$ Kildiyarov$ $ T.V.^1, Galkina$ $S.V.^{2,3}, Lugovtsov $ $ A.E.^4, Sveshnikova $ $ A.N.^{1,2,3} $
$ $
$^1$FFPCE Lomonosov MSU, Moscow, Russia
$^2$CTP PCP RAS, Moscow, Russia
$^3$FRCC PHOI, Moscow, Russia
$^4$FP Lomonosov MSU, Moscow, Russia
e-mail: kildiyarovtv@my.msu.ru
$ $
Any living system must continuously exchange energy, matter, and...
The problem of the release of metal nanoparticles into the environment is becoming very relevant. Increasing production and consumption of nanomaterials leads to pollution of aquatic and terrestrial ecosystems, creating human health and safety risks. Calendula officinalis plants, which are valuable plant raw materials for medicine and pharmaceutics, were chosen as the object of research. The...
The BM@N experiment is the first working installation at the NICA collider complex. The aim of the experiment is to study the properties of baryonic matter in the collision of heavy nuclei with a fixed target. During a physical session in December 2022-February 2023, about half a billion Xe nuclei interaction events with a stationary CsI target were collected. For correct processing of...
Baikal-GVD is a large (∼1 km3) underwater neutrino telescope located in Lake Baikal, Russia. This paper presents a neural network for separating events caused by extensive air showers (EAS) and neutrinos. By choosing appropriate classification threshold, we preserve 90% of neutrino-induced events,while EAS-induced events are suppressed by a factor of 10-6. A method for...
The Baikal-GVD online data processing and alert system was launched at the beginning of 2021. It is designed for fast online neutrino event reconstruction and, when a potential signal from an astrophysical source is detected, sending an alert message to collaboration members. It also searches for matches between internal alerts and other astrophysical experiment alerts. This contribution...
Correlation femtoscopy allows one to estimate the spatial and temporal characteristics of the particle-emitting region formed in the relativistic heavy-ion collisions. Azimuthally-differential analysis is used to study shape and orientation of the source. In this work, collisions of isobaric nuclei Ru+Ru and Zr+Zr at $\sqrt{s_{NN}} = 200$ GeV are calculated using the UrQMD (Ultrarelativistic...
The measurement process in the deterministic de Broglie-Bohm theory is investigated. The simplest devices for measuring coordinates and momentum are modeled, while both the measurement device and the quantum system are described by the same unified laws. Thus, the problem with the probability distribution in the momentum space, posed in the works \cite{kurt,naun,heim}, is solved. The...
In magnetic fluids, when exposed to a magnetic field, optical effects are observed: birefringence, dichroism, changes in optical density, change of the intensity of scattered light, and others. The nature of these effects depends on the particle size, size distribution, chemical composition, solid phase concentration, temperature, etc. Studying the influence of magnetic particle aggregates on...
An analysis of reliability of existing experimental (EXFOR database) and evaluated (TENDL-2021 and IRDFF-II libraries) cross section data for $(\mathrm{n},\,2\mathrm{n})$, $(\mathrm{n},\,\mathrm{n}'\gamma)$ and $(\mathrm{n},\,\mathrm{p})$ reactions initiated by neutrons with energies up to 20 MeV with the formation of ${}^{114,115}\mathrm{In}$ and ${}^{91}\mathrm{Y}$ isotopes in isomeric...
BM@N is a fixed-target experiment aimed at studying of heavy ion collisions at beam energies up to 4 A GeV. The new High Granular Neutron detector (HGN) is being developed for this experiment. This detector will be able to carry unique measurements of flow of the neutrons. Due to these measurements it will be possible to explore the isospin degree of freedom of the QCD phase diagram.
This...
Two LiInSe2 single crystals, grown under different conditions, have been studied. Characteristics of these crystals for neutron detection have been compared using scintillation detection method due to the neutron capture by lithium nuclei and subsequent emission of charged particles and the conventional method of charge extraction from single-crystal surfaces due to the same nuclear reaction....
