Development of a setup for calibration of ionization chambers and feedback sensors of the extracted carbon ion beam with activation detectors

This paper presents a radiometric experimental setup operating on the γ-γ-coincidence principle for calibration of ionization chambers and feedback sensors of the extracted carbon ion beam with activation detectors. In this case, an activation detector made of pure carbon with a natural isotope mixture and the 12C(12C,X)11C reaction are used. The setup ensures the measurement of sample activity with an error of about 3%. A block diagram of the setup and its description are provided, as well as a description of the process of measuring its registration efficiency using a control reference source 22Na. The registration efficiency of the radiometric setup was measured and is estimated at 60.1%. The working prototype of this radiometric setup has already been used for several sessions of operation of the U-70 accelerator complex when working with carbon ions with an energy of 400-450 MeV/nucleon to calibrate the plane-parallel ionization chamber developed and manufactured by IHEP. A manual for the operation of the setup and a technique for performing measurements are being prepared.