At present, the accelerator complex NICA [1] is being built at JINR (Dubna). It is intended for performing experiments to study interactions of relativistic nuclei and polarized particles (protons and deuterons). One of the experimental facilities MPD (MultiPurpose Detector) [2] was designed to investigate nucleus-nucleus, proton-nucleus and proton-proton interactions.
As one of the...
The Multi-Purpose Detector (MPD) at NICA collider has a substantial discovery potential concerning
the exploration of the QCD phase diagram in the region of high net-baryon densities and moderate temperatures.
The anisotropic transverse flow is one of the key observables to study the properties of dense
matter created in heavy-ion collisions. The MPD performance for anisotropic flow...
We propose to study the angular distributions of the energy deposited in FHCal modules. The obtained distributions were fitted by the linear function on event-by-event basis. This fit allows to extract the transverse gradient of the spectator energy in the calorimeter and also the energy carried by free spectators inside the beam hole. The clear correlations between the fit parameters are...
Centrality is a key parameter for defining the collision system size in relativistic heavy-ion collisions.
It provides a tool for selecting events according to cross section in a similar way in different
experiments and with theoretical model calculations.
The progress of centrality determination in Au+Au collisions at
Multi-Purpose Detector (MPD) at the future NICA collider is...
In a frame of the NICA / MPD project, a unique cylindrical electromagnetic calorimeter (ECal) is being created. Recently, the design of the power frame made of carbon fiber was completed. This led to significant changes of the calorimeter structure. This report gives a brief description of the new ECal geometry, the modification of simulation procedure and the current basic parameters of the...
Forward-backward multiplicity correlations have been studied in electron-positron, proton-proton and more recently in lead-lead collisions. For the proton-proton case, comparison of experimental results to different models reveals an incomplete understanding of the physical phenomenon associated with these correlations. In this work, we present a study of forward-backward multiplicity...
Modern theories of physics are elaborate, math-heavy constructions that aim to encompass the workings of the world in the largest possible scales on the one hand (relativistic cosmology), and on the deepest subatomic level on the other (quantum field theories). What they share in common is the special kind of raw, majestic beauty, which not only enthralls theorists (including Einstein and...
Report presents problems and solutions of MPD Yoke production. There are short descriptions about
production tolerances of main details, Yoke control assembly, transportation and axillary equipment
production.
ECal type "shashlik" having sampling 300 micron Pb and transverse cell size ~4x4 cm2 has the ability to measure energy with the resolution up to 5% in the range of energy at NICA.
Due to not fully projective geometry of the detector (the reason is the large scatter of the interaction point), in certain cases, a correction of the hit position depending on the interaction point is needed. As an...
As part of the NICA/MPD project, a unique cylindrical electromagnetic calorimeter (ECal) is being created with a diameter of 2 m, a length of 6 m and a total weight of about 60 tons. Recently, the design of a 12-ton power frame of ECal made of carbon and glass-plastic was completed. This led to the need for a significant changes in the structure of ECal. A new program for the geometric...
The report describes a database being developed to store a large amount of information about the electromagnetic calorimeter of MPD. A brief description of the manufacture of calorimeter modules is given. The advantages of using the database during the creation and operation of the electromagnetic calorimeter are shown.
We present the current status of Forward Hadron Calorimeter (FHCal) at MPD. It consists of two arms, each comprises 44 individual modules. The performance of FHCal for the determination of the geometry of heavy ion collisions will be discussed.
The status of the FHCal modules production will be reported. The approaches in the energy calibration of FHCal with cosmic muons will be reported. The...
The Multi-Purpose Detector (MPD) is being constructed to study the properties of extremely dense nuclear matter formed in relativistic nucleus-nucleus collisions at NICA energies. The yields of strange and charmed particles are the important observables sensitive to critical phenomena in phase transitions of the QGP-matter at high net-baryon density. Highly efficient registration of such...
The MexNICA collaboration proposed in 2016 a beam-beam monitoring detector system (BE-BE) for the MPD-NICA experiment. This BE-BE detector is able to provide complementary capabilities such as a trigger signal for MPD to identify and to discriminate beam-beam minimum bias or centrality events from background and beam-gas interactions. Additionally, the BE-BE detector is useful for luminosity...
The article shows the present construction state of the MCORD detector (MPD Cosmic Ray Detector) demonstrator and early designstatus of the full MCORD detector based on thelong and thin plastic scintillators with silicon photomultiplier photodetectors (SiPM) for the photon readout. Additionally we describethe analog front-end and digital electronic system based on MicroTCA crate. The...
Centralized equipment monitoring is an integral part of physical experiments. Convenient display and subsequent extraction of the stored values from the database reduces human error probability, simplifies the process of data collection and allows it to be used in the processing data from the detectors, increasing the quality of the results.
Modern technologies and standarts make it...
The BM@N (Baryonic Matter at Nuclotron) is the first experiment to be realized at the accelerator complex of NICA-Nuclotron at JINR (Dubna, Russia). The aim of the experiment is to study interactions of relativistic heavy ion beams with a kinetic energy from 1 to 4.5 AGeV with fixed targets. Status of detector setup simulation is presented including geometry description and Monte-Carlo data...
Big modern physics detector experiments represent a collaboration of workgroups and require wide variety of electronic equipment. All devices can be classified into two categories - Data Acquisition (DAQ) equipment and hardware that is not time-critical and can be run at low priority.
But the statuses and stored data from these systems, such as high voltage systems, gas systems, temperature...
