NICA Accelerator Complex Research Articles

Geometry import into virtual reality visualization engine for HEP experiments at BM@N

Modern visualization and multimedia platforms, such as Unity, provide immersive interaction for HEP experiment data analysis. In this work, we present the method for importing the detector geometry, solids hierarchy, and materials from GDML format directly to Unity. This method is based on parsing files in GDML format and generating the geometry using mesh generation algorithms and Constructive Solid Geometry methods. The provided method is applied to the BM@N experiment at NICA accelerator complex in Joint Institute of Nuclear Research and can be used in virtual reality and augmented reality applications for data analysis and outreach events in high energy physics experiments.

Studying the Possibility of Dynamic Spin Handling for Polarized Protons and Deuterons at the NICA Accelerator Complex

Studying the Possibility of Dynamic Spin Handling for Polarized Protons and Deuterons at the NICA Accelerator Complex

Analysis of Emerging Particle Tracks in the BM@N Experiment of the NICA Accelerator Complex in the Mathematical Model of Fractal Thermodynamics

Analysis of Emerging Particle Tracks in the BM@N Experiment of the NICA Accelerator Complex in the Mathematical Model of Fractal Thermodynamics

Simulation of the Quantum Fuzzy Inference of the Intelligent Control System for Cooling the Current Leads of the Booster of the NICA Accelerator Complex

Simulation of the Quantum Fuzzy Inference of the Intelligent Control System for Cooling the Current Leads of the Booster of the NICA Accelerator Complex

ByPass optics design in NICA storage ring for experiment with polarized beams for EDM search

Experiments with polarized beams for EDM search in the NICA accelerator complex implies the design of an additional ByPass channels. Such alternative channels will make possible to use NICA as a storage ring and get enough statistical data.

Designing Bypass Channels in NICA Accelerator Complex for Polarized Beam Experiments for EDM Search

Designing Bypass Channels in NICA Accelerator Complex for Polarized Beam Experiments for EDM Search

Impact Magnetic Kicker for Extracting the Ion Beam from the Nuclotron of the NICA Accelerator Complex

Impact Magnetic Kicker for Extracting the Ion Beam from the Nuclotron of the NICA Accelerator Complex

High-Voltage Grip Feedthrough of the Magnetic Kicker for Ion Beam Extraction from the Nuclotron of the NICA Accelerator Complex

High-Voltage Grip Feedthrough of the Magnetic Kicker for Ion Beam Extraction from the Nuclotron of the NICA Accelerator Complex

A Monte Carlo Study of Hyperon Production with the MPD and BM@N Experiments at NICA

Study of the strangeness production in heavy-ion collisions is one of the most important parts of the physics program of the BM@N and MPD experiments at the NICA accelerator complex. With collision energies sNN of 2.3–3.3 GeV in the fixed target mode at BM@N and 4–11 GeV in the collider mode at MPD, the experiments will cover the region of the maximum net baryon density and provide high-statistics complementary data on different physics probes. In this paper, some results of Monte Carlo studies of hyperon production with the BM@N and MPD experiments are presented, demonstrating their performance for investigation of the objects with strangeness.

Generative Adversarial Networks for the fast simulation of the Time Projection Chamber responses at the MPD detector

Detailed detector simulation models are vital for the successful operation of modern high-energy physics experiments. In most cases, running detailed models requires a significant amount of computing resources. It is desired to have approaches that are less resource-intensive. In this work, we demonstrate the applicability of Generative Adversarial Networks (GAN) as a basis for such fast-simulation models for the case of the Time Projection Chamber (TPC) at the MPD detector at the NICA accelerator complex. Our prototype GAN-based model of TPC works faster than the detailed simulation in an order of magnitude without any noticeable drop in the quality of the high-level reconstruction characteristics for the generated data. Approaches with direct and indirect quality metrics optimization are compared.

Acceleration and crossing of transition energy investigation using an RF structure of the barrier bucket type in the NICA accelerator complex

The dynamic of longitudinal motion in Barrier Bucket RF structure is considered. To preserve the stability of the proton beam during the acceleration to the experiment energy it is necessary to cross the transition energy and a rapid jump of transition energy is possible. The influence of the second-order slip factor is taking into account. The dynamic aperture is investigated for various gradients of focusing quadrupoles and corresponding working points which is necessary for transition crossing.

