SCIENCE BRINGS NATIONS TOGETHER JINR Association of Young Scientists and Specialists Conference "Alushta-2025"

8 Jun 2025, 09:00 → 15 Jun 2025, 20:00 Europe/Moscow

The Association of Young Scientists and Specialists (AYSS) of the Joint Institute for Nuclear Research (JINR) is holding the XIV Annual Scientific Conference of Young Scientists and Specialists "Alushta-2025" on 8 – 15 June, 2025.

This year, the conference is dedicated to the research and infrastructure facilities of the Institute, which have been launched after technical maintenance, and which are planned to be put into operation: IBR-2M Reactor, NICA Collider, LINAC-200, MSC-230, and to the preparation of work at DC-280. At the event, young JINR scientists and specialists will give presentations on their scientific research. In addition, it is planned to hold discussions on the topic of the lectures and a round table with the JINR Directorate, where young scientists and specialists will be able to ask their questions and make their suggestions regarding the development of the infrastructure, the organization of the scientific process, social policy, and many other issues related to the Institute.

Students, postgraduates, young scientists and specialists under 36 are invited to participate in the conference with presentations. Participants will be selected by the program committee based on the submitted applications.

The membership fee for JINR employees is 17,000 rubles. For external participants, it is 20,000 rubles.

The working languages of the conference are Russian and English (preferably). Presentation slides must be in English.

The list of participants will be available on the event's website. Applications must be submitted by 6 April 2025, at 23:59 (MSK).

If you have any questions, please contact: omusalushta@jinr.ru.

Information about transfer will be posted later.

Sunday 8 June

Arrival of the Participants at the Simferopol Station

Hotel Chek In

14:00 Lunch

Free Time

Registration

18:00 Dinner

Opening Ceremony

Event: Weclome party

Monday 9 June

08:30 Breakfast

Plenary Talk: FLNP

1 The IBR-2 pulsed research reactor for condensed matter investigations

Speaker: Sergey Kulikov (JINR)

Section Talks: FLNP

2 Power feedback model of the IBR-2M reactor and physical processes describing its behavior.

In 2024, as part of the work on creating a new neutron source, a three-dimensional model was developed to calculate temperature fields in the fuel assemblies (FAs) of the operational IBR-2 reactor, enabling the study of thermomechanical processes that directly influence reactor dynamics. Three key dynamic processes were studied in detail: axial fuel expansion and pellet geometry changes due to the spatial temperature distribution in the fuel, FA deformation caused by temperature gradients across the walls, expansion of the FA end-piece walls due to coolant temperature variations. The report will present the obtained results, which show agreement with experimental data.

Speaker: Maxim Podlesnyy (FLNP JINR)

3 Сравнение реакторов ИБР-2 и ИБР-2М. Возможные пути развития импульсных реакторов.

Реактор ИБР-2М, функционирующий с 2011 года в ЛНФ ОИЯИ, к 2040 году исчерпает свой ресурс. Уже сегодня необходимо иметь четкое представление о том, каким будет следующий шаг в развитии импульсных реакторов. Важным этапом является учет ретроспективы эксплуатации ИБР-2 и ИБР-2М, изучение различий в их динамике и других параметрах. Теоретическое описание процессов в активной зоне поможет сформулировать новые требования к конструкции нового реактора, которые позволят создать более надежную и эффективную установку.

Speaker: Яков Вдовин

4 Response of the LaBr3 scintillation detector on the 14.1 MeV neutrons irradiation

Gamma-detectors based on the LaBr3 crystals become more and more popular in nuclear research because of outstanding energy and timing resolutions. Their application in setups dedicated for neutron-induced reaction research requires information about processes which take place in LaBr3 crystals during neutron irradiation. In this report we present yields of gamma-rays emitted in neutron-induced reactions in LaBr3 which forms the "instant" component of the detector's response on neutron irradiation. Data was extracted by quite original way from measurements on the new configuration of the TANGRA setup which includes LaBr3 and HPGe detectors. In the data processing procedure one LaBr3 detector played a role of the irradiated sample. Obtained results and data processing details will be presented.

Speaker: Никита Федоров

5 Measurement of differential and total scattering cross sections of 14.1 MeV neutrons on carbon nuclei: methodological aspects and results

Differential cross sections of the elastic and inelastic scattering of 14.1 MeV neutrons on carbon nuclei measured in the frame of the TANGRA project will be presented in the talk. The experiment was carried out using the tagged neutron method which helped to reduce the background of random coincidences, determine the neutron flux on the target, and determine the energy of scattered neutrons by the time of flight. The total reaction cross-sections were calculated by approximating the measured differential cross-sections by expansions in Legendre polynomials and then integrating over the entire range of solid angles. The measured values of the differential cross sections are generally in agreement with the experimental data of other authors within the measurement uncertainties, but there is a large difference between the experimental results and evaluations from different libraries. In addition to the measurement results, the talk will cover the methodological aspects of the measurements carried out, including the characterization of the plastic detectors used in the measurements and the calculation of corrections taking into account the influence of various systematic factors.

Speaker: Pavel Prusachenko (Frank Laboratory of Neutron Physics, Joint Institute for Nuclear Research)

6 The fourth-generation reactor "Neptune" is a step towards closing the nuclear fuel cycle

Periodic pulsed reactors were suggested for the first time by Dmitry Blokhintsev in nineteen-fifty-five. The new idea solved the problem of low neutron flux after choppers in constant power reactors to create neutron pulses for the time-of-flight method. And the problem of low flux needed to spectroscopy in aperiodic pulsed reactors. The maximum power of these reactors can reach to a very high levels for a very short time combined with a very high neutron flux at the peak of pulse. Far away from the pulse, the reactivity has a constant negative value, and the reactor power in this period (between pulses) also has a constant value depending on the delayed neutron source. And as the moving part of the reactor approaches the rest of the reactor parts, the reactivity increases until it reaches a certain moment (-t0) and the pulsebegins. The reactivity continues to increase until the moving part begins to move away from the rest of the reactor parts, and the reactivity begins to decrease until the moving part moves away completely then the reactivity returns to zero at the moment (+t0). Between these two moments the number of fissions increases rabidly and the reactor power starts to increase and accumulate until the reactivity returns to the zero then power production stops and begins the cooling process.The half width of neutron pulse which called (ceta-half) is comparable with aperiodic pulsed reactors. And the average power which defined as (the total energy released during the pulse divided by the duration of the pulse) is comparable with constant research power reactors, the main advantage of these reactors is that the power can reach a very high level for a very short time while the constant power reactors can’t do the same. Np-237 is an artificial isotope with a half-life of 2 million years. It is formed in nuclear uranium fuel as a result of the beta decay of U-237, which is formed in fast reactors by the (n, 2n) reaction from U-238, or by double capture in U-235 in thermal reactors. Neptunium is considered one of the most significant spent-fuel wastes; one VVER reactor unit produces 13–14 kg of neptunium per year.The main features to choose the Np as a fissile material instead of uranium or Pu are shown in the slide. Recovering and reusing Np as a nuclear fuel helps solve the spent-fuel problem and close the nuclear fuel cycle. The main feature of Np is the very short prompt generation time (the generation time is the time from the birth of neutron to its absorption which leads to fission and production a secondary neutrons). The short generation time increases the total number of fissions in Np 7 times more than that in Pu at the same power, and enable having a short pulse of neutrons. Because of the Np is a threshold isotope, with a fission threshold of 0.4MeV, the effective delayed neutrons will be very low, and the background power will be at the minimum.The fission threshold property of Np allows using a moderating material to modulate the reactivity. The neutron radiative capture in Np will produce a good fissile material, there is no reactivity effect from the fuel burnup.

