A5010110303- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear reactor physics and engineering
- Nuclear physics research studies
- Nuclear Physics and Applications
- Atomic and Subatomic Physics Research
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Stochastic processes and statistical mechanics
- Particle Accelerators and Free-Electron Lasers
- X-ray Spectroscopy and Fluorescence Analysis
- Fusion materials and technologies
- Quantum, superfluid, helium dynamics
- Neutrino Physics Research
- Markov Chains and Monte Carlo Methods
- Statistical Methods and Bayesian Inference
- Particle Detector Development and Performance
- Muon and positron interactions and applications
- Magnetic confinement fusion research
- Advanced Chemical Physics Studies
- Dark Matter and Cosmic Phenomena
- Laser-Plasma Interactions and Diagnostics
- Theoretical and Computational Physics
Moscow Engineering Physics Institute
2014-2024
Petersburg Nuclear Physics Institute
2014-2024
Kurchatov Institute
2016-2024
ITMO University
2024
Panjab University
2023
Abilene Christian University
2020-2023
Istituto Nazionale di Fisica Nucleare, Sezione di Ferrara
2018-2022
Joint Institute for Nuclear Research
2022
Institute of Engineering Physics
2007-2021
Variable Energy Cyclotron Centre
2020
The rate of nuclear muon capture by the proton has been measured using a new technique based on time projection chamber operating in ultraclean, deuterium-depleted hydrogen gas, which is key to avoiding uncertainties from muonic molecule formation. hyperfine singlet ground state μp atom was obtained difference between μ− disappearance and world average for μ+ decay rate, yielding ΛS=725.0±17.4 s−1, induced pseudoscalar coupling nucleon, gP(q2=−0.88m2μ)=7.3±1.1, extracted.Received 16 April...
The MuCap experiment at the Paul Scherrer Institute has measured rate L_S of muon capture from singlet state muonic hydrogen atom to a precision 1%. A beam was stopped in time projection chamber filled with 10-bar, ultra-pure gas. Cylindrical wire chambers and segmented scintillator barrel detected electrons decay. is determined difference between mu- disappearance free decay rate. result based on analysis 1.2 10^10 decays, which we extract = (714.9 +- 5.4(stat) 5.1(syst)) s^-1 derive...
Isotopic purification of the protium and deuterium is an important requirement many physics experiments. A cryogenic facility for high-efficiency separation hydrogen isotopes with a distillation column as main element described. The instrument portable, so that it can be used at experimental site. It was designed built Petersburg Nuclear Physics Institute, Gatchina, Russia. Fundamental operating parameters have been measured including liquid holdup in packing, pressure drops across purity...
Background: The rate \lambda_pp\mu\ characterizes the formation of pp\mu\ molecules in collisions muonic p\mu\ atoms with hydrogen. In measurements basic weak muon capture reaction on proton to determine pseudoscalar coupling g_P, occurs from both atomic and molecular states. Thus knowledge is required for a correct interpretation these experiments. Purpose: Recently MuCap experiment has measured \Lambda_S singlet atom, employing low density active target suppress (PRL 110, 12504 (2013))....
The preservation of the nuclear polarization hydrogen atoms during recombination to molecules was observed on different surface materials in temperature range from 45 100 K and for magnetic fields up 1 T. On a gold fused quartz surface, expected molecular about 50% or lower atomic measured, while layer perfluoropolyether (Fomblin) shows nearly complete (at least 97%) process. Further experiments have possibility storing polarized deuterium use them nuclear-fusion installations. Another...
Lamb-shift polarimeters are used to measure the nuclear polarization of protons and deuterons at energies a few keV. In combination with an ionizer, hydrogen deuterium atoms was determined after taking into account loss during ionization process. The present work shows that or molecules can be measured as well, by ionizing injecting \documentclass[12pt]{minimal}\begin{document}$H_2^+$\end{document}H2+ (or \documentclass[12pt]{minimal}\begin{document}$D_2^+$\end{document}D2+) ions polarimeter.
We propose to use an internal polarized hydrogen storage cell gas target in the AD ring determine for first time two total spin-dependent pbar-p cross sections sigma_1 and sigma_2 at antiproton beam energies range from 50 450 MeV. The data obtained are of interest by themselves general theory interactions since they will provide a experimental constraint spin-spin dependence nucleon-antinucleon potential energy interest. In addition, measurements polarization buildup stored antiprotons...
We present an experiment to measure the spin-correlation coefficients for double-polarized deuteron-fusion in energy range of 10–100 keV determine quintet suppression factor. The setup and future upgrade plans are described. possible gain thermonuclear fusion reactors is discussed as well.
A: The study of DD reactions, especially with polarized reactants, helps for better understanding the processes taking place in nuclear astrophysics and fusion reactors.At PNPI Gatchina, Russia, PolFusion experiment crossing two beams, i.e. a deuteron deuterium beam, is able to measure angular distributions differential cross section and, therefore, spin-correlations coefficients different combinations adjustable polarization both beams center-of-mass energy between 10 100 keV.Some...
Polarized atomic beam sources have been in operation for many years to produce either nuclear polarized hydrogen or deuterium beams. In recent experiments, such a source was used polarize both isotopes independently at the same time. By recombination of atoms, hydrogen-deuterium molecules with all possible spin combinations can be created. Those isomers are useful further applications, like precision spectroscopy, as targets laser-particle acceleration, fuel fusion reactors, an option future...
We report on the design, construction, and magnetic field measurements of a system high sextupole magnets made from NdFeB compounds. The are utilized as focusing for neutral hydrogen (or deuterium) atoms in polarized atomic beam source based Stern–Gerlach spin separation. Each magnet consists 24 segments permanently magnetized material differing remanence coercivity to reduce demagnetization. According quadratic extrapolation pole tip flux density reaches values up B0=1.69 T....
The central detector in the MuSun experiment is a pad-plane time projection ionization chamber that operates without gas amplification deuterium at 31 K; it used to measure rate of muon capture process μ−+d→n+n+νμ. A new charge-sensitive preamplifier, operated 140 K, has been developed for this detector. It achieved resolution 4.5 keV(D2) or 120 e− RMS with zero capacitance 1.1 μ s integration laboratory tests. In experimental environment, electronic 10 250 0.5 time. excellent energy...
The Deuterium Removal Unit (DRU) has been designed and built at the Petersburg Nuclear Physics Institute (PNPI) to produce isotopically pure hydrogen with deuterium content less than 1 ppm. cryogenic distillation column of 2.2 cm inner diameter 155 packing height is main element DRU. Column performances different operating modes have measured. equivalent theoretical plate (HETP) for almost constant over a wide range vapour flow rates. depleted 0.1 ppm was produced in required quantity.