Description
https://zoom.us/j/99728499380
The high-granularity electromagnetic calorimeter (ECal) of the Multi-Purpose Detector (MPD) at heavy-ion NICA collider is designed to measure precisely the spatial position and energy of photons and electrons in the case of high density of the secondary particles from heavy-ion collisions. These requirements can be achieved by a high segmentation of the calorimeter within projective geometry. ...
The large barrel-shaped, shashlyk-type electromagnetic calorimeter (ECal) is an important part of the Multi-Purpose Detector (MPD) of the heavy-ion NICA experiment, and is designed to provide spatial and energy measurements for photons and electrons in the energy range from 40 MeV to 2-3 GeV. To deal with the high multiplicity, the ECal is finely segmented and made up of 38,400 cells...
Sampling calorimeters of the "shashlyk" type are widely used in high-energy physics due to the low cost of construction materials and good energy resolution. Using this technology, within the framework of the NICA / MPD project, a cylindrical electromagnetic calorimeter (ECAL) with a diameter of 4 m and a length of 6 m is being created. It contains 38400 towers of the "shashlyk" type with a...
The main purpose of the forward hadron calorimeter (Projectile Spectator Detector PSD) in the NA61/SHINE experiment is to provide an experimental measurement of a heavy-ion collision centrality and orientation of its reaction plane. Precise event-by-event estimate of these basic observables is crucial for many physics phenomena studies to be performed by the NA61 Collaboration. The PSD is a...
PHOS is a highly granulated precision spectrometer, one of the two
electromagnetic calorimeters of ALICE (A Large Ion Collider Experiment)
at the LHC. It is based on scintillating PbWO4 crystals and is
dedicated to the precise measurements of spectra, collective flow and
correlations of thermal and prompt direct photons, and of neutral mesons
in ultra-relativistic nuclear collisions at LHC...
TileCal, the central hadronic calorimeter of the ATLAS detector is a key system to measure and reconstruct hadrons, jets, hadronic decays from tau leptons and missing transverse energy, also participating in muon identification. TileCal is a sampling calorimeter composed of plastic scintillators interleaved by iron plates. Wavelength shifting optical fibres collect the scintillating light from...
The Tile Calorimeter (TileCal) is the hadronic calorimeter covering the central region of the ATLAS experiment. It is a sampling calorimeter with steel as absorber and scintillators as active medium. The scintillators are read-out by wavelength shifting fibers coupled to photomultiplier tubes (PMTs). The TileCal response and its readout electronics are monitored to better than 1% using...
The upgrade of the ATLAS hadronic tile-calorimeter (TileCAL) Low-Voltage Power Supply (LVPS) falls under the high-luminosity LHC upgrade. This upgrade is composed of multiple projects that when combined will form the latest iteration of the LVPS. One such project is focused on an LVPS component known as a brick, which is a transformer coupled to a buck converter. These bricks function is to...
The foreseen upgrade of the Large Hadron Collider (LHC) will lead to an increase of its luminosity up to $5$-$7 \times 10^{34} \, cm^{-2}s^{-1}$, five times more than the original design value. The CMS muon system must be able to sustain a physics program after the increase of luminosity and maintain sensitivity for electroweak physics for TeV scale searches achieved during Run 2. To cope with...
The Phase-2 Upgrade of the CMS experiment is designed to prepare its detectors for operation at the High Luminosity Large Hadron Collider (HL-LHC). The upgraded collider will begin operation in 2027, featuring new challenging conditions in terms of data throughput, pile-up and radiation, reasons for which the tracker detector will be entirely replaced by a new design. We present the current...
The Muon Drift Tube (MDT) chambers provide very precise and reliable muon tracking and momentum measurement in the ATLAS muon spectrometer. Already in Run 2 of the LHC they have to cope with very high background counting rates up to 500 $Hz/cm^2$ in the inner endcap layers. At High-Luminosity LHC (HL-LHC), the background rates are expected to increase by almost a factor of 10. New small (15...
The results of the study of a large-size, multilayer Micromegas detector with X-ray source Cd-109 are discussed. The detector consists of 4 layers, each of them is a Micromegas detector with resistive anode and strip-based read-out structure. The gas volume of the chamber is splitted to 4 parts interconnected in 6 points. Results of the measurements of the gas gain curves and the 1st Townsend...
