Speaker
Description
Physical experiments to study collinear cluster tri-partition are planned on the cyclic electron accelerator MT-25. This is a new type of multibody decay that requires, due to the small cross-section of the reaction, work at the maximum intensity of the electron beam for research.
The purpose of this work is to study the radiation fields that occur at the maximum intensity of the electron beam outside the biological protection of the microtron at an energy of 25 MeV.
In the course of the work, measurements of the dose rate of neutron and bremsstrahlung radiation were carried out. Beyond the biological protection of electron accelerators, they are the main components of radiation hazard. For measurements, a mobile measuring stand was used, the main elements of which are neutron and gamma radiation dosimeters UDBN-01 and UDBG-01.
According to the results of measurements at elevated beam currents, significant excess of the dose rate of braking radiation was detected at some points of the existing protection. Protection calculations were performed to eliminate weaknesses using the FLUKA software package created for Monte Carlo simulation of physical processes. At the same time, one of the tasks was to conduct a comparative analysis of the measured and calculated data, since there is practically no work on experimental verification of the reliability of the results of the specified software package for electron accelerators in the energy range up to 25 MeV.
Based on the results of calculations, a new project of local protection around the braking target assembly is presented. The measurement results carried out with the installed new protection showed that outside the microtron room, the power of the equivalent dose of braking radiation coincides with the calculation results and does not exceed the maximum permissible value of 1.2mSv/hour (according to the rules of NRB-99/2009).
| The speaker is a student or young scientist | Yes |
|---|---|
| Section | 5. Design and development of charged particle accelerators and ionizing radiation sources |
