bluuebunny/crossref_metadata_2025_split huggingface dataset:
Magnetic and dielectric properties of composites based on magnetic microspheres
Authors: Vyzulin S A , Buz’ko V Y , Kalikintseva D A , Goryachko A I , Sarin L I , Kolantsov O A , Syr’ev N E 
Published: November 2019

Abstract
Composites with a filler based on a magnetic material ECOM-P and paraffin were investigated. The microstructure of the magnetic material was studied, the average particle size was determined. The influence of the concentration of magnetic filler on the scattering characteristics of electromagnetic waves in the frequency range from 15 MHz to 7 GHz is determined. The values of permittivity and permeability at frequencies of 1, 2 and 3 GHz are calculated.
Selection of rotating entrance window and target parameters for a gas-filled separator operating at high intensive heavy ion beams
Authors: Ibadullayev D 
Published: November 2019

Abstract
The durability of the targets and entrance window foils of the Dubna gas-filled recoil separator working at high intensive heavy ion beams was considered. The temperature, as a factor determining their durability, was calculated as a function of time in the conditions of their pulsed heating by heavy ion beam, followed by radiative cooling by radiation emitted from their surfaces. The temperatures were calculated for 48Ca heavy ion beam with intensity expected for the DC-280 accelerator. With the temperature calculated as a function of time, optimal parameters of the entrance window and target operation were chosen.
Prospects for the study of the strangeness and hypernuclei production at NICA/MPD
Authors: Zinchenko A , Kolesnikov V , Mudrokh A , Vasendina V , Voronyuk V 
Published: November 2019

Abstract
The prospects for the study of the strangeness and hypenuclei production with the MultiPurpose Detector (MPD) at NICA are presented and the detector performance for such physics analyses, evaluated from the Monte Carlo simulation, are demonstrated.
Exploring hot QCD matter via direct photons at ALICE
Authors: Peresunko D. 
Published: November 2019

Abstract
We review ALICE results on direct photon production in pp, pA and AA collisions and compare them to predictions of NLO pQCD calculations, hydrodynamic, and transport models. In pp and pA collisions the measured direct photon yield is consistent with NLO pQCD calculations, scaled with the number of binary collisions. In Pb-Pb collisions an additional direct photon contribution is observed at low pT
< 4 GeV/c which can be interpreted as a thermal direct photon contribution. The measured yield is larger than predictions of hydrodynamic models, but still consistent with them within uncertainties. The elliptic collective flow of direct photons was measured in central and mid-central Pb–Pb collisions and compared with hydrodynamic model predictions.
Doubly heavy baryons from the theoretical point of view
Authors: Berezhnoy A V , Likhoded A K , Luchinsky A V 
Published: November 2019

Abstract
The theoretical analysis of production, lifetime, and decays of doubly heavy baryons is presented. The lifetime of

Ξ

c
c

+
+

baryon recently measured by the LHCb Collaboration is used to estimate the lifetimes of other doubly heavy baryons. The production and the possibility of observation of Ξ
bc
baryon at LHC are discussed.
Exotic hadrons in the decays of vector bottomonia
Authors: Baru V , Filin A , Hanhart C , Nefediev A , Wang Q 
Published: November 2019

Abstract
Line shapes of the Zb
(10610) and Zb
(10650) bottomonium-like exotic states produced in the decays of the vector bottomonium ϒ(10860) are analysed. A combined analysis of the existing experimental data in the elastic and inelastic decay channels of the ϒ(10860) is performed within a nonperturbative coupled-channel approach which complies with the requirements of unitarity and analyticity of the multichannel amplitude. The nature of the Zb
states is revealed and the parameters of the interaction are extracted from the fit to the data.
Observation of the Higgs decay to beauty quarks
Authors: Noguchi Yohei 
Published: November 2019

Abstract
Higgs bosons decaying to b-quark pairs were searched in the production associated with vector bosons using 79.8 fb−1 data of pp collisions at the center of mass energy of 13 TeV provided by the Large Hadron Collider and recorded by the ATLAS detector. The observed (expected) significance of the signal is 4.9 (4.3) σ. This result was combined with the

