DNP Seminar

02-04-2026 11:00 Conference hall (bldg. 42, 3rd floor)

"The target LETASUR for ADSR project"

Paraipan^a,b*, A. Abduvaliev^c, A. Balabekyan^d, O. V. Belov^a, F. H. Ergashev^c, V. M. Javadova^a, S. V. Korneev^e, L. K. Kostov^a,f, J. H. Khushvaktov^a,

A. Kulikov^a, A. A. Solnyshkin^a, V. V. Sorokin^e, T. N. Tran^a,g, S. I. Tyutyunnikov^a

^a Joint Institute for Nuclear Research, 6 Joliot-Curie st., Dubna, Russia, 141980

^b Institute of Space Science, 409 Atomistilor st., Magurele, Ilfov, Romania, 077125

^cInstitute of Nuclear Physics, Tashkent, Uzbekistan

^dInternational Center of Advanced Studies Yerevan State University, Yerevan, Armenia,0025

^eJoint Institute for Energy and Nuclear Research- Sosny, Minsk, Belarus

^fInstitute for Nuclear Research and Nuclear Energy, Tsarigradsko Shose Blvd. 72, Sofia, Bulgaria, 1784

^gInstitute of Physics of the Vietnam Academy of Science and Technology (IP VAST), Hanoi, Vietnam

 

The key conclusions of our theoretical investigations on the conditions that optimize the efficiency of accelerator-driven subcritical reactors, implemented within the framework of ADSR project are presented. A new approach based on the possibility of using low-energy ion beams instead of protons is proposed. It has been shown that ADSR can represent not only a solution for the problem of nuclear waste, but also an efficient source of energy. With beam intensities above 10¹⁶ p/s, the energy gain G higher than 15 has been achieved and the use of light ion beams, especially ⁷Li, with an energy of 0.25-0.3 AGeV interacting in Be converter instead of 1-1.5 GeV protons, ensures G>20 and allows a significant reduction of the accelerator length. The analysis of possible experiments aimed at verifying the results of theoretical research about the perspectives of ADSR shows that the most reliable comparison of the energy efficiency of different beams is obtained by measuring the fission distribution inside an extended target. Based on these conclusions, an extended lead target LETASUR has been designed. The target is dedicated to the comparative research of the energy efficiency of proton and ion beams on the one hand and of the influence of the shape of the neutron spectrum on the ability of ADSR to multiply on the other hand. The target consists of a lead block with dimensions 80x80x150 cm, surrounded by a stainless-steel blanket 10 cm thick as a substitute for the lead-bismuth coolant. The target has a central hole with a radius of 10 cm and a length of 120 cm. Converters from various materials, with a total length of 110 cm are positioned in the central hole, ensuring a beam window with a length of 10 cm and holes with a length of 150 cm in horizontal and vertical directions, at different radii for the positioning of the detectors. The expected results predicted by simulation for different beams and converter materials are presented.