Physics of Particles and Nuclei Letters This is an RSS file. You can use it to subscribe to this data in your favourite RSS reader or to display this data on your own website or blog.

Stabilizing Na0.7MnO2 Cathode for Na-Ion Battery via Surface Coating
AbstractIn our work, we synthesized a series of P2-Na0.7MnO2 (NMO) and P2-Na0.7Ni0.33Mn0.67O2 (NNMO) cathode materials by sintering from precursor powders at a temperature of 900 °C in a stationary or in a flowing air atmosphere. By means of X-ray diffraction analysis it was shown that the material resulting composition strongly depends on the annealing conditions. During the synthesis in a stationary atmosphere, P2-contained samples of mixed sodium–nickel–cobalt oxide were obtained. At the same time, the structural disordering observed in the NMO material disappeared after the NMO coating with an admixture of sodium-...
Source: Physics of Particles and Nuclei Letters - October 1, 2022 Category: Physics Source Type: research

GID-160: A Pulsed Generator for Supplying Power to Magnetic Elements of Accelerators
AbstractThe development of the GID-160 module, a pulsed power source for magnetic elements of the accelerator, is described. This module is designed as the flyback charger of a high-voltage capacitor, which is connected to the magnet by a thyristor switch and consumes constant power in the process of charging. The device enables the charging of a capacitor up to 1 kV with an accuracy of up to 0.01%. GID-160 has both a digital and a built-in analog control interface. Many such modules are currently in operation at LIU-20, NICA, and VEPP-2000M accelerators. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - October 1, 2022 Category: Physics Source Type: research

RF Power Feeding of Hybrid Electron Linac with Standing and Traveling Wave Sections
AbstractThis paper considers power supply issues arising in hybrid accelerating structures containing both standing and traveling wave sections in operation and power filling regimes and provides recommendations on power feeding design. Calculations of the 10 MeV electron linac efficiency in wide beam current range are presented. Magnetron stability issues are discussed. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - October 1, 2022 Category: Physics Source Type: research

Study of Material Budget of the MPD Detectors
AbstractThe Multi-Purpose Detector (MPD) is the main experiment at the NICA collider in Dubna. The construction of MPD consists of many detectors and components. The variety of materials in construction and the nested design leads to the impact of inner MPD detectors to the work of outer ones and studies of their material budgets are very important. In this work the study of material budget of the Electromagnetic Calorimeter (ECal), Forward Hadron Calorimeter (FHCal) and Time-Projection Chamber (TPC) for MPD experiment is presented in details. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - October 1, 2022 Category: Physics Source Type: research

Coordinate Detectors for High Rates Based on a Multiwire Electronic Multiplier
AbstractResults of an electrical field simulation for various configurations of new 2D position-sensitive detectors based on the gas-filled multiwire electron multiplier (MWEM) are presented. In contrast to the multiwire proportional chambers (MWPCs), an avalanche multiplication of the primary charge in the MWEM occurs in between wires1, and high loading capability and counting rates with submillimeter spatial resolution can be achieved in this case. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Structural Studies of a Bronze Zoomorphic Pommel from the Pekunovsky Settlement Using Neutron Diffraction and Tomography Methods
AbstractNondestructive structural methods of neutron diffraction and neutron tomography have been used to study he phase composition and spatial distribution of chemical components in the bulk of a bronze zoomorphic bear-shaped pommel. The pommel, which belongs to the Ananyino cultural and historical region dated 1st millennium BCE, was found close to the Pekunovsky settlement near Dubna, Moscow oblast. Studies have shown that the zoomorphic ornamentation, which was made of tin bronze, contains two main crystalline phases: bronze and cuprite Cu2O. The reconstructed neutron tomographic data revealed the uneven distribution ...
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Lagrangian Geometry of Algebraic Manifolds
AbstractEach algebraic manifold can be considered a symplectic manifold equipped with a Hodge-type K ähler form. It is therefore natural to study the Lagrangian geometry of an arbitrary algebraic manifold. Two constructs applicable to a fairly broad family of algebraic manifolds are presented. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Excitation of the W-band Structure of Cavities by the Charged Particle Train
AbstractThe development of the millimeter wavelength structure of cavities is underway at the Budker Institute of Nuclear Physics. The initial interest in such structures is caused by the possibility of obtaining a higher accelerating gradient due to the breakdown limit increase at a higher operating frequency domain. The W ‑band structures can also be used for charged particle bunch production for experiments with plasma wakefield acceleration. An analysis of cavity structure excitation by the single bunch was given in our previous studies, as well as a comparison of it with excitation simulations. This paper presen ts ...
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Time Characteristics of the Scintillation Counter of the Luminosity Measurement Detector at NICA
AbstractThis paper presents the results of a study of the time resolution of the scintillation elements of a detector designed to measure the absolute luminosity at the interaction points at the MPD experiment at NICA, Joint Institute for Nuclear Research (JINR) [1]. The measurements are carried out using cosmic rays. The correspondence of time resolution to the problems of measuring luminosity is discussed here. It is shown that the time resolution is consistent with the concept of the detector and ensures the measurement of the absolute luminosity, as well as the study of the beam longitudinal profile. (Source: Physics o...
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

