A. Mefodiev
A5106123875- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Particle accelerators and beam dynamics
- Nuclear Physics and Applications
- Planetary Science and Exploration
- Atomic and Subatomic Physics Research
- Gyrotron and Vacuum Electronics Research
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Noncommutative and Quantum Gravity Theories
- Age of Information Optimization
- Electron and X-Ray Spectroscopy Techniques
- Particle Accelerators and Free-Electron Lasers
- Advanced NMR Techniques and Applications
- Nuclear physics research studies
- Gamma-ray bursts and supernovae
- Scientific Computing and Data Management
- High-Energy Particle Collisions Research
- Quantum, superfluid, helium dynamics
- X-ray Spectroscopy and Fluorescence Analysis
Institute for Nuclear Research
2015-2024
University of Bern
2023
Albert Einstein College of Medicine
2023
Eötvös Loránd University
2023
Boston University
2018-2023
Duke University
2018-2023
Universidad Autónoma de Madrid
2018-2023
University of California, Irvine
2018-2023
Colorado State University
2021-2023
Russian Academy of Sciences
2021
This paper describes a novel idea of fine-grained fully-active plastic scintillator detector made many optically independent $1\times1\times1~\text{cm}^3$ cubes with readout on three orthogonal projections by wavelength shifting fibers. The original purpose this is to serve as an active neutrino target for the detection, measurement and identification final state particles down few tenths MeV kinetic energies. views well fine granularity ensure powerful localization deposited energy combined...
In June 2012, an Expression of Interest for a long-baseline experiment (LBNO) has been submitted to the CERN SPSC. LBNO considers three types neutrino detector technologies: double-phase liquid argon (LAr) TPC and magnetised iron as far detectors. For near detector, high-pressure gas embedded in calorimeter magnet is baseline design. A mandatory milestone concrete prototyping effort towards envisioned large-scale detectors, accompanying campaign measurements aimed at assessing associated...
In order to extract neutrino oscillation parameters, precision long-baseline experiments rely on detailed models of interactions with nuclei. These constitute an important source systematic uncertainty, partially because detectors date have been blind final state neutrons. Three-dimensional projection scintillator trackers comprise components the near next generation experiments. Due good timing resolution and fine granularity, this technology is capable measuring neutron kinetic energy in...
One of the main goals Long Baseline Neutrino Observatory (LBNO) is to study $L/E$ behaviour (spectral information) electron neutrino and antineutrino appearance probabilities, in order determine unknown CP-violation phase $δ_{CP}$ discover leptonic sector. The result based on measurement probabilities a broad range energies, covering t he 1st 2nd oscillation maxima, at very long baseline 2300 km. sensitivity experiment can be maximised by optimising energy spectra anti-neutrino fluxes. Such...
Abstract The SuperFGD detector will be a novel and important upgrade to the ND280 near for both T2K Hyper-Kamiokande projects. main goal of is reduce systematic uncertainties associated with neutrino flux cross-section modeling future studies oscillations using experiments. upgraded able perform full exclusive reconstruction final state from neutrino-nucleus interactions, including measurements low momentum protons, pions first time, event-by event neutron kinematics. Precisely understanding...
A novel scintillator detector, the SuperFGD, has been selected as main neutrino target for an upgrade of T2K experiment ND280 near detector. The detector design will allow nearly 4{\pi} coverage interactions at and provide lower energy thresholds, significantly reducing systematic errors experiment. SuperFGD is made optically-isolated cubes size 10x10x10 mm^3, providing required spatial resolution to reduce uncertainties future runs. have close two million in a 1920x560x1840 mm^3 volume....
T. Koga1, N. Chikuma1, F. Hosomi1, M. Yokoyama1, A. Bonnemaison2, O. Drapier2, Ferreira2, Gonin2, Th. Mueller2, B. Quilain2, I. Aizenberg3, Izmaylov3, Karpikov3, Khabibullin3, Khotjantsev3, Y. Kudenko3, S. Martynenko3, Mefodiev3, Mineev3, Ovsjannikova3, Suvorov3, Yershov3, Hayashino4, K. Ichikawa4, Minamino4, Nakamura4, Nakaya4, Yoshida4, Seiya5, Wakamatsu5, Yamamoto5, Hayato6 1Department of Physics, University Tokyo, Bunkyo-ku, Japan 2IN2P3-CNRS, Ecole Polytechnique, Palaiseau, France...
