
Methods,
Algorithms and Software for Modeling Physical Systems, 
Leaders: 
Gh. Adam 
Deputies: 
J.
Busa 
Participating
Countries and International organizations:
Armenia, Belarus, Brazil, Bulgaria, Canada, CERN, China, Czech Republic, France, Georgia, Germany, Hungary, Italy, Kazakhstan, Lithuania, Moldova, Mongolia, Poland, Romania, Russia, Slovakia, South Africa, Switzerland, Tajikistan, United Kingdom, USA, Vietnam.
Issues addressed and main goals of research:
Carrying out paramount advanced research in computational mathematics and physics, directed to the creation of new mathematical methods, algorithms, and software for the numerical or symbolicnumerical solution of topics arising in experimental and theoretical physics studies. This subject area includes a wide spectrum of investigations approved for completion in JINR within the sevenyear period 2017–2023 in high energy physics, nuclear physics, physics of condensed matter and of nanostructures, biophysics, information technologies, the solution of which is inseparable from the use of computing. Such subject matters of the outmost importance in JINR are the NICA project, the neutrino program, the superheavy and exotic nuclei physics, the neutron based investigations. The needed numerical or symbolicnumerical computing will be done on the Multifunctional Information and Computing Complex (MICC), primarily the HybriLIT heterogeneous computing platform which involves the training and test cluster HybriLIT and the "Govorun" supercomputer and the emerging Big Data distributed infrastructure. The research teams include both experienced scientists with outstanding scientific achievements and enthusiastic young scientists and engineers. The requested financing will cover salaries, participations in scientific conferences, scientific visits and the acquisition of a minimal number of personal computers and licenses, within the approved resources for MLITJINR. A distinctive feature of this research is the close cooperation of the Meshcheryakov Laboratory of Information Technologies (MLIT) with research groups from all JINR laboratories and Member State institutions.
Expected
main results in the current year:
Threedimensional
computer simulation of magnets for the NICA (JINR), NUCLOTRON (JINR)
and CBM (GSI) projects. The magnetic field map construction for
analysis of the field distribution quality in the working areas of
the magnets.
Optimization
of a portable magnetic device designed to study the ROTeffects in
the fission of heavy nuclei.
Implementation
of a hybrid FEMBEM method for modeling complex magnetic accelerator
systems in the COMSOL Multiphysics® environment and its use to
multiphysical modeling of the magnetic system for the SC230
isochronous cyclotron. Development of methods for correcting the
average magnetic field of an isochronous cyclotron based on the
solution of the equations of motion. Development and implementation
of the CORD (Closed ORbit Dynamics) program into the JINRLIB library
for the analysis of field maps of the SC230 isochronous cyclotron.
Molecular
dynamics modeling of structural changes in metals and metal
composites under irradiation with heavy ions and alpha particles,
description of experimental data.
Numerical
simulation of phase transitions (melting, evaporation and ablation)
in materials exposed to femtosecond laser pulses.
Numerical
study of the statistical properties of structures with extended
nanosize defects.
Computer
modeling of spin dynamics in spintronic materials and development of
methods governing spin reversal effects.
Investigation
of the spin filtering effect by the corrugation graphene.
Research
and software implementation of methods for the numerical solution of
stiff systems describing spintronic models.
Study
of nucleusnucleus and protonnucleus interactions in a wide range of
energies using microscopic models and various models of the density
of colliding nuclei. Investigation of reactions involving the
^{17}
F
isotope on stable targets at medium energies
Application
of the dibaryon resonance model to study and calculate the
characteristics of light nuclei with A = 6, including the twoproton
decay of ^{6}Be.
Estimation
of the dripline for neutronexcess nuclei.
Study
of spatially localized temporally periodic or quasiperiodic solutions
of the phi4 equation on the basis of new finitemode approximations
for the bound state of the wobbling kink and breather in one
dimension and for the threedimensional oscillon.
Analytical
and numerical study of the role of the spinor field in the formation
of black holes and the evolution of the Universe.
Development
of algorithms for computing the primary atomic displacement cross
sections by fast electrons in solids.
Modernization
of software developed for the study of properties of new materials
and nanosystems by modern neutron scattering methods.
Extension
of the basic element method (BEM) to the solution of stiff problems
and its use for solving applied problems, including processing and
analysis of neutron noise of the IBR2M reactor and approximating the
dependence of the energy losses of charged particles in the
ionization chamber (STAR experiment).
Development
of Bayesian automatic adaptive quadrature algorithms of high
fidelity.
Application
to open systems of the developed methodology for the stochastization
of dynamic onestep systems.
Modification
of the Bayesian selection method of the best model parameters of
nuclear matter in the analysis of the latest existing and planned
discoveries of astrophysical phenomena of compact stars by
multichannel astronomy.
Numerical
study of the quarkhadron phase transition in the energy range of the
NICA collider.
Numerical
analysis of heavy ion fragmentation reactions in the framework of
transportstatistical models, comparison with the experiment.
Development
of phenomenological models of hadronhadron interactions of the
Geant4 package for the energy range in which the perturbative QCD
does not work, and their application for calculating the
experimental conditions of JINR, GSI, CERN experiments with hadronic
and nuclear beams.
Creation
of a combined generator of nucleusnucleus collisions DCMQGSMSMM,
with further modification by including the production of heavy
resonances, dileptons and hyperphragments. Mass generation of
nucleusnucleus collisions for the BM@N and MPD experiments.
Optimization,
development and refactoring of the MPD detector software.
Development
of alignment algorithms for the timeprojection camera TPC of the MPD
detector, taking into account the accumulating space charge.
Development
of the structure, software and operating model of a quantum
intelligent regulator of nitrogen and helium consumption for a
superconducting magnet, taking into account possible operating modes,
various emergency situations included.
Development
of an intelligent system for controlling the modes of the
highfrequency stations of the Nuclotron of the NICA accelerating
complex using quantum soft computations.
Completion
of the development and upgrade of information systems of geometric
and configuration databases, as well as a database of metadata of
physical events for the NICA experiments.
Development
of event reconstruction algorithms, realistic simulation of responses
and detailed ROOT geometry for the configuration of the central track
detectors of the BM@N experiment in 2022.
Development
and implementation of algorithms for modeling and data reconstruction
in the track detectors of the BM@N experiment for the preparation and
conduct of the physical session in 2022.
Development
of the data aquisition software for the BaikalGVD project.
Monte Carlo modeling of the OLVEHERO prototype within the FAIRRoot and
Geant4 framework. Study of the systematic errors and the influence of
the geometry of the experiment on the results.
Testing
the developed algorithms for building the distributions of cosmic
rays arrival directions for their correctness while processing the
NUCLEON experiment data obtained in different modes of the cosmic
apparatus flight.
Development
of nonstandard statistics analysis methods of rare events in
experiments with superheavy nuclei.
Agreed
support for the ATLAS experiment software: further development of the
ATLAS Event Picking Service, maintenance of the ATLAS EventIndex
monitoring system; development and upgrade of the CREST information
system, software for the conversion of ATLAS ConditionDB data from
COOL API to CREST; upgrade of operational monitoring of the ATLAS
TDAQ system based on new versions of GRAFANA.
Improvement
of methods for reconstructing the trajectories of charged particles
and calculations of the efficiency and resolution of cathodestrip
chambers with updated electronics in the CMS experiment.
Testing,
debugging in accordance with user requirements and commissioning of
the geometry database for the CBM experiment. Development
of a database concept for selecting useful events.
List of Activities: 



