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at the JINR Nuclotron-M/NICA Facility
| Theme leaders: | E.A. Strokovsky V.P. Ladygin |
| Deputies: | N.M. Piskunov R.A. Shindin |
Participating countries and international organizations:
Bulgaria, France, Japan, Romania, Russia, Slovakia, Sweden, United Kingdom, USA, Uzbekistan.
The problem under study and the main purpose of the research:
Polarization studies are undoubtedly relevant now. They combine the efforts of the JINR Laboratories and many foreign laboratories, both participating and non-participating countries, in the design and conduct of experiments using unique beams of polarized deuterons with energies ranging from 5 MeV per nucleon to 5.6 GeV/n, secondary beams of polarized protons and neutrons, as well as beams of polarized protons directly accelerated in the Nuclotron. The possibility of obtaining beams of accelerated polarized protons in the Nuclotron without significant investment, demonstrated in 2017, became the basis for intensifying work on the spin program of the NICA project and, in particular, for the development of polarimetry techniques, the creation of new methods for precise control of the direction
of the spin of protons, deuterons and other particles. This part of the work on the topic is directly related to the creation of the NICA complex and the testing of a new approach to controlling the polarization in the spin transparency mode. Of undoubted interest is also the study of the possibility of setting up experiments at the upgraded Nuclotron and the collider to measure EDM and parity violation. Within the framework of the theme, two projects are being carried out: ALPOM-2 and DSS. Preparation of the project on spin effects measurements in nucleon-nuclear scattering with using Movable Polarized Target and modernized Delta-Sigma spectrometer is under consideration. A new project is a systematic study of spin effects in the processes of production of strange baryons and vector mesons in elementary reactions and in cold dense nuclear matter at Nuclotron energies using beams of polarized and unpolarized particles on a fixed target and a wide-aperture magnetic spectrometer. Taking into account the presence of polarized beams, new experimental data will be obtained on the study of charge-exchange processes, on the study of the structure of 2- and 3-nucleon correlations in the reactions of deuteron-proton elastic scattering and deuteron breakup, by measuring of the vector and tensor analyzing powers in the deuteron core region, as well as other processes that are important for the development of the theoretical models describing the interactions of the simplest nuclear systems with allowance for relativism and the contribution of the meson and quark-gluon components of the internal motion of constituents in nucleons.
| Projects in the theme: | |||
| Name of the Project | Project Leaders | Project code | |
| 1. | ALPOM-2 | N.M. Piskunov Deputies: E. Tomasi-Gustafsson V. Punjabi R.A. Shindin |
02-1-1097-1-2010/2027 |
| 2. | DSS | V.P. Ladygin | 02-1-1097-2-2010/2027 |
Projects:
| Name of the project | Project Leaders | ||
| Laboratory Responsible from laboratories | |||
| 1. | ALPOM-2 | N.M. Piskunov Deputies: E. Tomasi-Gustafsson V. Punjabi R.A. Shindin |
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| VBLHEP | S.N. Bazylev, A.A. Druzhinin, O.P. Gavrishchuk, D.A. Kirillov, K.S. Legostaeva, A.N. Livanov, P.A. Rukoyatkin, I.M. Sitnik |
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Brief annotation and scientific rationale:
At present, it is necessary to measure the analyzing powers of protons and neutrons in scattering on CH2, CH and other targets. Such data are necessary for experiments requiring measurements of the polarization of protons and neutrons in nuclear reactions. It also needs optimization hadronic polarimetry and expanding the database on analyzing powers both for protons, the same for neutrons. This is possible only in Dubna, where polarized proton beams and neutrons obtained by fragmentation of accelerated polarized deuterons.
At present, it is necessary to measure the analyzing powers of protons and neutrons in scattering on CH2, CH and other targets. Such data are necessary for experiments requiring measurements of the polarization of protons and neutrons in nuclear reactions. It also needs optimization hadronic polarimetry and expanding the database on analyzing powers both for protons, the same for neutrons. This is possible only in Dubna, where polarized proton beams and neutrons obtained by fragmentation of accelerated polarized deuterons.
Expected results upon completion of the project:
Investigation of the analyzing powers in the scattering of polarized protons (at momenta up to 7.5 GeV) and neutrons (at momenta up to 6 GeV) on polyethylene, at the ALPOM-2 setup.
Investigation of the analyzing powers in the scattering of polarized protons (at momenta up to 7.5 GeV) and neutrons (at momenta up to 6 GeV) on polyethylene, at the ALPOM-2 setup.
Expected results of the project this year:
Completion of the modernization of the setup (new drift chambers and a new wide-aperture hadron calorimeter), the beginning of measurements on beams of polarized nucleons.