H
→
b

b
¯

results of Run 1 and Run 2 datasets for vector boson fusion production and associated production with top quark pairs. A combination with H → γγ and 4ℓ decay modes in associated production with vector bosons was performed using the Run 2 results. The observed (expected) significance of this production modes is 5.3 (4.8) σ.
The background simulation of experiment for searching of 2v2K capture in 124Xe
Authors: Kazalov V V , Gangapshev A M , Gavrilyuk Yu M , Kuzminov V V , Panasenko S I , Petrenko O D , Ratkevich S S , Tekueva D A 
Published: November 2019

Abstract
We describe the Monte Carlo (MC) simulation package of the “2K-CAPTURE” setup and discuss the agreement of its output with data. The “2K-CAPTURE” MC simulates the energy loss of particles in detector and components of the passive shield and generates the resulting response in working volume large proportional counter (LPC). The simulation accounts for absorption, reemission, and scattering of both photons and neutrons and tracks them until they either are absorbed. The algorithm proceeds with a detailed simulation of the electronics chain. The MC is tuned using data collected with radioactive calibration source deployed in the internal channel of the installation. The simulation reproduces the energy response of the detector corresponding to distribution of the generated pointwise clusters of a charge of primary ionization in LPC.
Statistical data analysis in the DANSS experiment
Authors: Skrobova Nataliya 
Published: November 2019

Abstract
DANSS is a one cubic meter highly segmented solid scintillator detector. It is placed under a 3.1 GW industrial reactor at the Kalinin NPP (Russia) on a movable platform. The distance from the reactor core center is varied from 10.7 m to 12.7 m on-line. The inverse beta decay (IBD) process is used to detect antineutrinos. DANSS detects about 5000 IBD events per day.Sterile neutrinos are searched for assuming a 4 neutrino model (3 active and 1 sterile neutrino). The exclusion area in the sterile neutrino parameter plane is obtained using a ratio of positron energy spectra collected at different distances. Therefore, results do not depend on the shape and normalization of the reactor

v
˜

e

spectrum, as well as on the detector efficiency. The excluded area covers a wide range of the sterile neutrino parameters up to sin2 2θ
14 < 0.01 in the most sensitive region. The Reactor Antineutrino Anomaly optimum point is excluded with a confidence level higher than 5σ. A Gaussian CL
s
method was used to obtain exclusion areas. CL
s
method includes a point from sin2 2θ, Δm
2 plane into exclusion area only if the experiment sensitivity to such point is good. Details of this approach are presented.
The DAMPE experiment and its latest results
Authors: Fusco Piergiorgio 
Published: November 2019

Abstract
The DArk Matter Particle Explorer (DAMPE) is a high-performance space particle detector launched in orbit on 17 December 2015 by a collaboration of Chinese, Italian and Swiss scientific institutions, coordinated by the Chinese Academy of Sciences. It consists of a high-resolution segmented BGO electromagnetic calorimeter with a depth of 32 radiation lengths, a silicon-tungsten tracker-converter that reaches an angular resolution below 0.2°, an anti-coincidence shield and ion detector made of segmented plastic scintillators and a neutron detector made of boron-doped plastic scintillators. An overview of the experiment and a summary of the latest results coming from the observation of cosmic rays up to 100 TeV, of gamma-rays up to 10 TeV and of cosmic electrons up to 5 TeV is presented.
Hyperfine structure of S-states in muonic ions of lithium, beryllium and boron
Authors: Dorokhov A E , Martynenko A P , Martynenko F A , Sukhorukova O S 
Published: November 2019

Abstract
On the basis of quasipotential method in quantum electrodynamics we make precise calculation of hyperfine structure of S-states in muonic ions of lithium, beryllium and boron. Nuclear structure and recoil corrections of orders α
1 and α
6, vacuum polarization corrections in first and second orders of perturbation theory are taken into account. Total values of hyperfine splittings are obtained which can be used for a comparison with future experimental data.
Studies of the Electromagnetic Calorimeter with projective geometry for the MPD/NICA
Authors: Dabrowska B. , Krechetov Yu. , Kulikov V. , Martemianov M. , Tyapkin I. , Zinchenko A. 
Published: November 2019

Abstract
A projective geometry description of the MPD Electromagnetic Calorimeter (ECal) has been developed and implemented within the MpdRoot software framework. Using this package, characteristics of the detector were studied by Monte Carlo methods. Information about energy and spatial resolution as well as registration efficiency was obtained for different clustering procedures. One module of the detector, developed at JINR, was tested using electron beam at DESY. Energy scan for this prototype was carried out to estimate detector linearity. Results of the simulations and beam tests are presented.