Speaker: Dr Ахмед Хассан (ОИЯИ - ЛНФ)

7 Small Size Alternative Fast Neutron Detector based on Helium-4 gas Using PHITS Monte Carlo Simulations

This paper presents a Monte Carlo simulation study aimed at designing a Alternative fast neutron detector based on Helium-4 gas as the detection material. This research focuses on changing the optimal design parameters for a Helium-4 detector when irradiated by a Californium (Cf-252) neutron source. A Monte Carlo simulation model was developed using the Particle and Heavy Ion Transport code System (PHITS) to track neutron interactions with Helium-4 gas within various detector configurations. Specifically, variations in the length, radius, and pressure of the Helium-4 gas inside the detector were implemented to evaluate their impact on detection efficiency.

Speaker: cao hai (van)

8 A study of the defect formation of CuO nanostructures under He+ ion irradiation

Copper (II) oxide (CuO) is a p-type semiconductor with a narrow bandgap of 1.21 to 1.55 eV, non-toxic, abundant in the Earth's crust and stable. These characteristics make the CuO a suitable material for applications in optoelectronic devices. The aim of this work is to study the possibility of extending the employment of this material in extraterrestrial or other environments under ions irradiation. In this study, we investigate the structural changes, the defects formation and evolution which takes place in the nanostructured CuO layer under light ions irradiation. The CuO samples were irradiated with doses from 3.13 ∙1013 to 3.38∙1016 particles/cm2. The obtained CuO nanostructures were studied by scanning electron microscopy (SEM), X-rays diffraction (XRD) and positron annihilation spectroscopy (PAS). The transfer of energy to the samples during irradiation can lead to radiation induced processes like lattice recovery and defects formation or reduction (i.e. vacancies creation and complexes creation and reduction). The characterization results indicate, mainly, the lattice recovery at short irradiation times and the competition of three radiation induced processes at longer irradiation times.

Speaker: Silvia María Fortuné Fábregas (FLNP-JINR)

11:40 Coffee-break

Section Talks: FLNP

9 Investigation of the effect of the microstructure of positive electrodes of chemical current sources on their functional characteristics

This work presents the results of research carried out with the aim of conducting systematic studies of qualitative and quantitative patterns between the microstructure of electrode coatings and their specific characteristics. Information about the microstructure of coatings was obtained using small-angle thermal neutron scattering, which, due to the high penetrating power of this radiation, makes it possible to study industrial systems within the framework of non-destructive testing. Fundamentally new scientific and technical solutions for the formation of effective electrodes are based on the use of nanostructured conductive additives based on graphene derivatives and modified carbon nanotubes, as well as on the use of polymer binders with different structures. The results were obtained at the low-angle neutron scattering facility at the research reactor IBR-2 FLNP JINR. The influence of nanostructured carbon additives on the functional characteristics of chemical current sources has been evaluated. The paper also presents the results of the development of a prototype lithium-ion battery with increased specific characteristics.

Speaker: Meir Yerdauletov (jinr)

10 Comprehensive studies of cultural heritage sites at the IBR-2 reactor

Various studies of archaeological samples have been carried out at the IBR-2 reactor for many years, using available methods and installations. Most of these experiments are conducted to determine the volume (neutron tomography) and structural (neutron diffraction) characteristics of samples. However, in connection with the modernization of the EPSILON installation on channel 7 (b) of the IBR-2 reactor, it became possible to measure the crystallographic texture, which is a set of orientations of polycrystal grains. The report will provide an overview of such studies at the DN-6, NPT, Epsilon facilities and the results.

Speaker: Veronika Smirnova (FLNP JINR)

11 The systematic structural studies of some Byzantine ceramic fragments using neutron diffraction, tomography and Raman spectroscopy.

The systematic studies of composition and spatial distribution of main phases inside volume of twenty-five fragments of Byzantine ceramic obtained in archeological works in the Dobrudja region, Romania, have been performed using neutron diffraction and tomography, and Raman spectroscopy. To determine the mineral phase composition of the studied ceramics, we used the neutron diffraction method using a DN-6 neutron diffractometer [1] of the IBR-2 pulsed reactor (JINR, Dubna, Russia). The features and spatial distribution of phases were studied by neutron radiography and tomography [2] at a specialized experimental station NRT on the 14th channel of the IBR-2 high-flux pulsed reactor. The obtained data on the mineral composition of the studied ceramic materials indicate the production of dishes, mainly from clay with a natural admixture of feldspars, quartz, calcite and mica. We assume that the presence of calcites, including aragonite, may be associated with shell particles present in the sand from the seashore. Therefore, we associate larger grains or formations within the volume with a source of sand on the coast. Based on the content of mineral phases of quartz and mica, three groups were distinguished: samples with a low calcite content - up to 15% and with a high calcite content - from 40 to 90%, and the 3rd group with a mica and quartz content of less than 30%. Comparison with neutron tomography data for these groups yielded very interesting data and assumptions. We assume that ceramic samples from group 2 have an imported nature of these ceramic products. In conclusion, we believe that not only the phase composition of ceramic fragments can indicate the source of raw materials, but also some structural features observed by neutron tomography can provide the necessary structural markers for assumptions about the pottery manufacture location or chemical processes occurring during annealing.

References:
1. D.P. Kozlenko, S.E. Kichanov, E.V. Lukin, B.N. Savenko, Crystals 8, 331 (2018).
2. Kozlenko, D.P., Kichanov, S.E., Lukin, E. v, Rutkauskas, A. v,
Bokuchava, G.D., Savenko, B.N., Pakhnevich, A. v, Rozanov, A.Yu.,
2015. Neutron Radiography Facility at IBR-2 High Flux Pulsed Reactor: First Results. Physics Procedia 69, 87–91.

