V. Tishchenko
A5014944356- Particle physics theoretical and experimental studies
- Neutrino Physics Research
- Particle Detector Development and Performance
- Nuclear Physics and Applications
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Muon and positron interactions and applications
- Dark Matter and Cosmic Phenomena
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- Astrophysics and Cosmic Phenomena
- Particle accelerators and beam dynamics
- Quantum Chromodynamics and Particle Interactions
- Inorganic and Organometallic Chemistry
- Atomic and Subatomic Physics Research
- Astronomical and nuclear sciences
- Particle Accelerators and Free-Electron Lasers
- Photochemistry and Electron Transfer Studies
- Scientific Research and Discoveries
- Computational Physics and Python Applications
- Analytical Chemistry and Chromatography
- High-Energy Particle Collisions Research
- Liquid Crystal Research Advancements
- Quantum, superfluid, helium dynamics
- Chemical Synthesis and Reactions
Brookhaven National Laboratory
2015-2024
Brookhaven College
2016-2024
University of California, Santa Cruz
2023
Fermi National Accelerator Laboratory
2017
RIKEN BNL Research Center
2016
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2015
University of Kentucky
2007-2015
United States Department of Energy
2015
James Madison University
2015
Joint Institute for Nuclear Research
1996-2007
The Muon (g-2) Experiment, E989 at Fermilab, will measure the muon anomalous magnetic moment a factor-of-four more precisely than was done in E821 Brookhaven National Laboratory AGS. result appears to be greater Standard-Model prediction by three standard deviations. When combined with expected improvement hadronic contributions, should able determine definitively whether or not is evidence for physics beyond Standard Model. After review of motivation and basic technique, which use storage...
The Mu2e experiment at Fermilab will search for charged lepton flavor violation via the coherent conversion process mu- N --> e- with a sensitivity approximately four orders of magnitude better than current world's best limits this process. experiment's offers discovery potential over wide array new physics models and probes mass scales well beyond reach LHC. We describe herein preliminary design proposed experiment. This document was created in partial fulfillment requirements necessary to...
A new experiment is described to detect a permanent electric dipole moment of the proton with sensitivity $10^{-29}e\cdot$cm by using polarized "magic" momentum $0.7$~GeV/c protons in an all-electric storage ring. Systematic errors relevant are discussed and techniques address them presented. The measurement sensitive physics beyond Standard Model at scale 3000~TeV.
We report a measurement of the positive muon lifetime to precision 1.0 ppm; it is most precise particle ever measured. The experiment used time-structured, low-energy beam and segmented plastic scintillator array record more than 2×1012 decays. Two different stopping target configurations were employed in independent data-taking periods. combined results give τμ+(MuLan)=2 196 980.3(2.2) ps, 15 times as any previous experiment. gives value for Fermi constant: GF(MuLan)=1.166 378 8(7)×10−5...
We present a detailed report of the method, setup, analysis and results precision measurement positive muon lifetime. The experiment was conducted at Paul Scherrer Institute using time-structured, nearly 100%-polarized, surface beam segmented, fast-timing, plastic scintillator array. employed two target arrangements; magnetized ferromagnetic with ~4 kG internal magnetic field crystal quartz in 130 G external field. Approximately 1.6 x 10^{12} positrons were accumulated together data yield...
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...
In recent years, the gain suppression mechanism has been studied for large localized charge deposits in Low-Gain Avalanche Detectors (LGADs). LGADs are a thin silicon detector with highly doped layer that provides moderate internal signal amplification. Using CENPA Tandem accelerator at University of Washington, response different thicknesses to MeV-range energy from proton beam were studied. Three LGAD prototypes 50~$\mu$m, 100~$\mu$m, 150~$\mu$m characterized. The devices' was determined...
The article examines the role of Cossacks Urals in ensuring law enforcement border and interior regions country at end XVIII-XIX centuries. In area direct deployment, irregular army performed duties garrison, cordon, linear protection service, but as need to repel raids steppe nomads decreased, functional responsibilities expanded. Cossack police teams, temporary formations within military organization, were focused on personal property security population a number provinces, guarded fairs,...
The mean life of the positive muon has been measured to a precision 11 ppm using low-energy, pulsed beam stopped in ferromagnetic target, which was surrounded by scintillator detector array. result, tau(micro)=2.197 013(24) micros, is excellent agreement with previous world average. new average 019(21) micros determines Fermi constant G(F)=1.166 371(6)x10(-5) GeV-2 (5 ppm). Additionally, measurement positive-muon lifetime needed determine nucleon pseudoscalar coupling g(P).
The fission probability ${P}_{\mathrm{f}}$ of highly excited targetlike nuclei produced in reactions 2.5 GeV protons on Au, Bi, and U was studied as a function excitation energy ${E}^{*}$ whereby is deduced eventwise from the multiplicity evaporated light particles. At highest 1000 MeV amounts to $\ensuremath{\approx}30%$ with all 3 target irrespective initial fissility. Statistical-model calculations satisfactorily reproduce observed evolution ${E}^{*}$---provided that no extra transient...
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 anomalous magnetic moment of the muon is one most precisely measured quantities in experimental particle physics. Its latest measurement at Brookhaven National Laboratory deviates from Standard Model expectation by approximately 3.5 standard deviations. goal new experiment, E989, now under construction Fermilab, a fourfold improvement precision. Here, we discuss details future and its current status.
Received 7 February 2011DOI:https://doi.org/10.1103/PhysRevLett.106.079901© 2011 American Physical Society
Tuning and narrowing of the emission spectrum a dye laser were achieved for first time when cholesteric liquid crystal was used as selective Bragg reflector. The average frequency this function spectral position reflection maximum oriented layer. varied by altering temperature.
Fermilab is dedicated to hosting world-class experiments in search of new physics that will operate the coming years. The Muon g-2 Experiment one such experiment determine with unprecedented precision muon anomalous magnetic moment, which offers an important test Standard Model. We describe this study accelerator facility deliver a beam experiment. first present lattice design allows for efficient capture, transport, and delivery polarized beams. then numerically examine its performance by...
Background: Heavy charged particles after nuclear muon capture are an important physics background to the muon-to-electron conversion experiments Mu2e and COMET, which will search for lepton flavor violation at unprecedented level of sensitivity.Purpose: The AlCap experiment aimed measure yield energy spectra protons, deuterons, tritons, $\ensuremath{\alpha}$ emitted muons stopped in Al, Si, Ti low-energy range relevant experiments.Methods: Individual particle types were identified layered...