Preparation of the Neutrino4+ Experiment at the SM-3 Reactor

IF 0.4 4区物理与天体物理 Q4 PHYSICS, MULTIDISCIPLINARY

Moscow University Physics Bulletin Pub Date : 2025-02-20 DOI:10.3103/S0027134924701704

A. P. Serebrov, V. G. Ivochkin, R. M. Samoilov, A. K. Fomin, V. G. Zinoviev, A. V. Vassiljev, S. S. Volkov, V. L. Golovtsov, N. V. Gruzinskii, P. V. Neustroev, V. V. Fedorov, I. V. Parshin, A. A. Gerasimov, M. E. Zaytsev, M. E. Chaikovskii, A. M. Gagarskiy, A. L. Petelin, A. L. Izhutov, M. O. Gromov, S. A. Sazontov, A. A. Tuzov, V. I. Rykalin, D. A. Makarenkov, A. M. Nemeryuk, T. E. Kuzmina

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Abstract

Neutrino-4 experiment observed the effect of neutrino oscillation to a sterile state with 3 standard deviation confedence level. With the aim of a significant increase in the accuracy of the experiment, a second neutrino laboratory is created on the SM-3 reactor (Dimitrovgrad, Russia). The Neutrino-4 collaboration will improve the detector in the first neutrino laboratory also. Equipment for the new neutrino laboratory at the SM-3 reactor is prepared and installation is in progress. Main part of the improvement is a new scintillator with higher gadolinium concentration and doped with DIN to increase pulse shape discrimination abilities. Improvements will allow to increase statistical accuracy of the experiment by 2.7 times and to achieve confidence level of the sterile neutrino observation up to \(5\sigma\).

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SM-3反应堆上中微子4+实验的准备

中微子-4实验以3个标准差的置信水平观察了中微子振荡对无菌状态的影响。为了显著提高实验的准确性，在SM-3反应堆（俄罗斯季米特洛夫格勒）上建立了第二个中微子实验室。中微子-4的合作也将改进第一个中微子实验室的探测器。SM-3反应堆的新中微子实验室设备已经准备就绪，安装工作正在进行中。改进的主要部分是采用一种新的闪烁体，该闪烁体具有较高的钆浓度，并掺杂DIN以提高脉冲形状识别能力。改进将使实验的统计精度提高2.7倍，并使无菌中微子观测的置信度达到\(5\sigma\)。

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来源期刊

Moscow University Physics Bulletin PHYSICS, MULTIDISCIPLINARY-

CiteScore

0.70

自引率

0.00%

发文量

129

审稿时长

6-12 weeks

期刊介绍： Moscow University Physics Bulletin publishes original papers (reviews, articles, and brief communications) in the following fields of experimental and theoretical physics: theoretical and mathematical physics; physics of nuclei and elementary particles; radiophysics, electronics, acoustics; optics and spectroscopy; laser physics; condensed matter physics; chemical physics, physical kinetics, and plasma physics; biophysics and medical physics; astronomy, astrophysics, and cosmology; physics of the Earth’s, atmosphere, and hydrosphere.