T. E. Chupp
A5090102172- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Quantum, superfluid, helium dynamics
- Particle physics theoretical and experimental studies
- Advanced NMR Techniques and Applications
- Nuclear physics research studies
- Radiation Detection and Scintillator Technologies
- Quantum Chromodynamics and Particle Interactions
- Cold Atom Physics and Bose-Einstein Condensates
- Dark Matter and Cosmic Phenomena
- Advanced MRI Techniques and Applications
- Advanced Frequency and Time Standards
- Neutrino Physics Research
- Nuclear reactor physics and engineering
- Superconducting Materials and Applications
- High-Energy Particle Collisions Research
- Radioactive Decay and Measurement Techniques
- Particle accelerators and beam dynamics
- Atomic and Molecular Physics
- Particle Detector Development and Performance
- Radiation Therapy and Dosimetry
- Cold Fusion and Nuclear Reactions
- Spacecraft and Cryogenic Technologies
- Medical Imaging Techniques and Applications
- Laser Design and Applications
Michigan United
2008-2024
University of Michigan–Ann Arbor
2014-2023
Los Alamos National Laboratory
2020
University of Washington
1981-2015
Ann Arbor Center for Independent Living
1997-2013
Emerald Coast Science Center
2008-2009
National Institute of Standards and Technology
2000-2008
Harvard University Press
1987-1994
Smithsonian Astrophysical Observatory
1994
Harvard University
1988-1993
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...
The spin structure function of the neutron gn1 has been determined over range 0.03<x<0.6 at an average Q2 2 (GeV/c)2 by measuring asymmetry in deep inelastic scattering polarized electrons from a 3He target energies between 19 and 26 GeV. integral is found to be F10gn1(x)dx=-0.022±0.011. Earlier reported proton results together with Bjorken sum rule predict F10gn1(x)dx=-0.059±0.019.Received 1 April 1993DOI:https://doi.org/10.1103/PhysRevLett.71.959©1993 American Physical Society
Measurements are reported of the proton and deuteron spin structure functions ${g}_{1}^{p}$ ${g}_{1}^{d}$ at beam energies 29.1, 16.2, 9.7 GeV, ${g}_{2}^{p}$ ${g}_{2}^{d}$ a energy 29.1 GeV. The integrals ${\ensuremath{\Gamma}}_{p}={\ensuremath{\int}}_{0}^{1}{g}_{1}^{p}{(x,Q}^{2})dx$ ${\ensuremath{\Gamma}}_{d}={\ensuremath{\int}}_{0}^{1}{g}_{1}^{d}{(x,Q}^{2})dx$ were evaluated fixed ${Q}^{2}=3(\mathrm{GeV}{/c)}^{2}$ using full data set to yield...
The existence of a nonvanishing electric dipole moment for an elementary particle, atom or molecule, would indicate violation time reversal symmetry and parity-symmetry violation. latter could help resolve the question observed matter-antimatter asymmetry in Universe. This review provides broad overview theoretical motivations interpretations as well details about experimental techniques, experiments, prospects.
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 a precision measurement of the neutron spin structure function ${g}_{1}^{n}$ using deep inelastic scattering polarized electrons by ${}^{3}\mathrm{He}$. For kinematic range $0.014<x<0.7$ and $1<{Q}^{2}<17(\mathrm{GeV}/c{)}^{2}$, we obtain $\ensuremath{\int}{0.014}^{0.7}{g}_{1}^{n}(x)dx\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\ensuremath{-}0.036\ifmmode\pm\else\textpm\fi{}0.004(\mathrm{stat})\ifmmode\pm\else\textpm\fi{}0.005(\mathrm{syst})$ at an average...
We have measured the ratio $\frac{{g}_{1}^{p}}{{F}_{1}^{p}}$ over range $0.029<x<0.8$ and $1.3<{Q}^{2}<10$ ${(\mathrm{G}\mathrm{e}\mathrm{V}/\mathit{c})}^{2}$ using deep-inelastic scattering of polarized electrons from ammonia. An evaluation integral $\ensuremath{\int}{0}^{1}{g}_{1}^{p}(x, {Q}^{2})\mathrm{dx}$ at fixed ${Q}^{2}=3$ yields 0.127\ifmmode\pm\else\textpm\fi{}0.004(stat)\ifmmode\pm\else\textpm\fi{}0.010(syst), in agreement with previous experiments, but well below Ellis-Jaffe sum...