Experimental justification of the equation of state of nuclear matter at extreme densities is rather difficult under terrestrial conditions, and therefore studying of neutron stars remains valuable. For a long time, the main testable quantity was the maximum mass of a neutron star. In 2017, the gravitational signal from the merger of neutron stars was detected and a new characteristic, tidal...
The work is devoted to the creation of an automatic frequency control system for the harmonic station RF3 of the NICA collider. The special attention was paid to the main tasks and the algorithm of the station’s work. Based on the studied modes of station’s operation, a program for generating control pulses was developed, they use for moving the tuners which set up the station to the resonant...
Halobacterium salinarum is a rod-shaped motile extremely halophilic archaea, capable of living in saturated salt solutions. It is believed to be extremophile as its natural habitat is characterized by extreme UV radiation and inconsistent nutritional conditions. Although Halobacterium salinarum is an aerobic chemoorganotroph, it can also survive in anaerobic conditions by utilizing light...
Introduction
The presented design describes a prototype of an application specific integrated circuit (ASIC) for use with silicon microstrip sensors of the BM@N (Baryonic Matter at Nuclotron) facility [1] at the upcoming NICA collider.
The structural diagram, developed layout, and main electrical parameters of the ASIC are presented.
The prototype ASIC includes all the main complex...
An integral part of modern scientific research is collaboration on various types of documents. To organize and facilitate this work, various systems from the class of document management are typically employed. In this regard, the DocDB is used at the Joint Institute for Nuclear Research (JINR), and several independent instances of it for different projects are currently in operation. However,...
The paper presents the main stages of creating a data acquisition system from a gas one-dimensional position-sensitive detector with a resistive anode wire based on the SciCompiler, and also gives a brief overview of the SciCompiler software package and the DT5560SE digitizer from CAEN.
The effect of neutron radiation on the optical and electronic properties of doped heterostructures with an AlGaAs/InGaAs/GaAs quantum well is experimentally studied. The effect of neutrons on the degradation of electron concentration and mobility, as well as on changes in the photoluminescence spectra of heterostructures, is discussed.
This paper investigates the effect of the magnetic component of microwave radiation on the dynamics of the electric current and magnetization of the Josephson junction φ0. Previous studies show that exposure of SFS junctions to radiation leads to a number of interesting phenomena that can be utilized in future electronic devices. We have used the Landau-Lifshitz-Hilbert equation and the...
The Friedberg-Lee-Sirlin (FLS) model is a well-known renormalizable theory of scalar fields that provides for the existence of non-topological solitons. Since this model was proposed, numerous works have been dedicated to studying its classical configurations and its general suitability for various physical problems in cosmology, quantum chromodynamics, etc. In this paper, we study how Q-balls...
ALICE3 is a next-generation heavy-ion experiment at the Large Hadron Collider, a successor of the ALICE experiment. It opens a high-precision domain of the strongly interacting matter studies. A set of measurements of the ALICE3 requires electron identification with high efficiency and purity, which will be performed by several complementing experimental techniques. Feasibility of electron...
Modern technically sophisticated facilities need tools that provide a way to keep logbooks of the events and activities, during both commissioning and operations. This talk describes a new electronic logging system currently being developed at the MLIT for use in the accelerator complex of LHEP. A prototype logbook based on the developed system is introduced, highlighting its primary...
In this work we present the results of the study of components for a future modular reactor antineutrino detector which use inverse beta decay reaction for antineutrino detection and based on solid-state plastic scintillator and lithium scintillator for neutron capture $^{6}$Li$_{2}$CaSiO$_{4}$ . Studies of samples of plastic scintillators have been carried out: estimates of the energy...
Enhancing object recognition by optimizing sharpness
Deeva Olga(a), Inna Kolesnikova(b), Oksana Streltsova(b), Marko Ćosić(c)
(a) National Research Nuclear University MEPhI
(b) Joint Institute for Nuclear Research, Laboratory of Radiation Biology, Dubna, Str. Joliot-Curie 6, Russia
(c) Institute of Nuclear Sciences Vinča, National Institute of Republic of Serbia, University of...