Completion of the modernization of the setup (new drift chambers and a new wide-aperture hadron calorimeter), the beginning of measurements on beams of polarized nucleons.
| 2. | DSS | V.P. Ladygin |
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| VBLHEP | E.V. Chernykh, Yu.V. Gurchin, A.Yu. Isupov, N.B. Ladygina, K.S. Legostaeva, A.N. Livanov, S.G. Reznikov, A.A. Terekhin,A.V. Tishevsky, I.S. Volkov | |
| DLNP | G.I. Lykasov | |
Brief annotation and scientific rationale:
Study of the structure of 2- and 3-nucleon correlations in the reactions of deuteron-proton elastic scattering and deuteron breakup by measuring of the vector and tensor analyzing powers in the region of the deuteron core, as well as other processes important for the development theoretical models describing the interactions of the simplest nuclear systems, taking into account relativism and the contribution of the meson and quark-gluon components of the internal motion of constituents in nucleons.
Study of the structure of 2- and 3-nucleon correlations in the reactions of deuteron-proton elastic scattering and deuteron breakup by measuring of the vector and tensor analyzing powers in the region of the deuteron core, as well as other processes important for the development theoretical models describing the interactions of the simplest nuclear systems, taking into account relativism and the contribution of the meson and quark-gluon components of the internal motion of constituents in nucleons.
Expected results upon completion of the project:
Measurement of the structure of 2- and 3-nucleon correlations in deuteron-proton elastic scattering and nonmeson deuteron breakup in the experiments at the Nuclotron internal target.
Measurement of the structure of 2- and 3-nucleon correlations in deuteron-proton elastic scattering and nonmeson deuteron breakup in the experiments at the Nuclotron internal target.
Measurement of cross sections and analyzing powers of these reactions. Performing experiments on the deuteron and proton spins manipulation, development of the polarimetry at the Nuclotron internal target.
Obtaining of the experimental data on many-particle correlations in nucleus-nucleus interactions.
Expected results of the project this year:
Completion of the analysis of data on the analyzing powers Ay, Ayy and Axx of the deuteron-proton scattering up to 1800 MeV.
Completion of the analysis of data on the analyzing powers Ay, Ayy and Axx of the deuteron-proton scattering up to 1800 MeV.
Upgrade of the deuteron and proton polarimeter at the Nuclotron internal target.
Publication of the results obtained on the polarimetry, on the deuteron analyzing powers in deuteron-proton elastic scattering and many-particle correlations in nucleus-nucleus interactions.
Activities of the theme:
| Name of the activity | Leader | Implementation period | |||
| Laboratory Responsible from laboratories | Status | ||||
| 1. | Development of spin physics research infrastructure and technologies at the Nuclotron and other facilities. Design, construction and development of the spin control and polarimetry systems. Consideration of new experiments with polarized beams at the NICA complex |
A.V. Butenko |
2025-2027
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| VBLHEP | A.V. Averyanov, Yu.N. Filatov, V.V. Fimushkin, A.S. Galoyan, D.O. Krivenkov, R.A. Kuzyakin, M.V. Kulikov, V.P. Ladygin, K.S. Legostaeva, A.N. Livanov, N.M. Piskunov, S.G. Reznikov, R.A. Shindin, E.A. Strokovsky |
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| DLNP | Yu.N. Uzikov |
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| MLIT | V.V. Uzhinsky |
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Brief annotation and scientific rationale:
The possibility of obtaining beams of accelerated polarized protons in the Nuclotron without significant investment, demonstrated in 2017, became the basis for the intensification of work on the spin program of the NICA project and, in particular, for the development of polarimetry methods, the creation of new methods of precise control of the direction of the rotation of protons, deuterons and other particles. This part of the work topic is directly related to the creation of the NICA complex and the development of a new approach to operate the polarization in the spin transparency regime. Of undoubted interest is also the study the possibility of setting up the experiments at the upgraded Nuclotron and collider to measure the EDM and parity violation.
The possibility of obtaining beams of accelerated polarized protons in the Nuclotron without significant investment, demonstrated in 2017, became the basis for the intensification of work on the spin program of the NICA project and, in particular, for the development of polarimetry methods, the creation of new methods of precise control of the direction of the rotation of protons, deuterons and other particles. This part of the work topic is directly related to the creation of the NICA complex and the development of a new approach to operate the polarization in the spin transparency regime. Of undoubted interest is also the study the possibility of setting up the experiments at the upgraded Nuclotron and collider to measure the EDM and parity violation.
Expected results upon completion of the activity:
Development of infrastructure for spin research at the Nuclotron-M/NICA complex and other installations. Preparation of technical projects for spin control systems and polarimetry. Analysis of the possibility of setting up new experiments with polarized proton beams and deuterons at the NICA complex, in particular on the search for EDM.
