Comparison of dose values predicted by FLUKA to measured values using Luxel + Ta type dosimeters

摘要

A 250 MeV electron linear accelerator was used to expose a beam stop to a high radiation field for several minutes. The beam stop was covered with a lattice pattern of Luxel + Ta type dosimeters which were then sent to Landauer for reading. The deep dose equivalent values reported from Landauer were then compared to dose values predicted by the FLUKA Monte Carlo software. The four radiation weighting coefficient sets available in FLUKA from ICRP 74, for ambient dose, anterior-posterior irradiation, rotational irradiation geometry, and the worst possible geometry for irradiation were calculated and compared to the measured values. The best agreement for total dose were found to be the worst possible geometry for irradiation and anterior-posterior irradiation coefficients, however for separate photon and neutron dose scaling factors were needed for every dose weighting coefficient set. Synopsis: FLUKA Monte Carlo simulations of a 250 MeV electron LINAC beam stop exposure are scored for ICRP74 dose equivalent coefficient sets and are compared to the Landauer Luxel + deep dose equivalent reports.