A novel ionization chamber for high doses at industrial gamma irradiation facilities

摘要

This work presents the design of an ionization chamber with cylindrical geometry for measuring high doses of gamma radiation at industrial irradiation facilities. A novel geometry for the collector electrode to optimize the ion collection is suggested. This chamber is used to provide an alternative mean for dosimetry studies in the gamma irradiation plant, because with the proposed measuring system, we can know the dose rate at all the points and the dose during all the irradiation process. A prototype was tested and calibrated with 137Cs and 60Co radioactive sources in the Ionizing Radiation Metrology Laboratory of ININ and finally tested in the gamma irradiation plant at ININ.