This work discusses the development of structured cathodes of various configurations coated with 10B4C for thermal neutron detectors. The cathodes are made of 50 ฮผm thick aluminum foil and have a ฮ-shaped surface. The feasibility of using structured cathodes is evaluated based on theoretical calculations of the single-layer thermal neutron detector efficiency as a function of the ฮ-shape ridge...
Precision high-voltage power supplies are important control equipment for research and applied science installations: sources and accelerators of charged particles, X-ray machines, laser equipment, electro-optical modulators, electron microscopes, microwave and vacuum equipment etc. Described R&D activity is based on the use of experience in the development and implementation of high-voltage...
Baryonic Matter at Nuclotron is a fixed-target experiment at JINR, Dubna to study heavy ion collisions at beam energies up to 4 AGeV. The new Highly Granular Neutron Detector is being developed to measure neutron yields, neutron energy spectrum and neutron azimuthal flows at the BM@N experiment. Detector design employs time-of-flight measurements for neutron energy reconstruction. Data readout...
The ASHIPH (Aerogel โ SHifter - PHotomultiplier) threshold Cherenkov counter system [1] is considered as an option for the particle identification system of the Super Tau-Charm Facility (STCF) in China [2]. To meet the requirements for separation of pions and kaons with momenta up to 3 GeV/c at high load (6 ns between beam collisions), the use of silicon photomultipliers (SiPMs) and the use of...
The evolution of charged particle distribution function is described by Fokker-Planck equation. The stationary solution of Vlasov-Fokker-Planck equation that takes into account space charge induced field and predicts the equilibrium line density of circulating bunch is the Haissinski equation. In this work we have described the method of rms momentum spread $ฯ_ฮด$ measurement from longitudinal...
The Geant4 toolkit is widely used in basic and applied sciences to model radiation propagation in matter [1,2]. Several hadronic models [3-5] are implemented in the Geant4 library to simulate nuclear reactions induced by different particles colliding with nuclei of various materials. The Geant-val web application [6] has been designed to validate model performance for specific tasks. Reference...
One of the subsystems of the phase 1-st of the SPD experiment is the Beam-Beam Counter (BBC). The BBC is designed as a high granularity scintillation detector, divided by sectors and containing about 800 channels.
Previously, a series of studies was conducted for the selection of optimal prototype materials, and a method for testing a single scintillation tiles was proposed. A prototype of...
The aim of this study was to determine the mass of a high-purity germanium (HPGe) detector, similar to that used in the $\nu$GeN experiment, and to compare this estimate with the manufacturer's specified value. Experimental measurements were performed on a low-background setup using a dissolved uranium calibration source. Mass estimates were obtained from Monte Carlo simulations implemented in...
The threshold aerogel Cherenkov counters made by the ASHIPH method (Aerogel, Shifter and Photomultiplier) currently are being upgraded for the SND detector (VEPP-2000, INP SB RAS) in order to improve the quality of particle identification. The main idea of โโthe upgrade is to replace the MCP PMT on more efficient Silicon PMTs (SiPM), which have PDE in maximum of up to 40%. An optimal...
In modern high energy physics detectors a calorimeter is one of the most important system to measure the energy of elementary particles. The paper is devoted to Belle II calorimeter operated at KEK. The calorimeter is based on 8736 CsI(Tl) scintillation crystals. Signals from counters are processed by electronic modules as a result recovering information about energy and time of the detected...
The SPD experiment for the NICA collider (JINR, Dubna) is currently under development. Its goal is to study the spin structure of nucleons in collisions with momenta up to 27 GeV/c. Preliminary estimates indicate that in the end-cap section of the detector, the momenta of ฯ and K mesons can reach up to 6 GeV/c. For efficient particle identification with a confidence level better than 3ฯ, a...
The fixed-target BM@N experiment at Nuclotron is a part of the NICA facility at JINR (Dubna, Russia). It studies dense baryonic matter with light and heavy ion beams with the kinetic energies of 2โ6~GeV per nucleon. Since 2017, the BM@N physics program has included investigations of Short-Range Correlations (SRC), short-lived fluctuations of nucleon pairs where two nucleons have high relative...
Large-scale scientific installations, such as NICA and its subsystems, comprise a complex array of hardware that requires constant oversight during operation. Therefore, it is necessary to develop a tool for centralized device management and monitoring, known as the Slow Control System (SCS). This report discusses the current development status and future prospects of the SCS for the MPD...
Cryogenic technology has been constantly developing due to the advent of relatively inexpensive and high-quality superconducting cables, including those of domestic production. Thermometry system based on cryogenic temperature sensors and special measururement electronic modules is an important element for ensuring and monitoring the operation of cryogenic devices and complexes.
The article...
The Multi-Purpose Detector (MPD) being developed for the NICA project comprises a Time-Projection Chamber (TPC) whose performance is highly sensitive to temperature non-uniformities in the drift volume. Small temperature fluctuations change working gas density and hence electron drift velocity, degrading detectorโs spatial and temporal resolution. Acceptable temperature inhomogeneities are...
Pulsed research reactors are a unique type of neutron source, as they can produce a very intense flux of neutrons for a very short period of time, something that is difficult to achieve in steady-state reactors. Periodically Pulsed reactors are found exclusively in Russia, in the city of Dubna, where four reactors have been operated in succession, representing the stages of development of this...