Speaker: Ayazhan Zhomartova (Joint Institute for Nuclear Research)

Plenary Talk: BLTP

12 Phase transitions in Nature: from water to quark-gluon plasma

Speaker: Dr Nikita Lebedev (N.N. Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research)

Section Talks: BLTP

13 Axial anomaly and Unruh effect in curved spacetime

I will review the hydrodynamical approach to the description of the gravitational chiral anomaly in spacetimes with a non-trivial Ricci tensor proportional to the cosmological constant (so-called Einstein manifolds) and discuss an alternative derivation of the Unruh effect in curved spacetime as a non-trivial consequence of the hydrodynamical description of the axial current.

Speaker: ROMAN KHAKIMOV (MSU)

14 N= 2 supersymmetry and higher-spin theories

I will give a brief overview of the amazing theoretical phenomena that are observed in the N=2 supersymmetric higher spin theories. The talk is based on the results obtained in BLTP jointly with Professor E.A. Ivanov and Professor I.L. Buchbinder

Speaker: Nikita Zaigraev (JINR, MIPT)

15 Rotating Black Holes in Extended Theories of Gravity: Constraints Using EHT Data

Using an improved version of the Newman-Janis algorithm, we obtain metrics of rotating black holes for a set of extended gravity theories that extend general relativity in different ways: the Horndeski model, the bumblebee model, the Gauss-Bonnet scalar gravity, the loop quantum gravity, the conformal gravity, and $f(Q)$ (symmetric teleparallel gravity STEGR). The obtained metrics are used to model black hole shadows. It is shown that for some models the critical values of the angular momentum $a_{crit}$ emerge. The previous conclusion that the extended gravity theory corrects by itself the effects of rotation in both directions is confirmed. This appears to be important for further modelling of shadow profiles taking into account the constantly increasing accuracy of black hole images. Thus, when rotation is taken into account black hole shadow images, as the GW170817 test or the post-Newtonian formalism, can serve as a meaningful way to test and constrain extended theories of gravity.

Speaker: Oleg Zenin (Lomonosov Moscow State University, Faculty of Physics, Department of Quantum Theory and High Energy Physics)

14:00 Lunch

Plenary Talk: Offices and Departments

16 Department of International Cooperation

Speaker: Otilia-Ana Culiciv

Section Talks: Offices and Departments

17 Science art

Speaker: Варвара Фуфаева

18 Улучшаем навыки съемки видео на телефон. Наглядные примеры, практические рекомендации

Рассмотрим примеры удачных и неудачных кадров, снятых людьми-непрофессионалами в видеосъемке, поймём, что можно улучшить, и научимся не допускать подобные ошибки в своих видеосъемках.

Speaker: Mr Александр Байдацкий (Группа социальных коммуникаций УНЦ ОИЯИ)

Free Time

18:00 Dinner

Tuesday 10 June

08:30 Breakfast

Plenary Talk: VBLHEP

19 Ускорительный комплекс NICA - вселенная в лаборатории

Speaker: Mr Михаил Шандов (Joint Institute for Nuclear Research, Veksler and Baldin Laboratory of High Energy Physics)

Section Talks: VBLHEP

20 Spin transparency mode of deuterons in the entire energy range at the Nuclotron/JINR

To carry out experiments on the deuteron beam extracted from the Nuclotron (JINR, Dubna), both transverse and longitudinal polarization are required. At present, there is no experimentally tested solution for obtaining longitudinal polarization of deuterons for arbitrary beam energies. Any direction of deuteron polarization, including longitudinal, in the entire beam energy range can be obtained in the spin transparency mode by symmetric installation of solenoids in each of the eight superperiods of the Nuclotron. The field integral of one solenoid does not exceed 20 T⋅m. The deuteron polarization orientation is controlled by a spin navigator realized by small fields variations of the solenoids.

Speaker: Elizaveta Butenko (JINR, LHEP, Dubna 141980)

21 Development of a temperature controller for cryogenic systems at the NICA accelerator complex

Cryogenic systems are used to create and maintain extremely low temperatures across various fields, ranging from scientific experiments to industrial technologies. The use of cryogenic equipment is critical for the development of advanced materials and superconductors, as well as for the storage and transportation of biological materials. Cryogenic systems are also essential for the operation of the NICA accelerator complex. The cryogenic supply system of the NICA accelerator complex is a sophisticated closed technological system that includes compressor, cryogenic, capacitive, and vacuum equipment. The cryogenic temperature controller must ensure the operation of the hydrogen target of the BM@N physical setup, cooled using a cryocooler: it sets the working temperature of the target cryocondenser at levels up to 100 Kelvin with an accuracy of ±0.3 K for the condensation of the working substance into the target located in the charged particle beam zone. In the operational state, the target must be filled with liquid hydrogen, helium, or deuterium.

Speaker: Maxim Dzugaev (JINR LHEP)

22 Exploring Nuclear Clusters Through Relativistic Nucleus Fragmentation

The discovery of atomic Bose-Einstein condensation (BEC) has prompted investigations into its potential manifestation in nuclear systems. The concept of α-conjugate nuclei, such as ¹²C, ¹⁶O, and ²⁰Ne, as ensembles of α particles has been proposed, though it represents a simplified model. Extensive studies have demonstrated that α clustering plays a fundamental role in the structure of light nuclei. In this context, the BECQUEREL experiment aims to address critical questions in nuclear physics by examining the dissociation of relativistic light nuclei with high precision in nuclear track emulsion (NTE), providing detailed insights into nuclear cluster dynamics [1]. The decays of ⁸Be and the Hoyle state are considered signatures of αBEC states. Relativistic fragmentation studies reveal these states through narrow angle correlations of helium and hydrogen fragments, with accompanying neutron emission [2]. By analyzing fragmentation events of ⁸⁴Kr and other nuclei, this investigation probes correlations between α-clustering, nuclear fragmentation, and unstable states such as ⁸Be as a candidate for 4αBEC. The study also involves investigating neutron multiplicities and the decay processes of carbon nuclei under relativistic muon interactions, providing insights into nuclear dissociation mechanisms.

References
1. P. I. Zarubin, Lect. Notes Phys. 875, 51-93 (2014), doi:10.1007/978-3-319-01077-9_3 [arXiv:1309.4881].
2. A. A. Zaitsev, N. Marimuthu et al Phys. Atom. Nuclei 86, 1101–1106
(2023). doi:10.1134/S1063778824010617 [arXiv:2307.16465].

