DARIA Compact Neutron Source in Russian neutron research development
Seminars
Frank Laboratory of Neutron Physics
Joint Laboratory Seminar
Leader: Egor Lychagin
Date and Time: Friday, 7 February 2025, at 11:00 AM
Venue: FLNP Conference Hall (3rd floor), Frank Laboratory of Neutron Physics
Seminar topic: “The DARIA Compact Neutron Source in the Russian strategy of neutron research development”
Speaker: Sergey Grigoriev (Petersburg Nuclear Physics Institute, Kurchatov Institute National Research Centre)
The scientific and technological basis of the DARIA (Dedicated for Academic Research and Industrial Applications) Russian Compact Neutron Source 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 polarised 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 optimised 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 specialisation 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.