A post-publication change was made to this article on 16 Mar 2020 to correct an author name and add a funding acknowledgement.
The Silicon Tracking System of the CBM Experiment at FAIR
Authors: Lavrik E 
Published: November 2019

Abstract
The Compressed Baryonic Matter (CBM) experiment at the future Facility for Antiproton and Ion Research (FAIR) aims to study the properties of nuclear matter at high net-baryon densities and moderate temperatures.
The Silicon Tracking System (STS) is the key detector to reconstruct with a high efficiency up to 1000 charged particle trajectories created in heavy-ion collisions at interaction rates of up to 10 MHz. It will determine the momentum of the particles with a momentum resolution Δp/p ≈ 1-2% which requires ultra-low detector material budget of 0.3-1% X0 per layer. The detector comprise eight layers of double-sided silicon micro-strip sensors and will be placed inside the 1 Tm superconducting magnet which limits the space available, which in turn requires advanced cooling approaches and mechanical design with precise tracking layers alignment. The micro-strip sensors have to be radiation hard and checked for their quality optically and electrically before the assembly.
This contribution gives an overview of the STS and presents the status of its component quality control and assembly procedures.
Track based alignment procedure for the CBM silicon tracking detector
Authors: Das Susovan , Schmidt Hans Rudolf 
Published: November 2019

Abstract
The CBM (Compressed Baryonic Matter) experiment at FAIR is being designed for the study of the QCD phase diagram in the region of the high baryon chemical potential at relatively moderate temperatures. The Silicon Tracking System (STS) is the central detector for momentum reconstruction of the produced charged particles in the CBM experiment. It consists of 8 layers of altogether ∼ 900 double sided silicon micro strip sensors. Limited mechanical precision(> 100μm) during the mounting, temperature differences during the experiment, influence of the applied magnetic field result in misalignment to the detector component positions. Therefore, the intrinsic spatial resolution(∼ 20μm) of the detector components has to be recovered by a track based alignment method. In this conference paper, the current status of implementation of the alignment algorithm is presented. For this work, the GBL (General broken line) track refit model is employed to create the necessary input data structure to provide the input to the standalone PEDE part of the χ2 minimization based MILLEPEDE II alignment algorithm.
Development of Transition Radiation Detectors for hadron identification at TeV energy scale
Authors: Belyaev N , Cherry M L , Dachs F , Doronin S A , Filippov K , Fusco P , Gargano F , Konovalov S , Loparco F , Mascagna V , Mazziotta M N , Ponomarenko D , Prest M , Pyatiizbyantseva D , Rembser C , Romaniouk A , Savchenko A A , Schioppa E J , Sergeeva D Yu , Shulga E , Smirnov S , Smirnov Yu , Soldani M , Spinelli P , Strikhanov M , Teterin P , Tikhomirov V , Tishchenko A A , Vallazza E , Vorobev K , Zhukov K 
Published: November 2019

Abstract
Many modern and future accelerator and cosmic ray experiments require identification of particles with Lorentz γ-factor up to 104 and above. The only technique which reaches this range of Lorentz factors is based on the transition radiation detectors (TRD). This paper describes the development of a TRD based on straw proportional tubes. A prototype of such kind of detector was built and tested at the CERN SPS accelerator. Monte Carlo simulation model of the detector which matches well the experimental data was developed. This program was used for the simulation of a full-scale TRD for hadron identification at TeV energy scale.
A quasi-monochromatic electron beam of the accelerator “Pakhra” for calibration of detectors
Authors: Alekseev V I , Baskov V A , Dronov V A , L’vov A I , Koltsov A V , Krechetov Yu F , Malinovsky E I , Pavlyuchenko L N , Polyanskiy V V , Sidorin S S 
Published: November 2019

