A5085999053- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Quantum Chromodynamics and Particle Interactions
- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Cosmology and Gravitation Theories
- Neutrino Physics Research
- Computational Physics and Python Applications
- Astrophysics and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Medical Imaging Techniques and Applications
- Radiation Therapy and Dosimetry
- Astro and Planetary Science
- Radiation Detection and Scintillator Technologies
- Superconducting Materials and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Radioactivity and Radon Measurements
- Atomic and Subatomic Physics Research
- Atmospheric Ozone and Climate
- Nuclear Physics and Applications
- Nuclear physics research studies
- Magnetic confinement fusion research
- Particle accelerators and beam dynamics
- Gamma-ray bursts and supernovae
- Scientific Research and Discoveries
Cornell University
2024
University of Massachusetts Amherst
2021-2023
Institute of High Energy Physics
2016-2017
University at Buffalo, State University of New York
2015-2017
National Institute of Technology Tiruchirappalli
2014
The Aerospace Corporation
2009-2012
California Institute of Technology
2001-2009
University of New Mexico
1999-2003
The University of Tokyo
1998
University of Washington
1998
We present the first results of Fermilab Muon g-2 Experiment for positive muon magnetic anomaly $a_\mu \equiv (g_\mu-2)/2$. The is determined from precision measurements two angular frequencies. Intensity variation high-energy positrons decays directly encodes difference frequency $\omega_a$ between spin-precession and cyclotron frequencies polarized muons in a storage ring. ring field measured using nuclear resonance probes calibrated terms equivalent proton spin precession...
We present a new measurement of the positive muon magnetic anomaly, a_{μ}≡(g_{μ}-2)/2, from Fermilab Muon g-2 Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, ω[over ˜]_{p}^{'}, anomalous precession frequency corrected for beam dynamics effects, ω_{a}. From ratio...
The Muon g-2 Experiment at Fermi National Accelerator Laboratory (FNAL) has measured the muon anomalous precession frequency $ω_a$ to an uncertainty of 434 parts per billion (ppb), statistical, and 56 ppb, systematic, with data collected in four storage ring configurations during its first physics run 2018. When combined a precision measurement magnetic field experiment's ring, determines anomaly $a_μ({\rm FNAL}) = 116\,592\,040(54) \times 10^{-11}$ (0.46 ppm). This article describes...
We report on abundance measurements of 10Be, 26Al, 36Cl, and 54Mn in the Galactic cosmic rays (GCRs) using Cosmic-Ray Isotope Spectrometer (CRIS) instrument aboard Advanced Composition Explorer spacecraft at energies from ~70 to ~400 MeV nucleon-1. also an upper limit GCR 14C. The high statistical significance these allows energy dependence their relative abundances be studied. A steady-state, leaky-box propagation model, incorporating observations local interstellar medium (ISM) composition...
The Fermi National Accelerator Laboratory has measured the anomalous precession frequency $a^{}_\mu = (g^{}_\mu-2)/2$ of muon to a combined precision 0.46 parts per million with data collected during its first physics run in 2018. This paper documents measurement magnetic field storage ring. is monitored by nuclear resonance systems and calibrated terms equivalent proton spin spherical water sample at 34.7$^\circ$C. weighted distribution resulting $\tilde{\omega}'^{}_p$, denominator ratio...
We present details on a new measurement of the muon magnetic anomaly, $a_\mu = (g_\mu -2)/2$. The result is based positive data taken at Fermilab's Muon Campus during 2019 and 2020 accelerator runs. uses $3.1$ GeV$/c$ polarized muons stored in $7.1$-m-radius storage ring with $1.45$ T uniform field. value $ a_{\mu}$ determined from measured difference between spin precession frequency its cyclotron frequency. This normalized to strength field, using Nuclear Magnetic Resonance (NMR). ratio...
We report improved measurements of elemental abundances and spectra for galactic cosmic-ray (GCR) nuclei obtained by the Cosmic Ray Isotope Spectrometer on board NASA's Advanced Composition Explorer (ACE) spacecraft during minimum maximum phases solar cycle 23. discuss results particles with nuclear charge 5 ⩽ Z 28 typical energies between 50 500 MeV nucleon−1. demonstrate that a detailed "leaky box" Galactic propagation model combined spherically symmetric modulation gives good (but not...
We present a new measurement of the positive muon magnetic anomaly, $a_\mu \equiv (g_\mu - 2)/2$, from Fermilab Muon $g\!-\!2$ Experiment using data collected in 2019 and 2020. have analyzed more than 4 times number positrons decay our previous result 2018 data. The systematic error is reduced by factor 2 due to better running conditions, stable beam, improved knowledge field weighted distribution, $\tilde{\omega}'^{}_p$, anomalous precession frequency corrected for beam dynamics effects,...
TIG welding is a preferred process for producing quality weld joints. However, because of its characteristic shallow depth penetration, productivity achieved by this low. Depth penetration conventional can be improved Activated (A-TIG) welding. In A-TIG welding, thin layer flux comprising mixtures oxides, fluorides and chlorides applied in the area to welded obtain two three fold increase penetration. study, single component fluxes viz., SiO2, TiO2 Cr2O3 were employed AISI 409 ferritic...
The Relativistic Proton Spectrometer (RPS) on the Radiation Belt Storm Probes spacecraft is a particle spectrometer designed to measure flux, angular distribution, and energy spectrum of protons from ∼60 MeV ∼2000 MeV. RPS will investigate decades-old questions about inner Van Allen belt proton environment: nearby region space that relatively unexplored because hazards operation there difficulties in obtaining accurate measurements an intense penetrating background. provide accuracy needed...
This report summarizes the work of Energy Frontier New Physics working group 2013 Community Summer Study (Snowmass).
This paper presents the beam dynamics systematic corrections and their uncertainties for Run-1 data set of Fermilab Muon g-2 Experiment. Two to measured muon precession frequency $\omega_a^m$ are associated with well-known effects owing use electrostatic quadrupole (ESQ) vertical focusing in storage ring. An average vertically oriented motional magnetic field is felt by relativistic muons passing transversely through radial electric components created ESQ system. The correction depends on...
We present details of a high-accuracy absolute scalar magnetometer based on pulsed proton NMR. The $B$-field magnitude is determined from the precession frequency spins in cylindrical sample water after accounting for field perturbations probe materials, shape, and other corrections. Features design, testing procedures, corrections necessary qualification as an are described. device was tested at $B = 1.45$\,T but can be modified range exceeding 1--3\,T. used to calibrate NMR magnetometers...