Thermodynamic Characteristics of Doublets of Quadrupole Magnets for the Booster Synchrotron at the NICA Accelerator Complex

Thermodynamic Characteristics of Doublets of Quadrupole Magnets for the Booster Synchrotron at the NICA Accelerator Complex

Construction of Stations for Applied Research at the NICA Accelerator Complex

Construction of Stations for Applied Research at the NICA Accelerator Complex

Quadrupole Superconducting Model for Update of the Nuclotron Synchrotron

The accelerator Nuclotron is one of the most important installations of the NICA accelerator complex in Dubna, which also includes a booster synchrotron and a collider. The superconducting booster synchrotron was put into operation at the end of 2020, the superconducting collider is in the final stage of assembly. Its launch is scheduled for late 2022. The magnetic system of the superconducting synchrotron Nuclotron has been in operation since 1993 and will require upgrade in the coming years. One of the possible options for upgrading the Nuclotron is to replace its magnets with magnets made of HTS material. A model superconducting quadrupole magnet with a winding of HTS material has been developed and manufactured at Veksler and Baldin Laboratory of High Energy Physics of Joint Institute for Nuclear Research. The design features and the first results of cryogenic tests of the magnet are discussed.

Local Quality Control of Helical CORC Cable Winding

Thispaper discusses the possibilities of detecting defects in the helical winding of CORC cables using Hall probe scanning method and a 4-contact measurement method using a “magnetic knife”. The “magnetic knife” technique consists in a local change of the external magnetic field on the investigated part of the cable, which leads to a change in the current-voltage characteristic (I–V curve) of the entire cable. The presence of defects is determined by the appearance of features in the I--V characteristic when the “magnetic knife” moves along the cable. The Hall probe scanning method is sensitive only to the section of the cable located close to the scanning plane, which is not suitable for finding a defect in the coils. And is not suitable for the analysis of deep layers of the tapes, only the signal from the upper tape can be measured. The “magnetic knife” technique makes it possible to detect defects in tapes, the ab-plane of which is located at an angle of less than 45 degrees to the direction of the magnetic field (that is, the ab-plane is almost perpendicular to the direction of the field). We have shown that the technique is well sensitive to local defects, leading to a local decrease in the critical current by 3% of the whole cable. The developed technique is planned to be used to control the quality of winding and laying of CORC cable when creating an inductive energy storage for the NICA accelerator complex.

The NICA Complex and the MPD experiment at JINR: status and physics potential

The Multi-Purpose Detector is under construction at the Joint Institute for Nuclear Research in Dubna, as part of the NICA Accelerator Complex. The MPD Collaboration aims to study the phase diagram of QCD matter at maximum baryonic density, determine the nature of the phase transition between the deconfined and hadronic matter and search for the critical point. The combination of significant luminosity at NICA, collider geometry of the experiment and collision energies √SNN spanning the range of 4 to 11 GeV, where the transition from baryon to meson dominated matter is expected will allow MPD to provide unique insight into these questions. The status of the assembly of the detector in MPD Hall, as well as the progress in the production of MPD subdetectors will be reported on. The design physics performance of the detector will be discussed with the emphasis on the measurements in the strangeness sector. Tracking and particle identification procedures will enable precise determination of spectra of identified hadrons, including hyperons and hypernuclei, with the possibility of differential measurements and total yield extraction. The quality of directed and elliptic flow determination will be discussed, with comparison to model expectations. The sensitivity of event-by-event fluctuations to the nature of the phase transition and the presence of a critical point will be given. The femtoscopic analysis for charged pions and kaons has shown sensitivity to first order and cross-over phase transitions in EoS seen for the vHLLE model. All those studies will be put in context of addressing outstanding questions on the properties of the region of the QCD phase diagram probed by heavy-ion collisions in the NICA energy range.

Description of the Beam Diagnostics Systems for the SOCIT, SODIT and SODIB Applied Research Stations Based on the NICA Accelerator Complex

Description of the Beam Diagnostics Systems for the SOCIT, SODIT and SODIB Applied Research Stations Based on the NICA Accelerator Complex

A Concept for Reconstruction of the Capsulated Microchip Structure Using Its Interaction with High-Energy Ion Beams of the NICA Accelerator Complex

A Concept for Reconstruction of the Capsulated Microchip Structure Using Its Interaction with High-Energy Ion Beams of the NICA Accelerator Complex

First Experiments with Accelerated Ion Beams in the Booster of NICA Accelerator Complex

First Experiments with Accelerated Ion Beams in the Booster of NICA Accelerator Complex

Simulating the time projection chamber responses at the MPD detector using generative adversarial networks

High energy physics experiments rely heavily on the detailed detector simulation models in many tasks. Running these detailed models typically requires a notable amount of the computing time available to the experiments. In this work, we demonstrate a new approach to speed up the simulation of the Time Projection Chamber tracker of the MPD experiment at the NICA accelerator complex. Our method is based on a Generative Adversarial Network – a deep learning technique allowing for implicit estimation of the population distribution for a given set of objects. This approach lets us learn and then sample from the distribution of raw detector responses, conditioned on the parameters of the charged particle tracks. To evaluate the quality of the proposed model, we integrate a prototype into the MPD software stack and demonstrate that it produces high-quality events similar to the detailed simulator, with a speed-up of at least an order of magnitude. The prototype is trained on the responses from the inner part of the detector and, once expanded to the full detector, should be ready for use in physics tasks.