Bremsstrahlung of electrons from the "Elektronika U-003" accelerator on a tungsten target

The study investigates the generation of bremsstrahlung radiation from electrons in the "Elektronika U-003" accelerator using a tungsten target with a thickness of 1.7 mm and dimensions of 800 × 100 mm, positioned 100 mm from the exit window. It was experimentally established that at a distance of 500 mm from the converter, the uniform distribution of bremsstrahlung radiation corresponds to an area of 80 × 250 mm, with an absorbed dose ranging from 831 Gy to 668 Gy. At a distance of 250 mm, this area measures 90 × 160 mm, with doses ranging from 1.94 kGy to 2.28 kGy. To determine the contributions of bremsstrahlung radiation at various energies, lead "houses" were developed, allowing for the establishment that at energies of 3-5 MeV, the proportion of bremsstrahlung radiation in the interval 0.2 ≤ E_γ < 0.5 MeV is 48.8 %, while in the ranges 0.1 ≤ E_γ < 0.2 MeV it is 34.6 %, 0.5 ≤ E_γ < 1 MeV is 9.6 %, E_γ ≤ 0.1 MeV is 5.5 %, and above 1 MeV is 1.5 %. The results are consistent with calculations performed using the Monte Carlo method. Conditions for electron irradiation and the distance from the tungsten target to the irradiated object were identified, where bremsstrahlung radiation can be used for research objects with dose rates of 1.4 Gy/s and 3.8 Gy/s.