Speaker: Dr MARIMUTHU NATARAJAN (Joint Institute for Nuclear Research)

23 Methods of electron cooling friction force measurement suitable for NICA Booster synchrotron

Electron cooling is a method of reducing momentum spread of ion beams in synchrotrons. The mechanism of electron cooling is based on temperature exchange between circulating ions and a cold electron beam coming from an electron gun and then accelerated to the same velocity as ions. For small ion density the equilibrium temperature of the ion beam is set by effective temperature of electrons. With an increase of ion density their equilibrium temperature may be limited by intrabeam scattering in the ion beam. In the range of very small velocities the plasma perturbation frequency is not working and experimental measurements are required to understand the electron cooling in the region of small velocities. The precision of cooling force measurement depends on a chosen method and accuracy of available beam instrumentation. In this paper, the measurement methods for electron cooling force are reviewed, and the potential of their usage at Booster synchrotron of NICA accelerator complex are discussed.

Speaker: Даниил Чумаков (ОИЯИ / НИ ТПУ)

24 The facility for manufacturing of HTS cables and solenoids

There are two tasks require the use of pulse mode HTS (high-temperature superconducting) magnets at the NICA accelerator complex. The first is a 3 MJ inductive energy storage device SMES in the Booster and Nuclotron power supply system, the solenoid has a diameter and height of just under a meter and it will be manufactured in the 25th. And there is the task at the R&D stage is the development of magnets for the modernization of the Nuclotron. For pulse magnets, it is necessary to make windings from cables with currents of several kA. For this task, a cable machine has been developed and manufactured at JINR with the possibility of manufacturing HTS cables in various configurations and with different characteristics, as well as winding solenoids from this cable. The report will talk about this machine and some of the technical solutions that make it possible to create high-quality superconducting cables.

Speaker: Evgeny Matyukhanov (JINR LHEP)

11:40 Coffee-break

Section Talks: VBLHEP

25 Nuclear modification factor of inclusive charged particles in Au+Au collisions at URQMD and HYDRO model

The Quantum ChromoDynamics (QCD) phase diagram, often represented using coordinates of temperature (T) and baryonic chemical potential ($\mu_B$), includes a transition from a hadronic gas phase to a quark-gluon plasma (QGP) phase. The Beam Energy Scan (BES) program at Relativistic Heavy Ion Collider (RHIC) varies the gold-gold collision energy aiming to explore the phase diagram and pinpoint the critical point. As part of the Beam Energy Scan I (BES-I) program conducted from 2010 to 2014, the STAR experiment presented results on the nuclear modification factor for the Au+Au system at energies $\sqrt{s_{NN}}$ = 7.7-27 GeV/c. In 2018, the STAR experiment initiated the second phase of the BES-II program, which is expected to have a tenfold increase in statistics compared to the first phase. This will enable a deeper understanding of the nuclear modification factor and improve its description. In this talk, we present new measurements of charged particle production and the nuclear modification factor $R_{CP}$ based on model data from the URQMD and HYDRO models. We compare these new results with the findings from BES-I to evaluate how well the theoretical models describe the behavior of the nuclear modification factor. Additionally, we analyze how the nuclear modification factor behaves in the region of higher transverse momenta, which allows for a deeper investigation of potential jet suppression effects and is significant for understanding the formation and properties of the quark-gluon plasma (QGP) at lower energies.

Speaker: Alisher Aitbayev (JINR)

26 Distributed control system for the BM@N experiment

Big modern physics experiments represent a collaboration of workgroups and require wide variety of different electronic equipment. Besides trigger electronics or Data acquisition system (DAQ), there is a hardware that is not time-critical, and can be run at a low priority. Slow Control system are used for setup and monitoring such hardware. Slow Control systems in a typical experiment are often used to setup and/or monitor components such as high voltage modules, temperature sensors, pressure gauges, leak detectors, RF generators, PID controllers etc. often from a large number of hardware vendors. Slow control system provides solution of the following tasks: control and monitoring of control parameters of detectors and other subsystems in the process of operation and setup of experimental facility, timely detection of failures in facility operation and alarming of emergency situations, monitoring of environmental parameters, archiving of facility parameters in database for further use in analysis of experimental data for the purpose of their correction

Speaker: Илья Осокин (JINR)

27 Optimization of the detector configuration for the new SRC experiment with a polarized deuteron beam

At the Laboratory of High Energy Physics (LHEP) within JINR, we’re preparing a new SRC (Short-Range Correlations) experiment at the HyperNIS experimental area in the fixed target experimental hall Bld. 205. By investigating the fleeting interactions between high-momentum nucleons, SRC studies can provide unique insights into the structure of nuclear matter. This experiment will leverage a tensor-polarized deuteron beam to perform spin-dependent measurements of SRC. To achieve this, a novel setup based on a two-arm spectrometer is under development. Here, we present preliminary results on optimizing the detector configuration for this experiment.

Speaker: Asya Atovellaeva

28 The CSC data in the 2022 SRC run

The 2022 SRC run aims on measurement of the scattering of 3.7 GeV/c/u 12C ions from hydrogen in inverse quasi-free kinematics. The ground-state distribution of single nucleons in the p-shell of 12C is studied by detecting two protons at large angles in coincidence with an intact 11B nucleus. The nuclear fragments produced in the collision and emitted at small angles (≤ 1 deg) , with respect to the incident beam, are tracked along the beam line and separated by a 2.87 Tm dipole magnet. A cathode strip chamber (CSC) and two drift chambers (DCH) are used to measure the protons and light fragments trajectories after the magnet. The report focuses on the first results of the analysis of the CSC data from the 2022 run.

Speaker: Madalina Mihaela Miloi (Joint Institute for Nuclear Research)

29 Hardware and software complex for measuring the tension of anod wires in drift tubes.

This paper presents a software-hardware complex for measuring the tension of the anode wire in drift tubes used in the SPD experiment's straw tracker at the NICA collider. The tension of the anode wire is critical for ensuring the accuracy of coordinate determination, as it affects electrical stability and the positioning of the wire due to electrostatic and gravitational forces. The developed complex employs an electromagnetic measurement method, allowing for high-precision control of the tension in thin-walled Mylar tubes. The device measures tension by analyzing wire vibrations. The central component of the system is the STM32L4 microcontroller, which manages the delivery of electrical pulses and performs measurements. The advantages of the complex include ease of setup, a user-friendly interface, and high measurement speed, making it suitable for mass production. Testing confirmed the device's high accuracy and efficiency. Thus, the developed complex represents a significant advancement in the technology for assembling high-precision wire detectors.

Speaker: Mr Nurzada Saktaganov (JINR. MLIT. University Dubna.)

30 Monitoring of data collection at the CMS experiment at the LHC

The report is a short review of process of pp-collision data at the LHC. Most of it is devoted to monitoring aspects as well as the contribution of JINR collaborators to it.

Speaker: Vladislav Shalaev (JINR, Dubna State University)

31 Подсистема удаленного доступа и синхронизации карт электроники для детектора TPC/MPD проекта NICA

Представлена реализация устройства на основе интерфейса JTAG и микросхем размножения синхросигналов. Устройство предназначено для реконфигурирования, отладки, тестирования и синхронизации 62 карт накамерной электроники и одного контроллера системы сбора данных детектора TPC/MPD проекта NICA. Отражен текущий статус устройства.