Activity or experiment 
Leaders 


Laboratory
or other 
Main researchers 

1. 
Mathematical
and computation 
Gh.
Adam 


MLIT 
V.
Abgaryan, S. Adam, P.G. Akishin, I.V. Amirkhanov, 

VBLHEP 
G.N.
Agakishiev, H.G. Khodzhibagiyan, V.P. Ladygin, 

BLTP 
D.E.
AlvarezCastillo, D. Blaschke, A.A. Donkov, 

FLNR 
A.G.
Artukh, E. Batchuluun, M.N. Mirzaev, A. Oleinichak, 

FLNP 
A.S.
Doroshkevich, T.A. Lychagina, D.I. Nikolaev, V.V. Novitsky, E.P.
Popov, Yu.N. Pepelyshev 

DLNP 
G.A.
Karamysheva, O.V. Karamyshev, I.N. Kiyan, I.D. Lyapin, V.A.
Malinin, D.V. Popov, K. Semek, G.D. Shirkov 
2. 
Software
complexes and 
P.V.
Zrelov 


MLIT 
E.P.
Akishina, E.I. Aleksandrov, I.N. Aleksandrov, D.A. Baranov, A.S.
Bondyakov,
J. Buša Jr., O.Yu. Derenovskaya, I.A. Filozova, S. Hnatič, A.I. Kazymov, A.O. Kondratyev, B.F. Kostenko, E.A.Kuznetsov,
M.A. Mineev, 