T2K (Tokai-to-Kamioka) is a long-baseline neutrino experiment in Japan designed to study various parameters of oscillations. A near detector complex (ND280) located 280 m downstream the production target and measures beam before any oscillations occur. ND280's measurements are used predict number spectra neutrinos Super-Kamiokande at distance 295 km. The difference material between far (water) (scintillator, hydrocarbon) detectors leads main non-cancelling systematic uncertainty for...
The proposed Long Baseline Neutrino Observatory (LBNO) initially consists of $\sim 20$ kton liquid double phase TPC complemented by a magnetised iron calorimeter, to be installed at the Pyhäsalmi mine, distance 2300 km from CERN. conventional neutrino beam is produced 400 GeV protons accelerated SPS accelerator delivering 700 kW power. long baseline provides unique opportunity study flavour oscillations over their 1st and 2nd oscillation maxima exploring $L/E$ behaviour, distinguishing...
The light yield and the time resolution of different types 3 m long scintillating bars instrumented with wavelength shifting fibres read out by models silicon photomultipliers have been measured at a test beam T9 area CERN Proton Synchrotron. results obtained configurations are presented. A better than 800 ps, constant along bar length within 20%, ~ 140 (70) photoelectrons for long, 4.5 (5) cm wide 2 (0.7) thick. These nicely match requirements Muon Detector SHiP experiment.
The Baby MIND spectrometer is designed to measure the momentum and charge of muons from neutrino interactions in water hydrocarbon targets at J-PARC T59 (WAGASCI) experiment. WAGASCI experiment will ratio charged current interaction cross-sections on aiming reducing systematic errors oscillation analyses T2K. Construction detector within CERN Neutrino Platform framework was completed June 2017, where it underwent full commissioning characterization a particle beam line Proton Synchrotron...
The WAGASCI experiment being built at the J-PARC neutrino beam line will measure difference in cross sections from neutrinos interacting with a water and scintillator targets, order to constrain sections, essential for T2K oscillation measurements. A prototype Magnetised Iron Neutrino Detector (MIND), called Baby MIND, is constructed CERN act as magnetic spectrometer behind main target be able charge momentum of outgoing muon charged current interactions.
The T2K (Tokai-to-Kamioka) is a long baseline neutrino experiment designed to study various parameters that rule oscillations, with an intense beam of muon neutrinos. A near detector complex (ND280) used constrain non-oscillated flux and hence predict the expected number events in far (Super-Kamiokande). difference target material between (water) (scintillator, hydrocarbon) detectors leads main non-canceling systematic uncertainty for oscillation analysis. In order reduce this new water grid...
In order to extract neutrino oscillation parameters, precision long-baseline experiments rely on detailed models of interactions with nuclei. These constitute an important source systematic uncertainty, partially because detectors date have been blind final state neutrons. Three-dimensional projection scintillator trackers comprise components the near next generation experiments. Due good timing resolution and fine granularity, this technology is capable measuring neutron kinetic energy in...
Baby MIND is a new downstream muon range detector for the WGASCI experiment. This article discusses distributed readout system and its timing requirements. The paper presents design of synchronization subsystem results test.
Baby MIND is a magnetized iron neutrino detector, with novel design features, and planned to serve as downstream muon spectrometer for the WAGASCI experiment on T2K beam line in Japan. One of main goals this reduce systematic uncertainties relevant CP-violation searches, by measuring contamination anti-neutrino mode T2K. currently being constructed at CERN, be operational Japan October 2017.
WAGASCI is a new experiment at J-PARC neutrino beamline, to measure the cross section ratio of charged current interaction on nucleus between water target and plastic with accuracy few percent. The detector adopts three-dimensional grid structure 3-mm-thick scintillator bars around targets, obtain large angular acceptance. As photodetector 32-channel arrayed MPPC has been developed for detector, total number channels 1280 each module. Our front-end electronics SPIROC2D, product Omega, which...