New developments of pixel detectors based on GaAs sensors offer effective registration of the Transition radiation X-rays and perfom simultanious measurements of thier energies and the emission angles. This unique feature opens new possibilities for particle identification on the basis of maximum available information about generated TR photons. Results of studies of TR energy-angular...
Studying of hadron production in forward direction at the LHC energy has
a great interest both for understanding of the fundamental QCD processes
and also in applied areas such as the description of
ultra-high energy cosmic particle interactions.
Since the energies of secondary hadrons in such studies almost reaches
the maximum energy available at the LHC of $\sim$6 TeV, the most effective...
Hybrid pixel semiconductor detectors find more and more applications in modern experimental setups. In particular, pixelated detectors based on GaAs:Cr sensor and Timepix3 chip are used in R&D for a state-of-the-art Transition Radiation Detector prototype at CERN. Motivation and usage aspects for GaAs:Cr-Timepix3 device in the experiment are covered in the talk. Author’s contribution to the...
Nowadays the silicon detectors are playing a significant role in the experimental studies of the nuclear matter properties. Using ultra-thin silicon pixel detectors for high-precision identification of charged particles it should be possible to investigate the new properties of nuclear matter arising in relativistic nuclear collisions. To provide stable operational conditions of such...
The Beam-Beam Counter is a system for local polarimetry and local luminosity monitoring at the Spin Physics Detector at NICA. The main option of the Beam- Beam Counter for SPD at NICA is the scintillation counters with SiPM readout. The work presents the first results on scintillation detector prototype using developed Front-end electronics (FEE) based on the Time-over-Threshold (ToT)...
The increase of transverse segmentation is a trend in developments of modern calorimeter systems based on different technologies. The scintillator calorimeters assembled from SiPM-on-tile elements are now under development for future experiments at both lepton and hadron colliders. The study presents a validation of simulation of the response of a single SiPM-on-tile element. The experimental...
During the upcoming Run 3 and Run 4 at the LHC the upgraded ALICE (A Large Ion Collider Experiment) will operate at a significantly increased luminosity and bunch crossing and will collect two orders of magnitude more events than in Run 1 and Run 2. A part of the ALICE upgrade is the new Fast Interaction Trigger (FIT) [1]. This thoroughly redesigned detector combines, in one system, the...
The new Fast Interaction Trigger (FIT) detector, composed of Cherenkov and scintillation subsystems, will serve as the main luminometer and trigger detector of the upgraded ALICE experiment at CERN during the LHC Run 3 and 4. It will also measure the precise collision time, multiplicity, centrality and reaction plane. FIT Cherenkov subsystem, intended mainly for the precise timing...
For the new upcoming era of LHC with higher energies and a more complex structure of the beam (HL-LHC) measurements of luminosity are required to be exceedingly accurate. A new device is being developed for CMS experiment to fulfill such demands as stand-alone, robust and precise. The design, main components and physics behind the new quartz fiber based luminometer (QFL) are described....
The fundamental difference between low-background nuclear-physical measurements and other types of studies of the characteristics of ionizing radiation sources is the extremely low total event count rate. Therefore, all recording devices in such experiments are oriented to work with individual signals. Spectrometric measurements of low-energy ionizing radiation using gas detectors are mainly...
Investigation of the semiconductor detectors properties under neutron irradiation is very important for their practical application. High-resistivity gallium arsenide detectors (GaAs:Cr) were irradiated at the reactor IBR-2 with various fast neutron fluences in range from 4×1011 см-2 to 5×1017 cm-2. The charge collection efficiency and the current-voltage characteristics of irradiated...
The planned final upgrade of the LHC accelerator at CERN, namely the high luminosity phase of the LHC (HL-LHC), foreseen beyond 2026, will mean unprecedented radiation levels, Due to the radiation damage limitations of the silicon sensors presently used, new radiation-hard tracking
detectors will be required by the physics experiments.
3D silicon pixel detectors are among the radiation-hard...
Over 30 years there has been no comprehensive understanding of the mechanism of soft photons formation (energy smaller 50 MeV). Experimental data indicate an excess of their yield in hadron and nuclear interactions in comparison with calculations performed in QED. In JINR, in connection with the building of a new accelerator complex NICA, it has become possible to carry out such studies in pp,...
The SPASCHARM experiment is ready to study spin effects in inclusive production of various particles on polarized target. Comissioning and first data taking run demonstrated that the SPASCHARM setup is ready to measure single spin asymmetry in the fragmentation region of the unpolarized 28 GeV pion beam. We studied the feasibility to measure single spin asymmetry in the reaction π^- p^↑→K_s^0...