VBLHEP 
A.S.
Andreev,
P.N. Batyuk, B.V. Batyunya, O.I. Brovko, 

BLTP 
V.D. Toneev 

FLNR 
Yu.S. Tsyganov, V.K. Utenkov 

DLNP 
V.A.
Bednyakov, I.A. Belolaptikov, V.M. Grebenyuk, 

UC 
S.Z.
Pakulyak 
3. 
Numerical
methods, algorithms 
Gh.
Adam 


MLIT 
P.Kh.
Atanasova, A.S. Аyriyan, D.R. Badreeva, D.A. Baranov, M.V.
Bashashin, S.D. Belov, D.V. Belyakov, 

MLITMICC 
V.V. Mitsyn, T.A. Strizh 

FLNR 
R.
Kabytayeva, S.V. Mitrofanov, Yu.Ts. Oganesyan, 

BLTP 
D.
Blaschke, A.A. Donkov, A.V. Friesen, A.S. Hvorostuhin, 

VBLHEP 
A.Yu. Boytsov, E.E. Donets, K.V. Gertsenberger 

DLNP 
G.A. Karamysheva, A.S. Zhemchugov 

FLNP 
M.
Balasoiu, W. Badavy, M.V. Frontaseva, M.F. Kiselev, 

LRB 
I.A.
Kolesnikova, M.G. Lalkovicova, K.N. Lyakhova, 
4. 
Methods,
algorithms and software 
D.V.
Podgainy 


MLIT 
V.
Abgaryan, M. Bures, O. Chuluunbaatar, A.A. Gusev, 

BLTP 
R.G.
Nazmitdinov, V.V. Braguta,
A. I. Titov, N.A. Tyurin, 

VBLHEP 
O.V. Rogachevsky 

LRB 
A.V. Czhizhov 
Collaboration
Country or International Organization 
City 
Institute or laboratory 
Armenia 
Yerevan 
Foundation ANSL 


RAU 


YSU 
Belarus 
Brest 
BrSU 

Minsk 
IM NASB 
Brazil 
Sao Carlos, SP 
IFSC USP 
Bulgaria 
Plovdiv 
PU 

Sofia 
IMI BAS 


INRNE BAS 


SU 
Canada 
Toronto 
IBM Lab 
CERN 
Geneva 
CERN 
China 
Beijing 
CIAE 


IHEP CAS 
Czech Republic 
Ostrava 
VSBTUO 

Prague 
CTU 
France 
Nancy 
UL 

Saclay 
IRFU 
Georgia 
Tbilisi 
GTU 


TSU 


UG 
Germany 
Darmstadt 
GSI 

Frankfurt/Main 
Univ. 

Hamburg 
Univ. 

Karlsruhe 
KIT 

Kassel 
Uni Kassel 

Munich 
LMU 

Rostock 
Univ. 
Hungary 
Budapest 
Wigner RCP 
Italy 
Genoa 
INFN 
Kazakhstan 
Almaty 
INP 


KazNU 
Lithuania 
Kaunas 
VMU 
Moldova 
Chisinau 
IAP 


MSU 
Mongolia 
Ulaanbaatar 
IMDT MAS 
Poland 
Krakow 
INP PAS 


JU 


UEK 

Lublin 
UMCS 

Warsaw 
IMGWPIB 

Wroclaw 
UW 
Romania 
Bucharest 
IFINHH 


UB 

ClujNapoca 
INCDTIM 

Magurele 
IFA 


ISS 

Timisoara 
UVT 
Russia 
Dolgoprudny 
MIPT 

Dubna 
Dubna State Univ. 

Gatchina 
NRC KI PNPI 

Irkutsk 
ISU 

Moscow 
GPI RAS 


ITEP 


MRSU 


MSU 


NNRU "MEPhI" 


PFUR 


PRUE 


RCC MSU 


SINP MSU 

Moscow, Troitsk 
INR RAS 

Novosibirsk 
SKIF 

Perm 
PSNRU 

Puschino 
IMPB RAS 

Saratov 
SSU 

St. Petersburg 
NIIEFA 


SPbSU 

Vladikavkaz 
NOSU 
Slovakia 
Banska Bistrica 
UMB 

Kosice 
IEP SAS 


TUKE 


UPJS 

Zilina 
UZ 
South Africa 
Cape Town 
UCT 

Port Elizabeth 
NMU 

Stellenbosch 
SU 
Switzerland 
Zurich 
ETH 
Tajikistan 
Dushanbe 
PHTI NAST 

Khujand 
KSU 
United Kingdom 
London 
Imperial College 

Plymouth 
Univ. 
USA 
Cambridge, MA 
MIT 

Davis, CA 
UCDavis 

Los Angeles, CA 
UCLA 

Louisville, KY 
U of L 

San Diego, CA 
SDSU 

Upton, NY 
BNL 
Vietnam 
Hanoi 
VNU 

Ho Chi Minh City 
CNT VINATOM 
▲ 