Abstract
Characteristics of the calibration quasi-monochromatic beam of secondary electrons of the accelerator “Pakhra” of the P N Lebedev Physical Institute of the Russian Academy of Sciences based on the magnet SP-57 are presented. The energy resolution of the beam from a copper converter in the thickness range of 0.1-5 mm and the interpolar gap in the magnet 6 cm amounted to δ = 10−4.5 % in the energy range of the electron beam E = 98−294 MeV, respectively.
Investigations of SiPM based large scintillation detectors
Authors: Runtso M F , Arkhangelskaja I V , Arkhangelskiy A I , Chasovikov E N , Galper A M , Egorov A E , Leonov A A , Naumov P Yu , Naumov P P , Suchkov S I , Yurkin Y T , Topchiev N P 
Published: November 2019

Abstract
Different types of light concentration for large fast scintillation detectors with silicon photomutipliers as photosensors for the satellite based gamma-ray telescope GAMMA- 400 are analysed. Some proposals for their possible implementations are made.
The dynamics of ionization waves formation in a transverse nanosecond plasma-beam discharge with a slotted cathode in argon
Authors: Ashurbekov N A , Iminov K O , Zakaryaeva M Z , Ramazanov A R , Shakhsinov G Sh 
Published: November 2019

Abstract
The article presents the results of an experimental study and numerical simulation of the spatio-temporal dynamics of ionisation processes in the gap between the electrodes and inside the cathode cavity during the formation of a nanosecond discharge in argon at pressures in the chamber from 1 to 10 Torr. The correspondence between the density distribution of charged particles and the optical patterns of the discharge is established. A numerical simulation of the formation of a limited discharge in argon under various external conditions is constructed that accounts for the influence of the charge deposited on the surface of the dielectric wall, the coefficient of secondary emission of electrons from the cathode surface and the effect of the space charge on the distribution of electric potential between the electrodes. The role of the surface charge deposited on the dielectric walls in the formation of the spatial structure of the discharge is determined. The results of numerical simulation are compared with experimental data. It is shown that the electron concentration in a discharge limited by dielectric walls is an order of magnitude higher than in an unlimited discharge under the same external conditions. The general patterns of formation and development of a limited discharge in argon are discussed and the main physical processes affecting the dynamics of development and the spatial structure of the discharge are established.
Investigation of the dynamics of expansion of the near-surface light erosion plasma formed during the evaporation of a material by broadband high-brightness radiation
Authors: Pavlov A V , Protasov Yu Yu , Telekh V D , Shchepanuk T S 
Published: November 2019

Abstract
The dynamics of the vapor-plasma flows formed at impact of erosion type magnetoplasma compressor (MPC) discharge radiation on Ti, Al and PTFE targets with use of methods of a holographic interferometry and schlieren photos (Toepler’s scheme in the light field mode) is investigated. In the schlieren and interferogram photos, zones characteristic of the studied process of radiation interaction with matter are well visible: the gas-dynamic evaporation mode is realized (plasma piston mode), there is a shock wave in the gas, the contact boundary between the shock-compressed gas and the vapor plasma. The interferograms analysis indicates that the regime of developed evaporation is preceded by a regime of diffusion evaporation. On the interferograms above the targets at different distances from the radiation source (from the MPC), we observe 3 types of gas-dynamic perturbations: an acoustic wave, a simple wave (Riemann wave), and a shock wave. Qualitative and quantitative description of processes in these zones is discussed in the report. The effect of the radiation spectral composition (we use the method of gas spectral selection), the targets materials, and the degree of surface treatment on the evaporation is shown experimentally.
Computer simulation of high current vacuum arc with developed anode spot
Authors: Shmelev D L , Uimanov I V 
Published: November 2019

