Monte Carlo Calculations of Correction Coefficients for a Proton Calorimeter

The presence of vacuum gaps in calorimeters designed to measure doses of ionizing adiation leads to a change in particle flux, which in turn leads to a change in the value of the absorbed dose at the measuring point from the value that would be in a homogeneous medium. The results of Monte Carlo calculations of correction coefficients that take into account the distortion of the fluence of protons in a medical beam with a proton energy from 50 to 250 MeV for a proton calorimeter developed by VNIIFTRI are presented. The results obtained were used to determine the absorbed dose of proton radiation with a calorimeter included in the State Primary Standard GET 38-2024.