A system of trigger detectors was developed and successfully operated in the BM@N experiment during the 2023 run with ยนยฒโดXe ions at 3.8 AGeV and beam intensities up to 10โถ ions per spill. The trigger beam counters are based on thin scintillators and specialized photomultiplier tubes that provide good pulse-height resolution and picosecond timing in the strong magnetic field of the BM@N magnet....
Measuring differential energy spectra for muons from cosmic rays in the energy range of 100 MeV โ 1 GeV is of particular interest for studying the properties of the heliosphere, magnetosphere and atmosphere of the Earth. Variations in the flux of low-energy muons from the decay of pions and kaons formed in the Earth's atmosphere due to the interaction of primary cosmic rays should be most...
This study presents the improved results of thermal neutron beams at horizontal channels No. 2 and No. 3 of the Dalat Nuclear Research Reactor (DNRR)- Viet Nam, by replacement of the original silicon crystal filters with sapphire C-plane (0001) crystal rods. The filter configurations were investigated through neutron spectrum calculations as a function of filter length using the FILTER-8 and...
The ฮฝGeN experiment is designed to study rare low-energy neutrino interactions using a germanium detector located under the Kalinin nuclear reactor. Because the expected signals are extremely small, the analysis relies on careful data treatment. Signals from different electronic channels are combined to suppress noise, while graphical and timing cuts are applied to remove spurious pulses...
Straw Tracker will be one of key detectors of the SPD experiment at the NICA collider. At all steps of the tracker design and development, it is crucial to evaluate performance of early stage prototypes in order to reach the best tracking performance.
These tests are carried out using a dedicated setup equipped with a reference tracking system consisting of Timepix4 and MicroMegas detectors....
The report is dedicated to detailed simulation studies of different options of the straw drift tubes readout electronics aiming the best performance of the SPD Straw Tracker. The Straw Tracker of the SPD detector should provide track coordinate measurements and also should serve the Particle Identification of low momentum charged particles. This requires simultaneous precise measurement of the...
This study investigates the use of electron beam treatment on aluminum-coated stainless-steel cladding materials to improve their performance in fast reactor operations. Fast reactors require materials that possess excellent thermal and mechanical properties, along with strong resistance to corrosion and radiation damage. Stainless steel, known for its durability and strength, can be further...
In accelerator complexes with electron cooling systems, minimizing of beam emittance is a critical factor determining the maximum cooling rate and efficiency of the process. For numerical simulations, mathematical models of the beam transport channel from the Linac to the Booster and the Booster are used. Matching of the beta functions at the boundary is achieved by adjusting the currents in...
Improving the durability and informativity of the recorded scattering patterns in neutron spectrometers is one of the key challenges. The use of a solid-state converter is not only a perspective alternative to ยณHe gas converters but also an essential measure for enhancing the performance and durability of thermal neutron detection systems. Resistive plate chambers are traditionally used in...
ะ ัะฐะผะบะฐั ะฝะฐััะฝะพะน ะฟัะพะณัะฐะผะผั ะะะฏะ ะฟะพ ะธััะปะตะดะพะฒะฐะฝะธัะผ ะฒ ะพะฑะปะฐััะธ ัะธะทะธะบะธ ะฒััะพะบะธั ัะฝะตัะณะธะน ะฒะตะดะตััั ัะฐะฑะพัะฐ ะฝะฐะด ะฟัะพะตะบัะพะผ ัะพะทะดะฐะฝะธั ััะบะพัะธัะตะปัะฝะพะณะพ ะบะพะผะฟะปะตะบัะฐ NICA (Nuclotron based Ion Collider fAcility). ะะปั ะธะทััะตะฝะธั ัะธะทะธัะตัะบะธั ะฟัะพัะตััะพะฒ, ะฟัะพะธัั ะพะดััะธั ะฟัะธ ััะพะปะบะฝะพะฒะตะฝะธะธ ััะถะตะปัั ะธะพะฝะพะฒ, ัะฐะทัะฐะฑะพัะฐะฝ ะผะฝะพะณะพัะตะปะตะฒะพะน ะดะตัะตะบัะพั (Multi-Purpose Detector, MPD), ะบะพัะพััะน ะฑัะดะตั ัะฐะทะผะตัะตะฝ ะฒ ะพะดะฝะพะน ะธะท ัะพัะตะบ ะฒะทะฐะธะผะพะดะตะนััะฒะธั...
A multifunctional setup has been developed for testing first prototypes of the SPD Straw Tracker. The setup was successfully operated during test beams at CERN in 2024 and 2025, combining a wide range of detectors and front-end electronics. It includes a reference timing system formed by four trigger scintillator counters with coincidence logic. The reference tracking system consists of a set...
The report presents the results of the development of a heterogeneous scintillator for detecting thermal neutrons. A composite of NE 912 glass scintillator granules placed in a polymer binder was considered. The goal of the development is to reduce the gamma sensitivity of the detector while maintaining high efficiency to thermal neutrons. The structure of the composite was optimized using...
Plastic scintillators offer significant advantages for particle detection, including high density, exceptional light yield, excellent energy resolution for precise energy measurements, fast signal response, capability for fine segmentation enabling high-precision tracking, and robustness for working with particle beams. Recently, cubic plastic scintillators have been successfully used in a 3D...