Development of infrastructure for spin research at the Nuclotron-M/NICA complex and other installations. Preparation of technical projects for spin control systems and polarimetry. Analysis of the possibility of setting up new experiments with polarized proton beams and deuterons at the NICA complex, in particular on the search for EDM.
Expected results of the activity this year:
Creation of a project for the placement of elements of polarimetry for beam diagnostics and polarization control in the SPD section of the NICA collider ring. Completion of the upgrade of the polarimeter at the F3 focus.
| 2. | Preparation a project of measurement spin effects in the nucleon-nuclear scattering using modernized movable polarized target and upgraded Delta-Sigma spectrometer |
R.A. Shindin Yu. A. Usov (DNLP) |
2025-2025
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| VBLHEP | A.N. Livanov |
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| DLNP | N.S. Borisov, N.A. Bazhanov |
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| FLNP | A.N. Chernikov |
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Brief annotation and scientific rationale:
Preparation of a project to ьуфыгку spin effects using a proton polarized target and a Delta-Sigma spectrometer. For this purpose, it is necessary to modernize the polarized target in order to create transverse polarization, as well as to carry out design work to create a target environment detector. Expected results upon completion of the activity:
Carrying out work on creating transverse polarization coils for a polarized proton target. Expected results of the activity this year: Preparation of a proposal for an experiment to measure polarization observables in neutron-proton elastic scattering. |
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Brief annotation and scientific rationale: A plan for setting up the experiment with detector systems will be prepared, the required accuracy of signal recording and the possibility of the physical signal selection from the background will be assessed. Test work will be carried out to develop and to manufacture promising detectors and readout electronics systems for them. A letter of intent, conceptual and technical designs for a fixed target experiment with extracted and secondary beams of the Nuclotron, aimed at studying the properties of cold baryonic matter, including spin and polarization effects, will be prepared. Expected results of the activity this year: Development of the detector concept for the implementation of the proposed experimental program. Preparing a letter of intent. |
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4. |
Experiments on the program STRELA at polarized deuteron beam |
N.M. Piskunov |
2025-2027
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| VBLHEP | S.N. Bazylev, A.A. Druzhinin, D.A. Kirillov, R.A. Shindin, I.M. Sitnik |
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Brief annotation and scientific rationale:
Performance of the experimental works on the charge exchange reaction measurements using polarized deuteron beam in the Nuclotron energy range. Expected results upon completion of the activity:
Carrying out measurements on beams of polarized and unpolarized deuterons in the range from 3 to 6 GeV/c Expected results of the activity this year: Preparation of the experimental zone in the focus of F5 of the VP-1 beamline of building 205. |
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| 5. | Theoretical calculations of polarized processes |
V.K. Lukyanov |
2025-2027
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| VBLHEP | A.P. Ierusalimov, N.B. Ladygina |
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Brief annotation and scientific rationale:
Development of theoretical models describing the structure of light nuclei and the interactions of the simplest nuclear systems, taking into account relativism and the contribution of the nucleon-meson and quark-gluon components to the internal motion of constituents in nucleons. Expected results upon completion of the activity:
Description of experimental data on cross sections and polarization observables in reactions involving light nuclei, including those obtained at the Nuclotron/NICA accelerator complex. Expected results of the activity this year:
Description of experimental data on deuteron analyzing powers of deuteron-proton elastic scattering at intermediate energies. Analysis of the energy behavior of the cross section, tensor analyzing power and vector polarization transfer coefficient from deuteron to proton in deuteron-proton backward scattering at Nuclotron energies. |
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Collaboration
| Country or International Organization | City | Institute or laboratory |
| Bulgaria | Sofia | UCTM |
| France | Orsay | IPN Orsay |
| Saclay | IRFU | |
| Japan | Hiroshima | Hiroshima Univ. |
| Wako | RIKEN | |
| Romania | Bucharest | INCDIE ICPE-CA |
| Russia | Belgorod | BelSU |
| Moscow | LPI RAS | |
| NRC KI | ||
| Moscow, Troitsk | INR RAS | |
| LPP LPI RAS | ||
| Slovakia | Bratislava | IP SAS |
| Kosice | IEP SAS | |
| UPJS | ||
| Zilina | UNIZA | |
| Sweden | Uppsala | TSL |
| United Kingdom | Glasgow | U of G |
| USA | Newport News, VA | JLab |
| Norfolk, VA | NSU | |
| Upton, NY | BNL | |
| Williamsburg, VA | W&M | |
| Uzbekistan | Tashkent | Assoc. P.-S. PTI |
| INP AS RUz |