One of the most promising ways to obtain a dense ZTA material at relatively low sintering temperatures can be the use of metastable γ+θ-Al2O3 phases as a basis for composite ceramics. The work [1] shows the possibility of obtaining dense composite ceramics of the Al2O3 - YSZ system based on metastable powders γ + θ-Al2O3 at lower sintering temperatures compared to powders of the stable phase...
Circle fit routines are used in helix reconstruction for tracking and in ring reconstruction for particle ID. While accurate fits can be achieved with iterative fits, often resolution can be relaxed in favor of speed. We present and compare two flash-algorithms in terms of resolution, CPU speed and mathematical advantage (linearity). The second algorithm is new internationally.
In the work gravitational wave conversion to electromagnetic wave during propagation in external magnetic field is considered for expanding FLRW universe. Initially, only tensor mode is present in the problem and then it propagates in the medium with a magnetic field - cosmological magnetic field for example. System of differential equations are derived for tensor and scalar modes of...
Relativistic heavy ion collisions at a few GeV energy region provide a valuable insight for the properties of strongly interacting matter at high baryon densities. Studying the yields of various particle species produced in the reaction as well as their collectivity may shed light on the Equation of State of the matter created for the brief moments during the collision. We discuss the methods...
One of the main goals of developing a new multi-energy X-ray tomograph is the recognition of materials using spectral information. The Medipix and Timepix series detectors are one of the pixelated semiconductor hybrid detectors developed in Medipix collaboration. These detectors have high spatial resolution and are capable of detecting radiation over a wide energy range. It makes possible...
Small-angle neutron scattering (SANS) is a particularly powerful method that makes it possible to study inhomogeneities in the volume of macroscopic samples at scales from several to several hundreds of nanometers. Magnetic SANS is used to study a wide range of magnetic materials, including amorphous metals, nanocrystalline hard and soft magnetic materials [1]. Scattering occurs due to the...
A new (improved) model of inflation and primordial black hole (PBH) formation is proposed by combining the Starobinsky model of inflation, Appleby–Battye–Starobinsky (ABS) model of dark energy, and a quantum correction in the modified F(R) gravity. The energy scale parameter in the ABS model is taken to be close to the inflationary scale, in order to describe double inflation instead of dark...
Annotation. Metal oxide catalysts (MOCs) for the growth of carbon nanotubes with the general composition Fe2Co/CaCO3 were synthesized using the polymerized complex precursor (PCP) method using chelating agents. It has been established that metal oxide catalysts synthesized by the method of polymerized complex precursors are an order of magnitude more effective than MOCs synthesized by the...
Ferritin is a typical protein cage structure which is formed from 24 polypeptide subunits by the process named self-assembly. An assembled globule of ferritin is shaped into a hollow sphere with the key function of iron storage [1]. Thus, ferritin is able to store up to 4500 iron atoms within its shell [2] in the form structurally similar to ferrihydrite (5Fe2O3·9H2O) [3]. Ferritin is commonly...
In this work, the influence of the first forbidden beta transitions on the accuracy of reconstruction of cumulative reactor antineutrino spectra of uranium and plutonium fission products by conversion of the corresponding cumulative beta spectra is investigated. It is shown that the most reliable way to account for forbidden transitions is a direct ab initio calculation of the forbidden...
The Double Chooz experiment has obtained its most precise measurement of the neutrino mixing angle θ13 so far exploiting for the first time its multi-detector (far and near) configuration. The improvement of this value relies on the increase of statistics as well as a major reduction of reactor and detection systematics thanks to the iso-flux configuration and a novel detection technique,...
A spiral generator is a simple device that stores electrical energy at one, relatively low voltage, and discharges the stored energy in the form of a short electrical pulse with a higher voltage than the stored one. To increase the efficiency and normal operation of the generator, it is necessary that the impedance and response time of the key be much less than the impedance and time of...
https://docs.google.com/document/d/1hACqJpFey1oxryN7u2yeZP-hPxTL7TzL/edit?usp=sharing&ouid=117450093534487682532&rtpof=true&sd=true
We develop the method to obtain approximations to the solutions of differential equations with slowly varying coefficients. We demonstrate this method applying it to the linear partial differential equation of the first order and to the time-dependent Schrodinger equation in one dimension. Using the approximation to the solution of the Schrodinger equation, it is possible to calculate the...
