News
25.12.2019
At the beginning of December 2019, the cryostat for obtaining ultra-low temperatures, developed and produced under the guidance of Yuri Andreyevich Usov in the DLNP Sector of Low Temperatures, was transported to the JINR customs warehouse. The cryostat is an important part of a new frozen polarized target for polarization experiments at the ELSA accelerator of the University of Bonn. This polarized target is being created in cooperation between DLNP and two universities (in Bonn and Mainz) for conducting double polarization experiments (beam + target). The studies are performed within the Crystal Barrel collaboration.
25.12.2019
Last Friday, the 70th anniversary of the launch of the JINR Synchrocyclotron was celebrated. At the festive lunch, heroic creators of the Synchrocyclotron, all veterans of the Laboratory of Nuclear Problems were honoured. The whole history of the oldest JINR laboratory, all achieved and world-recognized results of its scientific staff, considerable experience accumulated in the fields of nuclear physics, high-energy physics, condensed matter physics – all this is closely connected with the launch and long-term successful operation of the Synchrocyclotron in Dubna.
24.12.2019
“Studies of Geodynamics and Possibilities of Predicting Earthquakes in Armenia. Laser-Inclinometer Observations in Armenia Aimed at Investigating the Stress-Strain State of the Earth’s Crust”
18.12.2019
Lyudmila Kolupayeva
Anton Dolzhikov
17.12.2019
Spin physics is an intricate and fascinating chapter in HEP phenomenology. It seems inevitable that, in order to probe spin-parity properties of hadrons and their interactions, one needs either to collide polarized initial particles or to study non-trivial angular distributions in exclusive processes. I will argue that it is possible to probe spin- and parity-dependent observables in inclusive processes with unpolarized particles — provided, they are prepared in a "twisted" state, that is, a non-plane-wave state equipped with a non-zero orbital angular momentum with respect to its propagation direction.
17.12.2019
On December 6, 2019, the defense of the Candidate of Science dissertation in Physics and Mathematics by Danila Kozhevnikov “Development of the multi-energy X-ray tomography method using detectors based on microchips of the Medipix family”, specialty 01.04.01 – “Instruments and Methods of Experimental Physics”, took place at the session of the Dissertation Council D 003.016.03 of Budker Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences (Novosibirsk).
Our congratulations to Danila on the successful defense! Further scientific achievements and good luck!
11.12.2019
Applicability limits of the Standard Model (SM) of electroweak interactions and search for novel phenomena beyond the SM which indicate existence of new physics are issues of great importance in modern Elementary Particle Physics. Along with the search for and investigations of new processes at the recently created accelerators, the signals of this new physics could be found during a close high-precision research of well-known processes, including rare ones.
26.11.2019
Machine Learning algorithms, especially the computational intense artificial neural networks, have shown great success in the analysis and prediction of big data sets in recent years. This has driven the development of a data analysis ecosystem in Python, which lead to the appearance of several deep learning libraries, TensorFlow being one of the most prominent ones. Those frameworks specialize on efficient, large scale numerical computations while being lightweight to use. While their main purpose is the building and training of neural networks, they are also used in a wider array of computational intense tasks. An example of such is likelihood model fitting in High Energy Physics as done by the zfit project and other libraries.
12.11.2019
This week, new members of the Russian Academy of Sciences were elected. The title of the RAS Academician was awarded to a senior researcher of the Electron Cooling Sector of our Laboratory, a RAS corresponding member, Professor Igor Nikolayevich Meshkov.
Igor Nikolayevich Meshkov is a world-famous scientist in the field of charged-particle beam physics, accelerator physics and equipment, high-energy physics, plasma physics and radiation methods of material treatment. He became renowned for the discovery and development of the electron cooling method. He first began his studies at the Institute of Nuclear Physics of the Siberian Branch of the Russian Academy of Sciences (SB RAS) where he grew from a senior lab assistant to the head of the laboratory. His investigations were continued both at the SB RAS Centre of Physics and Technology established under his leadership in Lipetsk and at the Joint Institute for Nuclear Research in Dubna.
His ideas and inventions are still in use within charge-particle storage rings with electron cooling at different facilities. He participated in the development of the electron cooling system and in the experiments at the LEAR antiproton storage ring at CERN (Switzerland), at Fermilab (US), at the COSY synchrotron at the Research Centre in Jülich (Germany), and at the HIMAC medical synchrotron in Japan. For his pioneering studies in the area of cooling, I.N. Meshkov was awarded the State Prize of the Russian Federation.
06.11.2019
Authors: V.I. Komarov, B. Baymurzinova, A. Kunsafina, D.A. Tsirkov (Dzhelepov Laboratory of Nuclear Problems, JINR).The nucleon collisions with the impact parameter less than the radius of the nucleon quark core were discussed at the seminar. The selection criteria of these collisions from the full data set in nucleon-nucleon interaction events were proposed.
30.10.2019
At the seminar, the computation of the full one-loop electroweak radiation correction for the process e+e-\to Z\gamma in the ARIeL project is presented. The calculations were done taking into account all the masses. The polarization effects in the experiments CLIC, ILC, FCC-ee, CEPC by the generator MCSANCee are evaluated.