The NA61/SHINE collaboration accomplished the originally proposed program
of data taking at the end of 2018. The new 2020+ research plan will be presented.
It includes:
- the new upgraded experimental setup;
- the open-charm production in Pb+Pb collisions which has never been measured at such low energies;
- improved hadron production measurements for current and future Long-Baseline...
Tokai-to-Kamioka (T2K) experiment is a long baseline neutrino experiment in Japan. T2K started data taking in 2010 and obtained a hint on matter-antimatter asymmetry in neutrino oscillations. To provide better sensitivity, T2K plans to have a run extension with higher intensity beam and an upgrade of the T2K near detector. We adopted a novel detector called SuperFGD as an upgraded fully-active...
A new method for studying the hadron component of EAS was recently developed. This method is based on registration of thermal neutrons that are generated as a result of interactions of shower hadrons with atomic nuclei in the atmosphere and the environment. The PRISMA-32 and URAN arrays were created at the Unique Scientific Facility NEVOD (MEPhI) to register the neutron component of EAS...
In recent years, many scientific groups working with Cherenkov water neutrino telescopes (IceCube, KM3NeT) began the development of new generation of optical modules (OM). As a rule, these are modules based on a large number of PMTs in quasispherical configuration which allows getting the response practically independent on Cherenkov light direction. In this regard, it becomes necessary to...
Gamma imaging is a technique based on the position reconstruction of gamma-ray radioactive sources. It is widely studied in the field of nuclear physics and has several applications in other fields, such as in medical physics and in oil well safety control. We built a prototype of a portable gamma camera for real-time and in-situ analysis based on the coded mask technique. The prototype...
The 3D visualization and event-display, in particular, is an unavoidable part of any modern accelerator and non-accelerator experiment. Currently, there are a lot of those systems - any large experiment develops something on their one. Still, none of those systems has a stable open-source distribution and most of them are developed for a specific experiment and hard to port for another...
NEST (Noble Element Simulation Technique) is a comprehensive, semi-empirical standalone package for the complete and accurate simulation of both the scintillation light and ionization yields of Xenon and Argon for many particle types (nuclear recoils, electron recoils, alphas, other interactions) as well as resolution and pulse shapes.
A significant number of updates to the NEST models, which...
Right on time for several large scale experimental upgrades, the widely used and long-standing air shower simulation toolkit CORSIKA will be updated to a "state of the art" C++ simulation framework.
To meet the simultaneously rising demand for high-quality air shower simulations and the ecologic necessity to reduce energy consumption several new possibilities for optimizations will be tested....
The Baryonic Matter at the Nuclotron (BM@N) experiment [1] is first experiment at the NICA (Nuclotron-based Ion
Collider fAcility) [2], where runs with collection of experimental data have been performed. The software package BmnRoot [3]
is used both for simulation of setup operation and analysis of experimental data. Due to complexity of algorithms event
reconstruction is time-consuming...
We present a study of the ionization efficiency in pure materials based on an extension of Lindhard's original theory, in which the energy given to atomic motion by nuclear recoils is calculated taking into account a nonzero constant binding energy. We construct a modified integral equation that incorporates this effect consistently and find a numerical solution to this equation that leads to...
Amplitude and time measurements from digitized signals of the pseudo-Gaussian shape are considered. This form covers
a big part of applications. The least squares method (l.s.m.) is chosen as the optimal algorithm for determining
signal amplitude $A$ and timestamp $t_0$. For a pseudo-Gaussian profile with an uncorrelated sampling
the l.s.m. is reduced to analytical formulas for $A$ and...
The study of variations in the muon flux intensity distribution functions (MFIDF) was carried out on the basis of digital processing of time series of matrix data of the URAGAN hodoscope (MEPhI). The definition of normalized variations of the MFIDF was introduced. An algorithm for calculating the normalized variations of the MFIDF is proposed. The calculated normalized MFIDF variations were...
The ALICE online and offline data processing framework O$^2$ aims to handle the huge data rate to be expected in ALICE during LHC Run3 and Run4 which is estimated to be greater than 1TB/sec in 50 kHz Pb-Pb collisions. The ALICE photon spectrometer (PHOS) and charged particle veto detector (CPV) will be upgraded to meet these extensive requirements. The new software for data readout,...