Speaker: Denis Potapov

32 Газовые мишени 3He для поляриметра низких энергий LEP ЛФВЭ

Низкоэнергетический поляриметр (LEP) является первым из трех поляриметров поляризованных пучков на ускорительном комплексе NUCLOTRON. Этот поляриметр расположен за линейным ускорителем Lu-20. Его рабочая энергия составляет 5 МэВ на нуклон. Газовая мишень 3He этой установки позволяет измерять как векторную поляризацию протонов (с реакцией упругого рассеяния 3He(p,p)3He), так и векторную и тензорную поляризацию дейтронов (с реакцией упругого рассеяния 3He(d,d)3He и ядерной реакцией 3He(d,p)4He).

Speaker: Дмитрий Климанский (НИКО, ЛФВЭ, ОИЯИ)

33 Технический паспорт магнита

Speaker: Ксения Ильина

34 Students сontribution to the development of NICA Injector Installations (Вклад студентов в развитие установок инжектора комплекса NICA)

The report will present an overview of the work done by students under the author's supervision. During the author's work at LHEP, more than 10 students completed their diploma theses devoted to solving problems on the NICA complex. The features of working with students and the contribution of their work to the NICA complex will be shown. Доклад представит обзор работ, выполненных студентами под руководстом автора. За время работы автора в ЛФВЭ более 10 студентов выполнили дипломные работы посвященные решению задач на комплексе NICA. Будут показаны особенности работы со студентами и вклад их дел в комплекс NICA.

Speaker: Дмитрий Понкин (JINR)

35 Системы контроля параметров и защиты модельного соленоида импульсного ВТСП индуктивного накопителя энергии SMES в системе питания сверхпроводящих магнитов Бустера и Нуклотрона NICA

NICA SMES – индуктивный накопитель энергии, изготавливаемый в ЛФВЭ ОИЯИ для уменьшения: пульсаций в рабочем токе сверхпроводящих магнитов Бустера и Нуклотрона NICA, влияния индуктивной нагрузки сверхпроводящих синхротронов на городскую электрическую сеть, потребления электроэнергии. Основным элементом SMES является многослойный соленоид из высокотемпературного сверхпроводящего (ВТСП) кабеля. Перед созданием полномасштабного SMES, для выбора материалов, отработки конструкции и технологии изготовления, необходимо создание модельного соленоида меньшего размера. Система обнаружения нормальной зоны (НЗ) в ВТСП кабеле создана на базе оборудования National Instruments. Она состоит из двух независимых подсистем, которые отвечают за детектирование срыва сверхпроводимости: использование схемы измерительного моста и измерение напряжения со всей обмотки с компенсацией индуктивной составляющей. Система термометрии базируется на модулях, предназначенных для измерения напряжения терморезистивных криогенных датчиков. Для оценки деформации каркаса и бандажа соленоида, разрабатывается система тензометрии.

Speaker: Ilya Donguzov (Igorevich)

36 Si-MWPC tracking and momentum reconstruction for SRC-2022 experiment

BM@N is the first operating fix-target experiment at the NICA collider facility at JINR. BM@N is using ion beams from the Nuclotron accelerator ring to study the properties of cold dense baryonic matter. In 2017 the physics program of BM@N was enriched by studies of Short-Range Correlations (SRC) in carbon nuclei. SRC are specific nucleon configurations, where nucleons are separated by a distance comparable with the nucleon radius and having high and opposite momenta exceeding the Fermi level for the given nucleus. The first SRC measurement took place in 2018, and the first results were published in 2021. In 2022 the second measurement of SRC in inverse kinematics at the BM@N setup was carried out. It aims at measuring absolute cross-sections, improving resolutions, and increasing the statistics. This contribution presents the Si-MWPC tracking and momentum reconstruction procedure for the SRC-2022 experiment.

Speaker: Timur Atovullaev (Kazakhstan)

14:00 Lunch

Plenary Talk: Г.В. Трубников

Round Table

Event: BBQ

Wednesday 11 June

08:30 Breakfast

Plenary Talk: MLIT

37 МИВК ОИЯИ

Speaker: Dr Nikolay Voytishin (JINR)

Section Talks: MLIT

38 Automation of BM@N Run9 data processing on a DIRAC distributed infrastructure

In spring 2025, the 9th data-taking run is scheduled for the BM@N experiment. Since February 2023, when data from the 8th run were acquired, the BM@N data processing has been carried out using a geographically distributed heterogeneous infrastructure based on the DIRAC Interware software. For the 9th run, an automated task-launching methodology has been developed. The processing is triggered by the appearance of RAW-type files associated with the 9th run in the DIRAC file catalog. A dedicated service periodically checks the catalog for new files requiring processing and initiates the corresponding tasks. Since BM@N data processing occurs in two stages (first, RAW → DIGI format conversion, followed by DIGI → DST conversion), two task triggers must be defined: one for the arrival of RAW files and another for DIGI files. Automating the processing pipeline enables rapid feedback on the experimental data quality, allowing for timely Data Quality monitoring and issue resolution.

Speaker: Igor Pelevanyuk (Joint Institute for Nuclear Research)

39 Pilot Applications for Distributed Task Execution in the SPD Online Filter System

Pilot applications play a crucial role in distributed computing, enabling dynamic resource management and workload execution. These applications are widely used in high-performance computing and large-scale experiments, providing a flexible mechanism for managing computational tasks. However, the lack of a unified abstraction and best practices has led to the emergence of numerous implementations with varying degrees of portability and efficiency. This talk will explore different architectures of pilot applications, their key components, and operational principles. Special attention will be given to the late-binding mechanism, which allows for dynamic task distribution and improved resource utilization efficiency. Our solution is a two-component system consisting of a pilot and a daemon. It employs a multithreaded approach that accounts for the specifics of the SPD experiment, ensuring task execution, monitoring, and status reporting. The presentation will provide insights into the use of pilot applications in distributed systems and their specific application in the SPD experiment.

Speaker: Леонид Романычев

40 An Overview of SPD Online Filter High-Throughput Processing Middleware

The SPD Online Filter is a critical intermediate system that bridges the continuous data stream from the DAQ with offline processing stages at geographically distributed computing centers. Its primary purpose is to reduce the vast amounts of raw data — by at least a factor of 20 — to enable full processing, long-term storage, and subsequent analysis. Because the data arrives without a hardware trigger, a multi-step software-based filtering approach is required to effectively filter the detector data in real time. Building on this multi-step framework, the SPD Online Filter architecture unites robust hardware with sophisticated middleware to manage complex data workflows. The DAQ aggregates detector signals into uniform time blocks, storing them in files for further processing. The middleware then coordinates a chain of processing steps: the Data & Storage Management System oversees the entire data lifecycle—handling registration, cataloging, consistency checks, cleanup, and storage; the Workflow Management System orchestrates the processing chain by defining tasks on a predefined graph of operations; and the Workload Management System, working in tandem with a Pilot Agent, creates and supervises jobs on compute nodes, ensuring seamless execution and secondary data generation. This report details the coordinated interactions among these components, demonstrating how they collectively enable robust, scalable, and real-time data processing to meet the requirements of the SPD experiment.

