Frank Laboratory of Neutron Physics is one of the laboratories of the Joint Institute for Nuclear Research (Dubna, Russia) that investigates the neutron as an elementary particle using various instruments, and employs the neutron as an instrument to investigate the structure and dynamics of condensed matter, including crystals and nanosystems, functional materials, complex liquids and polymers, rocks, etc. so that our findings could find application in molecular biology and pharmacology, engineering diagnostics and in other fields of science and technology.
IBR-2 Status OFF
The operation of the IBR-2 reactor and access to its experimental instruments have been suspended until September 2023
Events
DSC SEMINAR, May 24, 2022, (Thuesday), 10:00, Conference hall (bldg. 119, 3rd floor)
"Signal Simulator of Spectrometer Detectors at the HRFD of the IBR-2M Reactor"
V. V. Shvetsov, N. V. Gorbunov, V. A. Drozdov
Almost the whole complex of spectrometers of the IBR-2M reactor is equipped with MPD data acquisition electronic system developed at FLNP and designed for processing and accumulating data from an array of point neutron detectors. In accordance with the development programmes of spectrometers, with an increase in the number of detector beamlines and neutron flux, requirements for data acquisition systems are increased. Currently, a new data acquisition system based on MPD-32 units is under development and debugging at FLNP. However, as a result of the shutdown of the reactor for a long period, complete tests of the MPD-32 system on spectrometers are impossible.
The aim of this paper was to develop a test stand with a simulator of reactor signals, choppers and detectors for the data acquisition system on the HRFD spectrometer of the IBR-2M reactor. Such a system will allow testing and complex debugging of the data acquisition system under laboratory conditions. The test stand provides generating of signals of a multichannel detector system with simulation of a typical time-of-flight spectrum of thermal neutrons at HRFD, FSD and other facilities. To estimate the maximum data acquisition rate of the MPD-32 system, the stand provides simulation of adjustable flux intensity for 32 detector signals and neutron chopper signals.
FLNP STC, May 19 (Thursday), 2022, at 11:00, FLNP Conference Hall (3-rd floor)
Agenda:
1. Report and proposal for prolongation of the project TANGRA.
Speaker: Yu. N. Kopatch
2. Report and proposal for prolongation of the project "Modernization of the EG-5 accelerator and development of its experimental infrastructure".
Speaker: A. S. Doroshkevich
3. Report and proposal for prolongation of the project "Emission of Neutrons and Gamma-quanta in Reactions Induced by Neutrons (ENGRIN)".
Speaker: Sh. S. Zeinalov
4. Elections for the positions of:
4.1. A researcher, SINNI DNP FLNP
Applicant: N.A. Fedorov
4.2. A researcher, DNICM DCMRD FLNP
Applicant: M. Erdauletov
5. Miscellaneous.
DNP Seminar, June 1 (Wednesday), 2022, 11:00, FLNP Conference Hall (3rd floor)
"Pneumatic transport system REGATA-2 at the IREN facility"
Lobachev V.V., Dmitriev A. Yu., Borzakov S.B., Smironov A.A., Zhironkin I.S., Shvetsov V.N.
The IREN facility makes it possible to obtain neutrons or gamma quanta, depending on the type of target used. The REGATA-2 pneumatic transport system was developed at the Bulgarian Academy of Sciences for the applied use of neutron or photon fluxes. The project was successfully implemented at FLNP IREN facility.
The pneumatic transport system provides studies of the elemental composition of various origins samples, including short-lived isotopes with a half-life of about one minute or more. With the help of neutron activation analysis, ceramics were studied using short-lived isotopes, which significantly expanded the picture of the elemental composition of the samples. The first experiments on the use of gamma activation analysis were carried out, during which the isotopes in the irradiated samples were qualitatively determined. Currently, an active modernization of the pneumatic transport system is being carried out – a touch control panel has been implemented, which will completely replace the electromechanical one, interaction has been established with the activation analysis database.
This report will present an overview of functional blocks of the pneumatic transport system, their finalization and implementation at the IREN facility, the results of experiments on neutron and gamma activation analysis, steps to modernize the pneumatic transport system, the implementation of new options and proposals for the improvement of the methods used.
TOPICAL SEMINAR on the structure and dynamics of crystals, May 17 (Tuesday), 2022, at 15:00, DNICM FLNP Conference hall, (bldg. 42a of FLNP)
"Unusual magnetism in rare-earth ion systems with strong electronic correlations"
Savchenkov P. S. (NRC "Kurchatov Institute", Moscow, Russia)
The results of neutron research of the characteristic features of electronic states in systems of rare-earth ions with strong electronic correlations are discussed in the report.