Future linear ${e^-}{e^+}$ colliders with an energy of $\sqrt{s}\geq 500$ GeV are the best options for searching and studying $Z'$ due to the high sensitivity of the process ${e^-}{e^+}\rightarrow{f}{\bar{f}}$ to the effects of $Z'$ at high energies, and especially if there is a possibility of polarization of $e^{-}$ and $e^{+}$ of the beams.
The current limits on the mass of $Z'$ obtained...
Stopping power of charged particle with an energy of several MeV and a charge variaty from one proton charge to several tens leads to failures in microelectronic devices designed for rapid storage and storage of information. For example, we are talking about failures, leading to the recharging of an memory element containing one or more transistors. The path length of ions with an energy of...
The work presents approaches to estimation temperature effects occurring in the reactor core. Rough approximations for fuel assemblies and core design are considered.
The report is devoted to the development and implementation of a monitoring system for the stand of amplifiers of the harmonic station of the second type - HF2. The monitoring system presented in this report has been developed to ensure continuous monitoring and control of the operation of the bench amplifiers. It includes sensors, software with a warning system about possible failures or...
The effect of neutrino quantum decoherence has been studied actively in recent years (see [1-3] and references therein). In our present paper we consider the interaction with an arbitrary reservoir in thermodynamic equilibrium. We have found that within a fairly wide class of theoretical models the parameters of neutrino quantum decoherence are proportional to the neutrino decay rates into a...
The High Granular Neutron Time-of-Flight Detector (HGND) at the BM@N experiment will be used for measurement of neutrons produced in nucleus-nucleus collisions. For the first time, the prototype of the HGND was used in Xe+CsI at 3.0 and 3.8 AGeV run at the BM@N. The multilayer structure (absorber/scintillator) of the detector makes it possible to identify and measure the energies of neutrons...
Global hyperon polarization is an important observable for studying the properties of the strongly interacting matter produced in relativistic heavy ion collisions. It is emerging due to the presence of initial angular momentum in non-central heavy-ion collisions and is growing with decreasing energy. Detailed study of global hyperon polarization at NICA energies is an important goal of the...
The production of nuclear energy, the use of diagnostic radiation or radiation treatment, or work in radiation- harmful conditions, including research laboratories, can cause human exposure. It is known that radiation exposure can have variety effects on the body, tissues, cells etc. There are many works concerning damage effect of ionizing radiation influence on the central nervous system as...
Laser confocal microscopy technique (60ps lazer pulse excitation at 445nm) and a Time Correlated Single Photon Counting (TCSPC) technique have been used to study the photoluminescence (PL) in 152 MeV Xe ion irradiated MgAl2O4 single crystals. It was shown that radiation defects produced by swift xenon ions give rise to broad luminescence band positioned in the 470-800 nm wavelength range. The...
The analysis of electromagnetic radiation serves as a primary method for studying the Universe that surrounds us. The main mechanisms for the generation of electromagnetic waves by charged particles can be conditionally divided into bound-bound transitions (atomic and molecular), bound-free transitions (recombination of ions), and free-free transitions (bremsstrahlung radio emission of...
This work is devoted to finding the optimal design of an Outer Veto for the DarkSide-20k experiment being built in the Gran Sasso National Laboratory (Italy). The DarkSide-20k experiment seeks to directly detect dark matter in the form of weakly interacting massive particles (WIMPs). The DarkSide-20k detector is a two phase time projection chamber (TPC) filled with 50 tons of underground...
Periodic Pulsed research reactors The IBR-2 type in Dubna is the most effective source of slow neutron extracted beams for studying various structures by diffraction, small-angle scattering, reflectometer, inelastic scattering, and neutron diffraction, due to a short neutron pulse and a high average flux of up to 10 E + 14 cm2 s-1. At the same time, due to the specificity of the kinetics,...
