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Development
of the FLNR Accelerator Complex
and Experimental Setups
(DRIBs-III)
Leaders:
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I.V. Kalagin
S.I. Sidorchuk
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Deputies:
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V.A.
Semin
A.V. Yeremin
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Scientific
leader:
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Yu.Ts.
Oganessian
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Participating
countries and international organizations:
China,
Egypt, Kazakhstan, Mongolia, Russia, Serbia, South Africa,
India.
The
problem under study and the main purpose of the research:
The
implementation of the DRIBs-III project that includes the upgrade and
development of the FLNR cyclotron complex, expansion of the
experimental infrastructure of the Laboratory (construction of new
physics set-ups), and the development of accelerator systems. The
project aims at improving the operation stability of accelerators,
increasing the intensity and improving the quality of ion beams of
stable and radioactive nuclides in the energy range from 5 to 100
MeV/nucleon, while at the same time reducing power consumption. The
project objective is to significantly improve the efficiency of
experiments on the synthesis of superheavy elements and light nuclei
at nucleon drip lines and study their properties. Moreover, the
programme of experiments with beams of radioactive nuclides is
anticipated to be expanded.
In
addition, the construction of the DC-140 cyclotron for applied
research and commissioning work have continued. The work is carried
out under “The project for the creation of the JINR Innovation
Research Center” as part of “The FLNR research complex
for materials science” project.
Within
the theme quite as important are the support of physics
experiments and the development of existing accelerators and
experimental set-ups.
Projects:
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Name
of the project
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Project
Leaders
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Project
code
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1.
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Construction
of the U-400R
accelerator complex
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I.V.
Kalagin
A.G. Popeko
Deputy:
V.
A. Semin
A.V. Yeremin
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03-5-1129-1-2024/2028
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2.
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Development
of the experimental setups
to study the chemical and
physical
properties of superheavy elements
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A.V.
Yeremin
Deputy:
A.M.
Rodin
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03-5-1129-2-2024/2028
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Projects:
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Name
of the project
Laboratory
(Subdivision)
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Project
Leaders
Responsible
from laboratories
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Status
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1.
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Construction
of the U-400R
accelerator complex
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I.V.
Kalagin
A.G.
Popeko
Deputy:
V.A.
Semin
A.V.
Yeremin
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FLNR
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M.B.
Barbashev, V. Bass, A.A. Bogachev, A.N. Bykov,
O.A.
Chernyshev, I. Franko, K.B. Gikal, Yu. M. Itkis, I.A. Ivanenko,
G.N. Ivanov, N.Yu. Kazarinov, E. А. Klenov, G.N.
Knyazheva,
V.A. Kostyrev, E.M. Kozulin, N.I. Kozulina, A.V.
Kulikov,
K.A. Kulkov, V.I. Lisov, M.I. Makarov, K.V.
Novikov, N.F. Osipov, A.A. Ostroukhov, S.V. Pashchenko, I.V.
Pchelintsev, E.O. Savelieva, A.A. Sidorov, A.A. Suslov, A.V.
Tikhomirov, R.S. Tikhomirov,
R.E. Vaganov, V.A.
Veryovochkin, I.V. Vorobyov, A.S. Zabanov,
S.I. Zagrebayeva,
A.O. Zhukova, S.Yu. Zinchenko
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Brief
annotation and scientific rationale:
The
goal of the project is the construction of the U-400R accelerator
complex for the detailed study of the mechanisms of nuclear
reactions with stable heavy-ion beams (fusion–fission,
quasifission, multinucleon transfer, etc.), synthesis of new
nuclides in these reactions, and decay spectroscopy of nuclei
under investigation.
The
project encompasses such tasks as the construction of a new
experimental hall, the upgrade of the U-400 cyclotron (U-400R
following the modernization), and the construction of new
separators and ion-guide systems for beam transport.
The
accelerator complex will be used for the detailed study of the
properties of the isotopes of heavy and superheavy elements and in
searches for novel methods of synthesizing heavy nuclides. The
studies do not imply the use of radioactive target materials in
amounts exceeding 105Bq.
Expected
results upon completion of the project:
Upgrade
of the U-400 cyclotron (U-400R after the upgrade).
Construction
of a new experimental hall of U-400R.
Construction
of new experimental set-ups and beam transport channels from
U-400R.
Continuation
of the construction and work on commissioning the DC-140
cyclotron for applied research.
Expected
results of the project in the current year:
Completion
of the upgrade and commissioning of the U-400M cyclotron.
Enabling
first experiments.
