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 main conclusions of our theoretical studies on the conditions that optimize the efficiency of accelerator driven subcritical reactors, performed in the frame of ADSR project are presented. A new approach based on the possibility to use low energy ion beams instead of protons is proposed. It was 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, energy gain G higher than 15 is achieved and the use of light ion beams, especially ⁷Li with energy 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 meant to check the results of theoretical work about the perspectives of ADSR demonstrates 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 was designed. The target is dedicated to the comparative study of the energy efficiency of proton and ion beams on one side, and of the influence of the shape of the neutron spectrum on the breeding capability of ADSR on the other side. The target consists in a lead block with dimensions 80x80x150 cm, surrounded by a stainless steel blanket 10 cm thick as substitute for the lead-bismuth coolant. The target has a central hole with radius 10 cm and length 120 cm. Converters from various materials, with total length 110 cm are placed in the central hole, ensuring a beam window with length 10 cm, and holes with length 150 cm in horizontal and vertical directions, at different radii for the placement of the detectors. Expected results predicted by simulation for different beams and converter materials are presented.