PXI-compatible card combining amplifier and preamplifier for proportional gas counters is presented. This PXI-compatible amplifier/preamplifier is developed for purpose of usage with proportional gas counter sensitive to 14.4 keV and PXI-based Mössbauer spectrometers developed on Palacký University in Olomouc. The card is based on Amptek A225 and Amptek A206 integrated circuits. It allows...
A model of the α-cluster radioactivity of even-even nuclei is presented.
In this model, the collective motion in mass-asymmetry coordinate determines the probability to form a cluster in the surface region of the nucleus [1].
The tunneling in the coordinate of the relative distance between the centers of mass of the
cluster and the daughter nucleus determines the penetrability of the...
F-type ATP synthase is a large protein complex that synthesizes ATP from ADP and phosphate. It plays a key role in the bioenergetics of any organism. There are three classes of F-type ATP synthase: bacterial, chloroplast, and mitochondrial. Despite significant structural similarities, there are also significant differences between different ATP synthases. Specifically, mitochondrial ATP...
The project “Siberian Ring Photon Source” (SKIF) is under development. This source of 4+ generation synchrotron radiation will allow for research in various fields of science. SKIF project consists of a synchrotron, a storage ring and a linear accelerator. The linear accelerator is designed for an energy of 200 MeV. In the ring of the storage ring, electron beams gain the energy of 3 GeV...
Molecular electronics may provide novel functionalities out of the scope of the traditional silicon-based electronics. This work is aimed at a study of a charge transport in a benzene molecule that is a representative member of a broad class of cyclic molecules. Due to many pathways for a charge propagation, quantum interference effects determine peculiar transport properties in these...
Soil plays important role in food production, as well as participates in regulating the chemical composition of the atmosphere, so accurate determining the concentration of different chemical elements in soil today remains an important task for various fields of science.
Nowadays, it seems promising to determine the concentration of different chemical elements in the soil using so-called...
The problem of creating transplants to replace and stimulate the regeneration of damaged organs or tissues in medicine is of critical importance. In particular, there are various pathologies of the cornea of the eye (injuries, degenerative processes) that cause irreversible changes and lead to blindness. The mammalian corneal stroma can serve as a potential material for creating an artificial...
We consider the statistical mechanics and thermodynamics of a rotating ideal gas of classical continuous helicity particles travelling in three-dimensional Minkowski space. By constructing a phase-space and determining an invariant measure on it, we obtain a one-particle distribution function for the system with constant temperature and angular velocity. We show that macroscopic rotation...
The accelerator technology development requires more and more accuracy improvement of both the manufacture of magnetic elements and their positioning during the accelerator installation. To control the quality of the created magnetic elements, there are various methods of magnetic measurements. Most of the actively used methods involve the use of special precision stands, and therefore...
The purpose of my research work is a computational and theoretical
justification of the design of a laboratory source for modeling
astrophysical phenomena associated with superluminal EMR sources.
An
elliptical emitter based on a photodiode with laser initiation was chosen as the basis for a generator that would allow us to simulate the phenomena of interest
to us. [RF Patent No....
The shortage of drinking water is a dilemma faced by our country and the world at large. Whereas approximately 96% of water on earth is rich in salinity, desalination of brackish and seawater is a promising technology for resolving water crisis. However, present desalination technologies are linked with hindrances such as high energy consumption and high maintenance costs. Capacitive...
Goal of the work:
Create an axiomatic equivalent to the axiomatics of Haag-Araki and Whiteman, based on the principle of causality for sticky sets.
Relevance of the work:
The new mathematical apparatus proposed in this paper, which includes elements of various interpretations of quantum field theory, nonlinear dynamics and p-addic physics, allows us to solve the problem of constructing a...
We consider the $\alpha_s$ order of the Drell-Yan process with Z and W boson production, where one hadron is polarized. Our work focuses on calculating the helicity structure functions, which determine the angular distribution of leptons in the pair rest frame. The calculation is performed using the collinear approximation.