Development
of the infrastructure of the ACCULINNA-2 fragment separator (RF
kicker, tritium target complex).
Implementation
of the experimental programme at the U-400 cyclotron.
Construction
of the U-400R experimental hall.
Start
of the reconstruction of the U-400 (U-400R) cyclotron.
Development
of a design of the kinematic separator of multinucleon transfer
reaction products.
Development
of the design concepts of the SCIF-D set-up for studying nuclear
reaction mechanisms.
Construction
of the DC-140 cyclotron.
Development
of methods for beam diagnostics of stable and radioactive
nuclides.
Test
launching of the cryogenic gas ion catcher.
Development
of the MAVR spectrometer systems.
2.
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Development
of the experimental setups
to study the chemical and
physical properties
of superheavy elements
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A.V.
Yeremin
Deputy:
A.
M. Rodin
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FLNR
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E.V.
Chernysheva, A. Kohoutova, A.B. Komarov, N.D. Kovrijnykh,
L.
Krupa, V.D. Kulik, D.A. Kuznetsov, A.S. Novoselov, A. Opihal,
O.V. Petrushkin, A.V. Podshibyakin, V.S. Salamatin, V.D.
Shubin,
M.V. Shumeiko, D.I. Soloviev, V.
Yu. Vedeneev, S.A.
Yuhkimchuk
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Brief
annotation and scientific rationale:
Nowadays
acceleration of high-intensity beams at the DC-280 cyclotron (SHE
Factory) provides sufficient statistics in experiments on the
synthesis of superheavy nuclei in the vicinity of the island of
stability (Z=114, N=184), thereby opening up new avenues for
research. Among the new opportunities the SHE Factory offers are
studies of the chemical properties of
short-lived (T1/2<0.5
s) isotopes of superheavy elements and precise measurements of
their masses.
The
project aims to create novel state-of-the-art experimental
instruments. Experimental set-ups to be installed at the DC-280
cyclotron will be used for synthesizing and studying the physical
and chemical properties of the isotopes of heavy and superheavy
elements as well as in studies of nuclear reaction mechanisms, in
nuclear spectrometry and mass spectrometry. To attain these goals,
we are planning to construct a new superconducting gas-filled
GASSOL separator and a multi-reflection time-of-flight mass
spectrometer.
The
magnetic gas-filled separator (GASSOL), whose key element is a
superconducting solenoid magnet, is intended for studying the
physical and chemical properties of superheavy elements, including
their short-lived (T1/2<
0.5 с)
isotopes, thereby establishing a pathway to elements heavier than
Fl. In addition to efficient separation of reaction products, the
separator will focus nuclei of interest into a spot not exceeding
1 cm in diameter.
The
specialized high-resolution mass spectrometer is designed for
measuring the masses of superheavy elements with
Z=104–118
and A=266–294 and their radioactive decay products with an
accuracy of <100 keV. Its principle of operation is based on
the multi-reflection time-of-flight (MR TOF) technique.
Expected
results upon completion of the project:
Development
of methods for producing intensive beams of 48Ca, 50Ti, 54Cr,
etc.
Assembly
of the solenoid magnet of the superconducting gas-filled GASSOL
separator.
Construction
of a multi-reflection time-of-flight mass spectrometer.
Expected
results of the project in the current year:
Enabling
experiments on the synthesis of superheavy elements and study of
their properties at the Superheavy Element Factory.
Construction
of the GASSOL separator for radiochemical studies of superheavy
elements.
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Collaboration
Country
or International Organization
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City
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Institute
or laboratory
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China
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Lanzhou
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IMP
CAS
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Egypt
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Giza
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CU
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Shibin
El Kom
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MU
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India
Kazakhstan
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New
Dehli
Almaty
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IUAC
INP
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Astana
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BA
INP
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ENU
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Mongolia
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Ulaanbaatar
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NRC
NUM
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Russia
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Moscow
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HTDC
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ITEP
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NNRU
“MEPhI”
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Moscow,
Troitsk
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INR
RAS
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Nizhny
Novgorod
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IAP
RAS
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Novosibirsk
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BINP
SB RAS
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Sarov
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VNIIEF
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Snezhinsk
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RFNC-VNIITF
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Saint
Petersburg
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IAI
RAS
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NIIEFA
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Serbia
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Belgrade
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INS
“VINCA”
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South
Africa
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Port
Elizabeth
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NMU
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Somerset
West
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iThemba
LABS
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Stellenbosch
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SU
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Vanderbijlpark
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VUT
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