Speaker: Nikita Greben

41 SPD data management

Active preparations to launch the SPD experiment at the NICA collider are underway, but research in the field of spin physics has already begun. Researchers are currently working with large amounts of data obtained during the simulation and reconstruction of the studied physical processes. To ensure the reliable storage, distribution and accessibility of this data, a dedicated infrastructure has been deployed. This report describes the current status of the SPD data management: how they are processed, stored and distributed among different data centers. It discusses current processing, the volume of data produced, and storage strategies used. The tools and solutions employed for the data management will also be examined. Through this report, listeners will gain insight into the progress of work on data management for the SPD experiment, as well as any challenges encountered in its processing and long-term storage.

Speaker: Alexey Konak (JINR)

42 Цифровая карта технологий: детекторы, ускорители, компетенции

В Институте накоплен значительный опыт разработки детекторных и ускорительных систем, соответствующего оборудования и сотрудничества с промышленными и научными партнёрами. Однако отсутствие централизованной базы знаний затрудняло поиск информации о существующих технологиях, компетенциях и поставщиках, что приводило к ограниченному обмену опытом между подразделениями. Для решения этой задачи разработан веб-сервис, обеспечивающий учет и контекстный поиск данных как об оборудовании, материалах и технологиях Института, так и о накопленных компетенциях; визуализацию данных для внутренних сотрудников ОИЯИ; интеграцию информации из разных научных групп и отделов. Проект реализован силами молодых учёных, IT-специалистов и представителей научных групп. Дальнейшее развитие сервиса направлено на совершенствование как модулей динамического обновления и визуализации данных, так и модулей расширенного поиска по накопленной графовой базе данных.

Speaker: Ms Анна Ильина (MLIT JINR)

43 Convolutional neural networks for neutron tomography

Neutron tomography is a powerful tool in the field of materials science, geology, and archaeology. Due to the special properties of the interaction of neutrons with matter, neutron tomography complements the results of X-ray tomography. However, neutron tomography has a number of significant drawbacks: the long duration of the experiment, low spatial resolution, and inefficient data processing tools. New mathematical algorithms are needed to solve these problems. One of these is a convolutional neural network. This algorithm is adapted to work with images, which corresponds to the tasks of neutron tomography. This work presents the results of using convolutional neural networks to solve the challenges of neutron tomography.

Speaker: Булат Бакиров (FLNP JINR)

11:40 Coffee-break

Plenary Talk: LRB

44 Comparison of different accelerator-based neutron sources for Boron Neutron Capture Synovectomy.

Speaker: Иван Падрон (LNF)

Section Talks: LRB

45 Dynamics of IL-1β, arginase, and NO synthase levels in mouse brain homogenates following proton irradiation at the Bragg peak in the short and long term.

The investigation of biological mechanisms underlying the effects of radiation on the human body remains highly relevant due to its profound medical and social importance. According to existing literature, the repair of radiation-induced tissue damage involves an acute phase marked by elevated oxidative stress. This response results from the activation of resident macrophages, which express high levels of inducible nitric oxide synthase (iNOS) and the pro-inflammatory cytokine interleukin-1 (IL-1). Following this initial phase, a recovery phase occurs, characterized by increased infiltration of myeloid cells and elevated expression of arginase-1 (Arg-1). This study aimed to assess the levels of the pro-inflammatory cytokine IL-1β, arginase, and inducible nitric oxide synthase in mouse brain homogenates after proton irradiation at the Bragg peak, in both short- and long-term periods.

Speaker: Nguyễn Bảo Ngọc

46 Comparative analysis of behavioral responses and physiological parameters of mice under proton exposure and aging.

Within the framework of this work, a comparative analysis of behavioral reactions and physiological parameters of mice on 10 and 30 days after cranial irradiation with protons at a dose of 5 Gy and aging was carried out for the first time. The irradiation of mice was carried out at the phasotron of the JINR LNR medical-technical complex. On the 29th day after irradiation we evaluated the values of the index of spontaneous alternation in the T-maze. The number of alternations, repetitions in the choice of the arm and refusals in the passage of the maze among all groups of animals was counted. Motor asymmetry was also assessed. On days 10 and 30 after irradiation, the differences and dynamics of orienteering and exploratory behavior and observation of the level of emotional reactivity were assessed. On the 30th day after irradiation, cervical dislocation was performed, autopsy was performed with subsequent collection of biological material for further study: spleen, thymus and bone marrow cell suspension. Behavioral reactions of irradiated animals in the “Open Field” facility were found to be disturbed in relation to anxiety and adaptation (grooming and freezing acts). At the same time, no functional changes corresponding to those in aging were detected.

Speaker: Sofya Sakharova

47 Radiation biology research

Speaker: Daria Shamina (LRB)

48 INDUCTION OF DNA DOUBLE-STRAND BREAKS BY X-RAYS UNDER THE INFLUENCE OF THE COMBINATION OF DNA REPAIR INHIBITORS IN B16 MURINE MELANOMA CELLS.

In recent years, the studies aimed at changing cell radiosensitivity are of special interest, especially for malignant cells. Special attention is paid to the research on the formation and repair mechanisms of DNA double-strand breaks (DSBs), as they are the most severe molecular damage to DNA and can lead to cell death. Therefore, research focusing on understanding the formation and repair patterns of DNA breaks in tumor cells under the influence of ionizing radiation and the presence of DNA repair inhibitors is an urgent area of modern radiobiology research. In this research, the DNA Comet Assay method was used to determine the dependence of the frequency of DNA DSB formation and their repair kinetics in melanoma B16 cells upon X-ray irradiation under normal conditions and in the presence of inhibitors of DNA repair, 1-β-D-arabinofuranosylcytosine (AraC) and Benzamide. The obtained results showed that under the combined action of ionizing radiation and DNA repair inhibitors, the greatest amount of DNA DSBs is formed.