The Resource Sharing Centre «The Siberian Circular Photon Source» ("SKIF") is a fourth-generation synchrotron radiation (SR) source currently under construction in Novosibirsk. "SKIF" will require unprecedented orbit stability because the effect of seismic noise might become a relevant source of brighness loss, several studies have been conducted to characterise the actual ground motion in...
The longitudinal coordinate of origin of the photon produced in collider experiment is usualy relatively poorly measured. Therefore in case of diboson production in pp collisions there is the distinct possibility that some events of interest passing the final selection in data are actually from two overlapping hard scatter processes, else pile-up background.
In this study a Monte-Carlo-based...
The multi cavities S-band klystron with an output pulse power of 50 MW is developed at Budker Institute of Nuclear Physics SB RAS. Such klystrons are needed for many fundamental scientific projects: SKIF, Super C-tau factory etc.
The input cavity is one of the most important cavity in the klystron. Its quality influences on the gain and efficiency of the klystron. The input cavity should...
The Spin Physics Detector is an experiment at NICA designed to study the spin structure of the proton and deuteron and the other spin-related phenomena using polarized beams.The collision energy is up to 27 GeV and the luminosity is up to 10^32 cm^−2 s^−1 in pp mode.
Two scintillator-based detectors, Beam-Beam Counters (BBC), will be installed upstream and downstream the interaction point...
The multilayer neutron detector for the SCAN-3 spectrometer at the Nuclotron accelerator has been developed. Neutron detector consists of a set of 3x2 modules covering total area of 80*54 cm2. Each module represent 4-layer scintillator detector with dual light readout from scintillator plates by PMTs. Set of modules has been tested by the cosmic rays. The results of the research of individual...
The Spin Physics Detector (SPD) at JINR NICA complex is currently under construction [1]. The straw tracker detector is aimed to reconstruct the primary and secondary particle tracks and to determine their momenta. For the stage of the SPD active operation it is necessary to develop
fast data processing algorithms for online data collection, event selection and primary vertices...
The Spin Physics Detector is an experiment at NICA designed to study the spin structure of the proton and deuteron and other spin-related phenomena using polarized beams. Two Beam-Beam Counters (BBCs) will be installed symmetrically aside from the interaction point in the end-cups of SPD setup and will serve as a tool for beam diagnostics including local polarimetry. The outer part of the BBC...
A prototype of a track scintillation detector has been developed. The detector is necessary to obtain two-dimensional spatial information about the processes under study. The detector is based on a monolithic cubic scintillator, viewed from different sides by a highly sensitive Sensls SiPM matrix. The report describes a technique for obtaining an image of a track of a passing particle through...
The measurement of transverse single asymmetries (AN) contributes to the better understanding of the nucleon structure. Significant AN values in forward rapidities were obtained in previous experiments, contrary to the pQCD expectations. Different mechanisms to explain such sizeable asymmetries have been proposed and are still under discussion. An analysis based on Monte Carlo simulations of...
The current consensus cosmological model, LCDM, is for the most part in good agreement with observations. However, not all is well: as our measurements of both early and modern Universe are becoming more and more precise, a gap opens between different indirect measurements of the Hubble constant, i.e. the rate at which the Universe is expanding today. Many attempts to cross this gap have been...
Within the framework of quantum electrodynamics, the interaction of particles can be described using invariant perturbation theory. Higher orders of perturbation theory are expressed in terms of loop integrals. The modern approach to calculating loop integrals is to use the Integration-By-Parts method. This method allows you to express loop integrals through the so-called master integrals. One...
Развитая инфраструктура и наличие пучков тяжелых ионов нужных энергий способствовало Ускорительному комплексу NICA (ЛФВЭ ОИЯИ г. Дубна МО) стать уникальным местом для проведения международного физического эксперимента SRC – измерения короткодействующих двухнуклонных корреляций в обратной кинематике. Проведение эксперимента невозможно без жидководородной (протонной) мишени. В статье приводятся...