It is shown how the effects of the crystal field, exchange interaction and hybridization between localized and band electrons, as well as their mutual competition lead to the implementation of "exotic" magnetic states: "induced" magnetism and the coexistence of a long-range magnetic order with strong spin fluctuations. In particular, features of magnetism are described in systems of rare-earth ions with a singlet ground state: EuCu2Si2, PrNi, SmB6. The development of theoretical and model concepts for interpreting the results obtained is presented.
DNP STC, May 11 (Wednesday), 2022, at 11:00, FLNP Conference Hall (3-rd floor)
Agenda:
1. Report and proposal for prolongation of the project TANGRA.
Speaker: Yu. N. Kopatch
2. Report and proposal for prolongation of the project "Modernization of the EG-5 accelerator and development of its experimental infrastructure".
Speaker: A. S. Doroshkevich
3. Report and proposal for prolongation of the project "Emission of Neutrons and Gamma-quanta in Reactions Induced by Neutrons (ENGRIN)".
Speaker: Sh. S. Zeinalov
4. Miscellaneous.
News
Competition selection in 2022 for personal scholarships named after Zh. I. Alferov for young scientists in the field of physics and nanotechnology
The Ministry of Science and Higher Education of Russia, together with the Council for Grants of the President of the Russian Federation, announces a competition selection in 2022 for personal scholarships named after Zh. I. Alferov for young scientists in the field of physics and nanotechnology. Registration of participants of the competition will be open from 12:00 AM 19 April to 2:00 PM 19 May, 2022. For registration and more details, please see: https://grants.extech.ru/
Candidates for the competition are nominated by the Science and Technology Council or the Scientific Council of JINR. FLNP candidates should first be heard and recommended by STC FLNP. The next meeting of STC FLNP will be held on 29 April (Friday) 2022, at 3:00 PM in the Conference Hall of FLNP JINR (bldg. 119, 3rd floor).
Condensed Matter Research at the IBR-2 to be discussed at FLNP conference
From 25 to 29 April 2022, the Frank Laboratory of Neutron Physics of the Joint Institute for Nuclear Research in Dubna will hold the International Conference “Condensed Matter Research at the IBR-2”.
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On January 26, 2022, the JINR Scientists' House hosted the solemn presentation of diplomas of doctors and candidates of sciences
On January 26, 2022, the JINR Scientists' House hosted the solemn presentation of diplomas of doctors and candidates of sciences to applicants who successfully defended their dissertations in the Dissertation Councils at the FLNP and DLNP. The Chairman of the JINR Qualification Commission Victor A. Matveev participated in the awarding ceremony. Among the eight awarded diplomas, four are DNICM FLNP researchers. Two new Doctors of Sciences appeared in the Laboratory: Doctor of Physical and Mathematical Sciences Tropin T.V. and doctor of technical science Kichanov S.E. Among the new certified candidates - Belozerova N.M. and Zhaketov V.D. The scope of scientific interests of employees is diverse: from nanocomposites, fullerenes, magnetic multilayer structures, and complex functional materials to the creation of techniques and methods for neutron radiography and tomography at the IBR-2 pulsed reactor. We congratulate the newly "baked" doctors and candidates of sciences and wish them further creative achievements in their chosen scientific areas.
In the photo: Doctor of Technical Sciences Sergey E. Kichanov, Candidate of Physical and Mathematical Sciences Nadezhda M. Belozerova, Scientific Secretary of the Dissertation Council at the FLNP Tatyana I. Ivankina, Doctor of Physical and Mathematical Sciences Timur V. Tropin, Chairman of the JINR Qualification Commission Academician Victor A. Matveev, Candidate of Physical and Mathematical Sciences Vladimir D. Zhaketov.
Successful defense by Vadim Sikolenko
We are happy to congratulate the senior researcher of our laboratory Vadim Sikolenko on the defense of his doctoral dissertation!
Competition of scientific and scientific-methodical works is announced
Prizes are awarded by sections:
1) scientific research works in nuclear physics;
2) scientific research works in condensed matter physics;
3) applied and scientific-methodical works;
4) other experimental works.
To take part in the competition, you have to send published works (annotations should be included just for the cycle of works) to the scientific secretary (This email address is being protected from spambots. You need JavaScript enabled to view it.) until10 am on January 25, 2022. The email must include the title of work or cycle of works in Russian and English as well as the names and surnames of all co-authors in Russian and English. The competition accepts works published or accepted for publication before December 31, 2021.