On 19–21 April 2018, the Daya Bay Analysis Workshop is held at the IHEP in Beijing. The results to be presented in the summer are discussed.
Daya Bay is the first experiment to discover disappearance of reactor electron neutrinos because of mixing with the third mass state at the confidence level of more than five standard deviations and the first reactor experiment to measure neutrino mass splitting Δm²₃₂. Up to date, the Daya Bay measurements of both parameters are best in precision. Eight identical detectors, each with 20 t of liquid gadolinium scintillator, are used in the experiment. The detectors are located on three experimental sites and measure the flux and spectrum of electron antineutrinos coming from six nuclear reactors with a total heat power of 17.4 GW. The characteristic distances between the reactors and the detectors are 500 m, 600 m, and 1.5 km.
The workshop on the JUNO Top Tracker at DLNP entered its second day. JINR has been participating in the JUNO collaboration for about three years. In 2020, the reactor neutrino experiment is to be launched in China. Now the construction of the Jiangmen Underground Neutrino Observatory is well under way 150 km away from Hong Kong. The experimental hall will be 700 m underground. The detector filled with 20 000 t of liquid scintillator will be viewed by about 18 000 photomultiplier tubes 20 in. in diameter and 25 000 photomultiplier tubes 3 in. in diameter to detect scintillation light resulting from antineutrino interactions in the detector. The main goal of the experiment is to determine the neutrino mass hierarchy by precision measurement of neutrino oscillations.
Lecture “DLNP Science and Technology Programme” by D.V. Naumov for trainees from the JINR Member States
On 19 April 2018, Dmitri Vadimovich Naumov gave the lecture “DLNP Science and Technology Programme” in the DLNP conference hall for the trainees from the JINR Member States within the framework of the 6th International Practical Training “JINR Experience for the Member States and Partner States” (JEMS). The participants came from Vietnam (University of Dalat, Dalat Nuclear Research Centre), Italy (INFN), Cuba (Cuba’s Isotope Center), Russia (North-Ossetian State University, Moscow Institute of Steel and Alloys), and South Africa (IThemba LABS).
Seminar “Nanoworld of the genes and the genome before and after the radiation “blow” (100 rad = 1 Gy and more)” by Igor Donatovich Aleksandrov
Genetic effect of ionizing radiation on generative cells (gametes) is characterized not only by a diversity of observed changes in individual genes and the genome as a whole but also by the danger that these changes constitute for the coming generations.
The observed diversity stems from both the features of the DNA organization of the nanotarget (gene) and the microtarget (genome) and the character of the ionizing particle energy distribution in these targets. The topics covered at the seminar were modern concepts of the gene and genome DNA organization, energy distribution in the genome (within the modern track structure theory), and the spectrum of primary (theoretically expected0 and observed (from the sequence analysis of radiation-induced mutations) inherited DNA changes.
For more detail see here.
The Using Particle Physics to Understand and Image the Earth is an initiative supported by the International School on Astroparticle Physics (ISAPP), a network including 36 institutions and doctorate schools having the mission of encouraging students exchanges and developing a joint education through the organization of Summer Schools and Summer Institutes in theoretical and experimental Astroparticle Physics.
Congratulations to the NOvA group, a winner of the competition for the Russian Science Foundation (RSF) grants!
On 2 April 2018, winners of the competition for grants in the priority area of RSF activities “Basic scientific research and exploratory scientific research conducted by small research teams” were announced. Among the winners is the DLNP research team headed by Prof. A.G. Olshevsky.
The project “Measurement of neutrino oscillations in the NOvA experiment” supposes participation in solution of fundamentally important problems, such as accurate determination of the neutrino oscillation parameters, determination of the neutrino mass hierarchy, and search for CP violation in the lepton sector.
The DLNP Directorate heartily congratulates the winners of the competition and wishes the team further success and achievements!
A regular winter expedition to Lake Baikal has come to an end. The first clusters are fully repaired. The third cluster is put into operation. All the work needed for installation of three clusters is done. This will allow 2–3 clusters to be installed during the next expeditions.
Igor Romanovich Boiko did a review of the currently projected electro–positron colliders and physical researches at them
The LHC experiments have yielded a great deal of results, the most remarkable of which is the discovery of the Higgs boson. Nevertheless, new experiments are needed to establish the most fundamental principles governing the structure of the Universe.