FLNP SEMINAR
02-07-2025 11:00 Conference hall (bldg. 42, 3rd floor)
"Compact neutron source DARIA in the Russian strategy of neutron research development"
S.V. Grigoriev1, T.V. Kulevoy2 (1Petersburg Nuclear Physics Institute, NRC "Kurchatov Institute", 2National Research Center "Kurchatov Institute)
The scientific and technological basis of the Russian compact neutron source DARIA (Dedicated for Academic Research and Industrial Applications) based on a linear proton accelerator have been developed. The DARIA source is designed to create beams of thermal and cold neutrons that provide the highest possible neutron fluxes for a powder diffractometer, a polarized neutron reflectometer and a small-angle neutron scattering facility. The parameters of the entire complex - the ion source, the proton accelerator, the beryllium target assembly and the experimental neutron facilities - are optimized in terms of the repetition rate and duration of neutron pulses, the range of transmitted pulses, instrumental resolution and geometric dimensions. There are three natural directions in the development of neutron sources based on the DARIA project. One is the multiplication of the DARIA source in terms of deep specialization of neutron facilities with the corresponding reconstruction of the target assembly, but maintaining the parameters of the proton accelerator with an energy of 13 MeV. Another is to increase the power of the DARIA source by increasing the proton energy to 70 MeV, by changing the target material to tantalum and expanding the number and specificity of neutron installations. The third is to develop a high-flux pulsed neutron source based on a high-current, high-energy (up to 1 GeV) proton accelerator. The third direction requires a global revision of technological solutions in the high-energy part of the proton accelerator and target assembly, while maintaining the general ideology in the design, construction and operation of neutron stations. The paper discusses options for developing new pulsed neutron sources.