Измерение потока протонов на циклотроне U-120M

Abstract

The object of the study is the calibration coefficient defining the dependence between the proton flux and the corresponding current of the ionization chamber. During the experimental studies, the values of the ionization current were measured by ionization chamber TN30010 and put in correspondence with the flux of protons from U-120M cyclotron measured with the semiconductor pixel Timepix detector. The experimental results were compared with the Monte Carlo simulation performed in Geant4 toolkit, which has reproduced the experimental conditions. As a result of the investigation, the calibration coefficients connecting the registered protons flux and ionization current for the ionization chamber TN30010 were obtained. These coefficients are in correspondence with the results of Geant4 simulation. The implementation of these results means the direct use of the calibration coefficients in the studies of the radiation hardness of the semiconductor pixel detectors. The obtained results are of interest for the experimental nuclear physics, especially for the fine-tuning of the detectors system in the experiments on high-energy heavy-ions collisions. In future it is planned to perform the studies of the radiation hardness of semiconductor pixel detectors on U-120M cyclotron, which will be used in the modernized ALICE detector system in CERN