Abstract
A self-consistent simulation of anode heating by 4.5 kA vacuum arc during the half-wave of 50 Hz current with 1 m/s contact opening was carried out. The calculations were done in the framework of hybrid high current vacuum arc model, which treats ions and atoms as macroparticles with the help of particle-in-cell methods, but electron subsystem is treated as massless fluid with quasineutrality assumed. The occurrence of an anode plasma plume (similar to that found in experiments) was obtained as a result of modeling. It is shown that the energy flux of line radiation from the interelectrode plasma to the anode is a critical reason of the appearance and maintenance of the anode plume.
On possible reasons of positive near-anode voltage drop in high-current vacuum arc
Authors: Shmelev D L , Barengolts S A , Tsventoukh M M , Uimanov I V , Wang L 
Published: November 2019

Abstract
In this paper we consider some reasons for the occurrence of a positive near-anode potential drop during current constriction in high-current vacuum arc. It is shown that if the radius of constriction is much larger than the electron mean free path, then a positive voltage drop in the near-anode plasma sheath does not occur, but an additional drop may occur in the near-anode plasma layer due to the anomalous resistance. If the current constriction radius is much less than the electron mean free path, then a positive voltage drop in the sheath arises under the usual condition, and the kinetic instabilities in the near-anode plasma do not develop.
Plasma source based on ring-shaped anode layer thruster for a bipolar electron-optical system
Authors: Bugaev A S , Goncharov A A , Gushenets V I , Oks E M 
Published: November 2019

Abstract
The conceptual design of pulsed plasma source for plasma-optic application and materials modification are investigated. The source is based on plasma thruster’s technology, that were developed by Goncharov’s group in Institute of Physics (Kiev, Ukraine). The plasma device with its two modified closed-drift anode layer thrusters can operate in low-current high-voltage mode and in high-current plasma mode. Most attention in the paper is focused on the latter mode being similar to a glow discharge with a positive column. The study shows that under certain conditions, the discharge with closed electron drift can be accompanied by non-self-sustained hollow-cathode discharges with oscillating electrons which greatly decrease the auxiliary discharge voltage. Presented in the paper the current–voltage characteristics of this type of high-current discharge and the spatial distributions of plasma parameters are measured in the discharge region with double Langmuir probe techniques. The maximum plasma densities on the central cathode axis are (6.5÷6.8)×1012 cm–3.
Computer simulation of ion beam-plasma interaction
Authors: Dudnikova G I , Boronina M A , Genrikh E A , Vshivkov V A 
Published: November 2019

Abstract
In the paper a two-dimensional axisymmetric hybrid numerical model of the interaction of an ion beam with a plasma is presented. The model is based on the kinetic approximation for the ions whereas the electrons are assumed to be a fluid. To solve the Vlasov kinetic equation, the author’s modification of the particle in cells method (PIC) is used. It was shown that the magnetic flux can be expelled from the volume filled by the plasma due to the plasma-beam interaction. The dynamics of the magnetic field cavity formation depending on the characteristics of the ion beam and the background plasma is investigated.
Calculation model of the plasma load matching with the current sources based on explosive magnetic generator
Authors: Shurupov M A , Mashtakov A V , Gusev A N , Zavalova V E , Kozlov A V , Shurupova N P 
Published: November 2019

Abstract
In this paper, we consider the model of engineering calculation for the matching of the explosive-magnetic generators (EMG) and pulsed plasma accelerator (PPA) at amplitudes of currents reaching 2.5 MA. The main features of the model are taking into account the dynamics of change in the inductance of PPA and the using of the concentrated mass approximation for the current shell. The taken assumptions were checked by experimental data on real PPA powered by EMG. It is shown that the built model has sufficient accuracy for preliminary calculations for design and installation of such technique.
A new type of non-thermal atmospheric pressure plasma source
Authors: Tikhonov V N , Ivanov I A , Tikhonov A V 
Published: November 2019

Abstract
The unique applications of Non-Thermal Atmospheric pressure Plasmas (NTAP) are associated with its enormous potential for providing technological capabilities for new products and technologies. In such plasmas, most of the electrical energy is deposited in the electron component of the plasma, while plasma ions and neutral components remain at or near room temperature. This paper presents the NTAP source that combines the characteristics of a dielectric barrier discharge (DBD) by discharge configuration and a non-thermal plasma jet (NTPJ) by plasma jet formation.