofight neutron spectrometer that uses a shaped scattering foil to generate deuteron recoils. It is shown that the number of recoils can be substantially increased by utilizing a three-dimensional, deuterated scattering foil in the shape of an ellipsoid, which maintains the time-ofight dispersion present originally in the neutrons. The time-integrated neutron...

Clinical Policy Bulletin: Proton Beam and Neutron Beam Radiotherapy

Fast Neutron and Gamma induced Radiation Dose Monitoring during Nano-particle Production by Proton beam Irradiation

We report a fast neutron and gamma induced radiation dose and flux monitoring study during the nano-particle production at the proton beam irradiation facility. The monitoring results will be used for understanding of the activation of irradiated samples and the effect to the nano-particle production. A cylindrical shape of BC523A liquid scintillator was used for the fast neutron and gamma moni...

Reference Dosimetry for Fast Neutron and Proton Therapy

Fast neutrons and protons undergo fundamentally different interactions in tissue. The former interact with nuclei, while the latter, as in the case of photons, interact mainly with atomic electrons. Protons do, however, also undergo some nuclear interactions, the probability of which increases with energy. For both modalities the practical instruments for determining the reference absorbed dose...

Fast Pencil Beam Dose Calculation for Proton Therapy Using a Double-Gaussian Beam Model

The highly conformal dose distributions produced by scanned proton pencil beams (PBs) are more sensitive to motion and anatomical changes than those produced by conventional radiotherapy. The ability to calculate the dose in real-time as it is being delivered would enable, for example, online dose monitoring, and is therefore highly desirable. We have previously described an implementation of a...