The Contour Gauge in Use: Telling Untold
AbstractIn quantum field theory, we discuss the main features of the (non-local) contour gauge which extends the local axial-type gauge used in most approaches. Based on the gluon geometry, we demonstrate that the contour gauge does not suffer from the residual gauge. We discuss the useful correspondence between the contour gauge conception and the Hamiltonian (Lagrangian) formalism. Having compared the local and non-local gauges, we again advocate the advantage of the contour gauge use. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

A New Station for Measuring Undulator and Laser Radiation Parameters of the 3rd Laser of the Novosibirsk Free Electron Laser
AbstractThis paper describes stations, both existing and under development, for the diagnostics of beam parameters of the 3rd stage of the Novosibirsk free electron laser (FEL). A modification of the method for measuring electron energy spread using the spectrum of spontaneous undulator radiation under the operating conditions of the Novosibirsk FEL is presented. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Mathematical Model of a Radiation-Induced Neurogenesis Impairment
AbstractModels of radiation-induced neurogenesis disorders are based on a consideration of the age-related dynamics of the changes in the number of progenitor cells during life. However, for a full-fledged analysis of radiation injuries, it is also necessary to know the age-related dynamics of mature cell types —neurons, astrocytes, and oligodendrocytes formed from the corresponding progenitor cells. To account for the population of both progenitor cells and mature cell types, we have developed a mathematical model of the radiation-induced impairment of adult neurogenesis based on a model of asymmetric d ivision of neura...
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Study of Photonuclear Reactions in 165Ho Nucleus at the LINAC-200 Accelerator
AbstractThe cross sections for the reactions165Ho( γ, n)164Ho,165Ho( γ, 3n)162mHo,165Ho( γ, 4n)161Ho,165Ho( γ, 5n)160m1Ho,165Ho( γ, 5n)160Ho, and165Ho( γ, 6n)159Ho were experimentally determined in the energy range from 50 to 110 MeV. Also, calculations were performed using the Geant4 code and the Talys program to determine the cross section of reactions in holmium samples. Calculation results are compared with the obtained experimental results. The dependence of the isomeric ratio160m1Ho/160Ho on the electron energy has been measured. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Optimization of Monte Carlo Integration for Estimating of the Pion Damping Width
AbstractThis work presents algorithm and methods for numerical calculation of multidimensional collision integrals based on the Monte Carlo method. The source code was used for the calculation of the pion damping width in hot nuclear matter taking all possible pion-pion scattering modes into account. For optimization of the computation the parallel calculation algorithm is implemented in C++ programming language using OpenMP and NVIDIA CUDA technology. Calculations are performed on nodes with multicore CPUs and Intel Xeon Phi coprocessors and Nvidia Tesla K40 accelerator installed within heterogeneous cluster of the Labora...
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research

Can Our Spacetime Emerge from Anti –de Sitter Space?
We present a model showing that our four-dimensional spacetime with the signature\(( + , - , - , - )\) and almost vanishing positive curvature may have originated from a\(b\)-ary tree-like branching of a single discrete entity, and the\(Ad{{S}_{5}}\) space related to this branching process. (Source: Physics of Particles and Nuclei Letters)
Source: Physics of Particles and Nuclei Letters - July 26, 2022 Category: Physics Source Type: research