Conveners
Projects NICA/MPD/SPD/BM@N at JINR
- Peter Parfenov (JINR, NRNU MEPhI)
Projects NICA/MPD/SPD/BM@N at JINR
- Daria Flusova (TPU)
Projects NICA/MPD/SPD/BM@N at JINR
- Dmitry Finogeev (INR RAS)
Projects NICA/MPD/SPD/BM@N at JINR
- Arseniy Shabanov (INR RAS)
The Detector Control System (DCS) of the Time Projection Chamber (TPC) in the NICA/MPD experiment uses DIM (Distributed Information Management System) for fast and reliable data transfer between TPC and MPD DCS. To provide a monitoring, we integrated DIM with the industrial SCADA system - MasterScada 4D. This solution can be applied to other MPD subdetectors.
Modern experiments in physics are impossible without computer
simulations. The NICA MPD experiment also includes this stage.
The key element for accurate simulation is a detailed detector geometry. Geometry for physical modeling must contain information not only about the physical dimensions and materials of individual elements, but also information about the volumes formed in the detector....
An experimental study of xenon–cesium iodide interactions at a kinetic energy of 3.8 AGeV was conducted during the first physics run of the BM@N experiment. The BM@N setup incorporates forward detectors: the Forward Hadron Calorimeter (FHCal) and the Forward Quartz Cherenkov Hodoscope (FQH), which are employed to determine the geometry of nuclear collisions. This work presents a comparison of...
Centrality determination is essential in relativistic heavy-ion collisions, as it establishes a quantitative relationship between the final-state observables and the collision impact parameter - the key variable governing the initial-state geometry and energy density. This mapping enables robust comparisons among experimental measurements, theoretical calculations, and results from different...
The Multi-Purpose Detector (MPD) at the NICA facility is designed to study heavy-ion collisions at $\sqrt{s_{NN}} = 4$–$11$ GeV, aiming to explore the baryon-rich region of the QCD phase diagram to investigate the possible existence of a first-order phase transition and a critical end-point. Dilepton measurements, particularly the invariant mass spectrum of dielectrons, serve as a key...
Study of strange particle production in nuclear collisions is one
of the most important items of the physics program of the MPD experiment.
As previously demonstrated on simulated data, the detector will provide
good conditions for reconstruction of strange particles via their
weak decays to charged products in the collider mode of NICA operation.
In this work, it is shown that the...
Currently, there are serious contradictions in the description of p-d scattering at sufficiently high energies and momentum transfer. They manifest themselves not only between theory and experiment, but also between the results of two different experiments of high quality for their time. Thus, the differential cross sections of elastic p-d scattering at √s = 8.9 – 9.7 GeV and |t|= 0.6 – 1.8...
Method for increasing the efficiency of registration of minimum ionizing particles by fast detector on microchannel plates.
F.F.Valiev, N.I.Kalinichenko, A.Kozhedub, N.A.Makarov, V.N.Popov, G.A.Feofilov
St. Petersburg State University
Fast detectors on the microchannel plates (MCPs) have high time characteristics (short pulses of ~2 ns at the base, with a front at < 800 ps). They...
One of the important parts of the MPD experiment is the electromagnetic calorimeter ECal, which consists of 50 half-sectors, each containing 768 cells (towers) of different types and spatial orientations [1]. To test the calibration procedure on cosmic ray muons, the half-sector position was changed by rotating it around the central axis, which corresponded to its positions in the final...
Collective flow measurements in relativistic heavy-ion collisions can provide key constraints on the properties of strongly-interacting matter and its Equation of State (EoS) in the high net-baryon density regime. Light nuclei, such as deuterons, are particularly valuable in this context: their v1 coefficients are sensitive to the early-stage pressure gradients, and help distinguish between...
The Baryonic Matter at Nuclotron (BM@N) experiment at the NICA accelerator complex is currently in its active phase, analyzing data collected from the first physics run, and preparing for future data taking.
One of the most important software components for event reconstruction in high-multiplicity environment of heavy-ion interactions is a track reconstruction package. At BM@N, it was...
A Highly Granular time-of-flight Neutron Detector (HGND) is currently under development for use in the BM@N experiment to measure the yields and flow of neutrons with energies of 0.3–4 GeV [1]. The ratio of neutron to proton yields and the neutron-proton differential directed flow are sensitive to the contribution of symmetry energy to the equation of state of dense nuclear matter in Au-Au...
To extend the capabilities of the fixed-target BM@N experiment (JINR, Dubna), the Highly Granular Neutron Detector (HGND) [1] has been developed. This detector will enable unique measurements of neutrons in the kinetic energy range of 0.3-4.0 GeV. The HGND comprises two arms, each consisting of 8 layers of plastic scintillator with copper absorber plates in between. Each scintillation layer is...
The Highly Granular Neutron Detector (HGND) is designed for the BM@N experiment, aimed at investigating neutron emission in heavy ion collisions at beam energies of up to 4A GeV. The HGND allows the identification of neutrons and the reconstruction of their energies using time-of-flight method, which is crucial for analyzing neutron yields and azimuthal flow. Given the challenging energy range...
The Highly Granular Neutron Detector (HGND) is being developed for the BM@N (Baryonic Matter at Nuclotron) experiment on the extracted beam of the Nuclotron (JINR, Dubna). The HGND will be used to measure the neutron yields in energy range 300 – 4000 MeV as well as azimuthal asymmetry of neutron flow in nucleus-nucleus collisions at beam energies of 2–4 AGeV. At these energies, nuclear density...
A new silicon tracking station has been developed and implemented as part of the upgrade of the BM@N experiment’s tracking system at the Nuclotron, aimed at studying heavy-ion collisions. The station is based on CBM-BM@N–type double-sided silicon microstrip modules equipped with high-rate streaming readout electronics using STS-XYTER chips. Signal routing is realized via ultra-lightweight...
The Electromagnetic Calorimeter (ECal) is designed to measurement position, energy and time of flight of photons and electrons in heavy-ion collisions. This report presents the status of ECal testing for the Multi-Purpose Detector (MPD) at the NICA collider.
Full chain track reconstruction in TPC detector for the real experiment is presented. Three necessary components: native TPC geometry, fast multithreaded clustering and ACTS tracking were implemented to work together to achieve the future goal of superior performance in tracking efficiency and computational speed. Preliminary performance benchmarks in mass production simulations will be demonstrated.
The Multi-Purpose Detector (MPD) experiment is a flagship heavy-ion experiment of the NICA facility at JINR, in Dubna expected to start operation in 2026. The experiment will operate in the energy range $\sqrt{s_{\rm NN}}$ = 4-11 GeV in collider mode and $\sqrt{s_{\rm NN}}$ = 2.4-3.5 GeV in fixed-target mode which covers the high net-baryon density region of the QCD phase diagram.
Particle...
This work discusses the current status of the Forward Hadron Calorimeter (FHCal) at MPD/NICA as its launch approaches. The main goal of FHCal is measurement of geometry of interaction by estimating of centrality and reaction plane orientation. Each arm of the FHCal will comprise 44 heterogeneous modules, and one of these arms has already been assembled in Dubna. A brief overview of the...