Speaker: Зуен Фам

14:00 Lunch

Free Time

18:00 Dinner

Event: JINR-QUIZ

Thursday 12 June

08:30 Breakfast

Plenary Talk: DLNP

49 Linac-200: a new research facility of JINR

Speaker: Алексей Жемчугов (JINR)

Section Talks: DLNP

50 Development of X-ray Monochromatization Devices for Energy Calibration of Pixel Semiconductor Detectors

Semiconductor pixelated detectors are expanding their applications in different fields: high-energy physics, medicine, environmental radiation monitoring etc. This class of detector has a high signal recording speed and, thanks to this, allows for the registration of every single photon at a sufficiently high flux. To achieve a good energy resolution of the detector of this class, the per-pixel procedure of energy calibration is required, and monochromatic X-ray sources are needed for that. Developed device at the DLNP allows for the generation of a monochromatic X-ray beam with an energy range of 15–100 keV and a monochromaticity of up to 6%, which will be useful for the procedure of per-pixel energy calibration of pixelated semiconductor detectors.

Speaker: TRUONG HOAI BAO PHI (JINR Dzhelepov Laboratory of Nuclear Problems)

51 Robustness test of a Micromegas detector with resistive DLC anode

Micromegas is a modern type of gas detector that combines good spatial resolution and loading capacity with reasonable cost and manufacturability. An unavoidable disadvantage of such detectors is their tendency to discharge when passing strongly ionising particles such as, for example, slow protons. This leads to the impossibility of using classical micromegas detectors in the high background loading conditions typical of hadron colliders such as NICA. The standard solution is to use detectors with an anode made of high resistivity material. In this case discharges become localised and do not lead to temporary inefficiency of the whole detector. One of the most promising methods to fabricate a resistive anode is the deposition of a diamond-like carbon (DLC) layer. The typical thickness of a DLC coating is about 0.1 µm. Such a small coating thickness requires confirmation that the coating is sufficiently resistant to the discharges inherent in detector operation

Speaker: Igor Liashko

52 Calculation of self-shielding correction for Neutron activation experiments at IREN facility using PHITS and MCNP6

Neutron self-shielding corrections are typically determined for activation samples exposed to an isotropic neutron source. However, at the IREN facility, activation samples are placed close to the Neutron Converter surface, where the neutron flux is anisotropic. This study aims to calculate neutron self-shielding corrections for various foil specimens based on the actual experimental setup. Monte Carlo simulations were performed using PHITS and MCNP6, the results were compared to assess consistency.

Speaker: Thanh Pham

53 Using Machine Learning Methods in Multi-Energy Computed Tomography.

The report presents developments that help segment areas containing lanthanide-based contrasts.

Speaker: Владислав Рожков (JINR)

54 Garfield++ simulation of the Micromegas detector

In the first phase of the Spin Physics Detector (SPD) experiment, the main tracking system will be complemented by a Micromegas-based central tracker. The Micromegas Central Tracker (MCT) will improve pulse resolution and tracking efficiency during the first years of SPD operation. The performance of these detectors in a magnetic field is influenced by the gas mixture used. The results of experimental studies and simulations of the detector performed with Garfield++ are presented

Speaker: Natalia Koviazina (JINR)

11:50 Coffee-break

Plenary Talk: Корсовет

Plenary Talk: Корсовет

14:00 Lunch

Free Time

18:00 Dinner

Friday 13 June

08:30 Breakfast

Free Time: Excursion Day

14:00 lunch

Free Time: Excursion Day

18:00 Dinner

Saturday 14 June

08:30 Breakfast

Plenary Talk: FLNR

55 Ускорительный комплекс Лаборатории Ядерных Реакций им. Г.Н. Флерова

Speaker: Ivan Ivanenko (FLNR JINR)

Section Talks: FLNR

56 GRAND Gas-Filled Separator

The GRAND gas-filled separator, located at the Factory of Superheavy Elements (SHE Factory) at the Joint Institute for Nuclear Research (JINR), operates at the DC-280 accelerator and is used in experiments aimed at the synthesis and investigation of heavy and superheavy nuclei. GRAND is involved in a variety of research directions: α-, β-, γ-spectroscopy (using the GABRIELA setup), studies of the chemical properties of superheavy elements, and planned mass measurements using MR-TOF. Currently, an experiment is underway on the synthesis of flerovium (Fl) using a ²⁴²Pu target and a ⁴⁸Ca beam. The GRAND separator remains a key instrument in studying the nuclear and chemical properties of new elements, providing broad capabilities for advanced experimental research.

Speaker: Mrs Irina Ulanova (Flerov Laboratory of Nuclear Reactions and Dubna State University)

57 STUDY OF NUCLEON TRANSFER PROCESSES IN THE REACTIONS 48Ca + 197Au, 40Ca + 197Au

The study of nucleon transfer reactions is an important field of heavy-ion physics, because such reactions provide the possibility of producing new exotic nuclei. Theoretical studies of the mechanisms of nucleon transfer are of great importance for planning and conducting experiments aimed at the production of neutron-rich nuclei located at the boundary of neutron stability [1]. In this work, we study elastic scattering in terms of the classical model [2] and nucleon transfer processes in the reactions 48Ca + 197Au, 40Ca + 197Au at energies above the Coulomb barrier based on numerical solution of the time-dependent Schrödinger equation for nucleons [3]. The nucleon transfer probabilities depend on the structure of single-particle states of the colliding nuclei; nucleons are mainly transferred from/to upper shells. Fig. 1. Differential cross sections of the channels of stripping and pick-up of protons of the 48Ca + 197Au reaction at a beam energy of 400 MeV For few-nucleon transfer, maxima for K, Ar and Sc are seen in the vicinity of the grazing collision angle. The angular distributions for multinucleon transfer (for S, P and V, Cr) are practically isotropic [4] (Fig. 1).
1. Yu.E. Penionzhkevich, R.G. Kalpakchieva, Light exotic nuclei near the boundary of neutron stability (World Scientific Publishing Co. Pte. Ltd., Singapore, 2022).
2. Yu. Ts. Oganesyan, Yu. E. Penionzhkevich, Nguen Tak An’, D.M.
Nadkarni, K. A. Gavrilov, Kim De En, and M. Yussonua, Sov. J. Nucl.
Phys. 18, 377 (1973).
3. V.V. Samarin et al. // Phys. At. Nucl. 2015. V. 78. P. 128.
4. V.V. Volkov, Nuclear physics research with heavy ions (JINR, Dubna, 2023).

Speaker: Ksenia Molotorenko (JINR)

58 Experimental study of Mass–Total Kinetic Energy distributions of fragments formed in the ⁴⁸Ca + ²⁰⁸Pb reaction

S. Sanila, E. M. Kozulin , G. N. Knyazheva, A. A. Bogachev, I. M. Itkis , K. V. Novikov, V. A. Rachkov, I. V. Pchelintsev, I. V. Vorobiev, Aniruddha Dey, R. S. Tikhomirov, K. A. Kulkov, E. O. Savelieva Flerov Laboratory of Nuclear Reactions, Joint Institute for Nuclear Research, 141980, Dubna, Russia ( ∗ Email:sanila@jinr.ru) The ⁴⁸Ca + ²⁰⁸Pb reaction is distinguished by its unique combination of advantages, as both interacting nuclei are doubly magic. The present work aims to investigate the characteristics of the mass–total kinetic energy (M–TKE) distribution of binary reaction products from the ⁴⁸Ca + ²⁰⁸Pb reaction, with a detailed examination of this reaction system. The experiments were carried out using the U400 cyclotron at the Flerov Laboratory of Nuclear Reactions, Dubna, Russia. Beams of ⁴⁸Ca with 208–281 MeV energies bombarded thin targets of ²⁰⁸Pb to populate the ²⁵⁶No compound nucleus (CN) at different excitation energies. The mass–energy distributions of primary binary reaction products were measured using the double-arm time-of-flight (ToF–ToF) spectrometer CORSET [1]. A detailed analysis has been carried out on the mass–total kinetic energy distribution of fission-like fragments obtained from the ⁴⁸Ca + ²⁰⁸Pb reaction. Reference [1] E. M. Kozulin et al., Instrum. Exp. Tech. 51, 44 (2008).

Speaker: Sanila Sathyan

59 The off-line tests of the Cryogenic gas stopping cell at the FLNR JINR

Современные прецизионные эксперименты в области ядерной физики требуют ионных пучков высокого качества. Это утверждение справедливо как для первичных пучков, ускоренных на циклотроне, так и для вторичных пучков, полученных в результате ядерной реакции. В данной работе содержится информация о новой установке под названием Криогенная газовая ячейка охлаждения ионов или Газкэтчер в лаборатории ядерных реакций им. Г. Н. Флерова Объединенного института ядерных исследований. Установка является близким аналогом «The cryogenic gas stopping cell» в GSI. Основной задачей Газкэтчера является преобразование вторичных пучков редких ионов, полученных в ядерных реакциях, с высокой энергией и большим эмиттансом, в низкоэнергетические пучки с малым эмиттансом и малым энергетическим разбросом. Данная установка является необходимым элементом для проекта многоотражательного времяпролетного масс-спектрометра MR-TOF-MS по прецизионному измерению масс сверхтяжелых элементов. В настоящее время эта установка находится на стадии тестирования и отладки. В работе представлены полученные на текущий момент результаты.

Speaker: Алексей Новоселов (FLNR JINR)

11:40 Coffee-Break

Section Talks: FLNR

60 Utilization of prompt gamma-ray spectroscopy using segmented gamma detectors in experimental setups

High resolution gamma-ray spectroscopy is one of the powerful tools in the field of experimental nuclear research, and has been extensively utilized to study innumerable aspects of nuclear structure and reaction dynamics. Large array of Gamma detectors consisting of different types of segmented HPGe detectors holds the future of Gamma-ray spectroscopy measurement technique in the upcoming experimental setups. The present research work is aimed to study the fundamental characteristics of typical gamma-ray detectors. The detailed results obtained during the short-term research project work under the JINR INTEREST (INTErnational REmote Student Training) program by the participating students from different countries under my supervision will be reported during the conference.

Speaker: ANIRUDDHA DEY

61 Описание работы ЖРО и газоочистки систем циклотронов

Проблема обращения с радиоактивными отходами — одна из ключевых, от решения которой зависит дальнейшее развитие атомной энергетики и промышленности. Жидкие радиоактивные отходы (ЖРО) представляют наибольшую экологическую опасность из-за большого объёма, высокой суммарной активности и возможности неконтролируемого распространения.

Speaker: Alexandr Zudin

62 Preliminary tests of the high charged state ECR ion source for the specialized DC140 cyclotron (DECRIS-5M)

В настоящее время в Лаборатории ядерных реакций ОИЯИ ведутся работы по созданию циклотронного комплекса DC-140, предназначенного для решения широкого круга прикладных задач. Одним из основных направлений работы комплекса будет производство трековых мембран и тестирование микросхем на радиационную устойчивость. Циклотронный комплекс включает в себя изохронный циклотрон DC-140 для ускорения интенсивных пучков тяжелых ионов с отношением массы к заряду A/Z в интервале от 5 до 5.5 до двух фиксированных энергий: 2,124 и 4.8 МэВ на единицу массы. Циклотрон оснащен системой аксиальной инжекции и источником ионов DECRIS-5M с рабочей частотой 18 ГГц. В работе представлены основные параметры источника DECRIS-5M и результаты первичных испытаний.

Speaker: Кирилл Берестов (JINR)

63 Natural Radionuclides in Rice Soils in the Mekong Delta Region, Vietnam: Health Risk, Transfer to Rice, and Long‑Term Accumulation in Topsoil

In the world, many studies have focused on the natural radioactivity in agricultural soils and food crops and the transfers of radionuclides between two components. However, the influence of longterm agricultural practices on the activity concentrations of radionuclides in the soils remains unclear. On the other hand, the soil-to-plant transfer factors of radionuclides for a specific plant type are different between the regions of the world. In this study, activity concentrations of natural radionuclides in 16 rice and corresponding soil samples in the Mekong Delta region of Vietnam were measured by a gamma spectrometer with a high purity germanium detector. The accumulation rates of radionuclides were predicted by using a model based on the balance between input and output rates of radionuclides in the topsoil. From the results of this study, it is evident that irrigation system is the main factor that caused accumulations of radionuclides in the soil. Water leaching and rice uptake were two processes that were responsible for the rejection of radionuclides from the soil. The accumulation rates of radionuclides are therefore controlled by changing the cultivation conditions.

Speaker: Бинь Ле (IREN Neutron Activation Analysis group)

64 Time-correlated single photon counting technique in optical spectroscopy of MgAl2O4

Time- correlated single photon counting (TCSPC) technique as a powerful analysis tool be used in fluorescence spectroscopy and imaging to measure the fluorescence lifetime of sample. In this report, by analyzing the decay curve of Al2O3 and MgAl2O4 single crystals irradiated by high energy Xe and Bi ions to several fluences. The measurements of the photoluminescence decay curves indicated lifetime increases with emission wavelength increasing in spectral range of 480-660 nm and decreases with ion fluence increasing. It is suggested that reduction of the decay time with ion fluence is due to growing contribution of nonradiative processes that quench the luminescence yield. The dependence of characteristic lifetimes on registration wavelength is explained by the peculiarities of the charge-transfer processes between defects or defect impurity sites in radiative de-excitation.

Speaker: Phuong Thao Le Thi

Plenary Talk: Корсовет

14:00 Lunch

Free Time

18:00 Dinner

Closing Ceremony

Event: Farewell Party

Sunday 15 June

08:30 Breakfast

Free Time

Departure of the Participants