The neutron longitudinal and transverse asymmetries A1n A2n have been extracted from deep inelastic scattering of polarized electrons by a He3 target at incident energies 19.42, 22.66, 25.51 GeV. measurement allows for the determination spin structure functions g1n(x, Q2) g2n(x, over range 0.03<x<0.6 an average Q2 2 (GeV/c)2. data are used evaluation Ellis-Jaffe Bjorken sum rules. function is small negative within our measurement, yielding integral ∫0.030.6g1n(x)dx=−0.028±0.006 (stat)±0.006...
We report on a high-statistics measurement of the deuteron spin structure function ${g}_{1}^{d}$ at beam energy 29 GeV in kinematic range $0.029<x<0.8$ and $1<{Q}^{2}<10$ (GeV $/c$${)}^{2}$. The integral ${\ensuremath{\gamma}}_{1}^{d}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}\ensuremath{\int}{1}^{}{g}_{1}^{d}\mathrm{dx}$ evaluated fixed ${Q}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}3$ $/c$${)}^{2}$ gives...
We have measured the T-odd permanent electric dipole moment of 129Xe with spin exchange pumped masers and a 3He comagnetometer. The comagnetometer provides direct measure several systematic effects that may limit sensitivity, we directly changes in leakage current result when applied field is changed. Our result, d(129Xe) = 0.7+/-3.3(stat)+/-0.1(syst)x10(-27)e cm, fourfold improvement sensitivity.
We have performed a test of Lorentz invariance by searching for time-dependent quadrupole splitting Zeeman levels in $^{21}\mathrm{Ne}$. A component the at twice Earth's sidereal frequency (${\mathrm{\ensuremath{\Omega}}}_{\mathrm{S}}$) would suggest preferred direction which affects local physics $^{21}\mathrm{Ne}$ nucleus. The technique employs polarized and $^{3}\mathrm{He}$ gases produced spin exchange with laser optically pumped Rb. Both species are contained same glass cell, providing...
The Proceedings of the 2011 workshop on Fundamental Physics at Intensity Frontier. Science opportunities intensity frontier are identified and described in areas heavy quarks, charged leptons, neutrinos, proton decay, new light weakly-coupled particles, nucleons, nuclei, atoms.
We perform a global analysis of searches for the permanent electric dipole moments (EDMs) neutron, neutral atoms, and molecules in terms six leptonic, semileptonic, nonleptonic interactions involving photons, electrons, pions, nucleons. By translating results into fundamental charge-conjugation-parity symmetry (CP) violating effective through dimension standard model particles, we obtain rough lower bounds on scale beyond CP-violating ranging from 1.5 TeV electron EDM to 1300 nuclear...
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...
The applications of spin-based quantum sensors to measurements probing fundamental physics are surveyed. Experimental methods and technologies developed for information science have rapidly advanced in recent years these tools enable increasingly precise control measurement spin dynamics. Theories beyond-the-standard-model predict, example, discrete-symmetry-violating electromagnetic moments correlated with particle spins, exotic spin-dependent forces, coupling spins ultralight bosonic...
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...
New measurements are reported on the deuteron spin structure function g_1^d. These results were obtained from deep inelastic scattering of 48.3 GeV electrons polarized deuterons in kinematic range 0.01 < x 0.9 and 1 Q^2 40 (GeV/c)^2. first high dose electron data using lithium deuteride (6Li2H) as target material. Extrapolations performed to obtain moments g_1^d, including Gamma_1^d, net quark polarization Delta Sigma.
We present a detailed experimental study of the physics involved in transferring atoms from magneto-optical trap (MOT) to an optical dipole trap. The loading is dynamical process determined by rate and density dependent loss rate. depends on cooling flux into trapping volume, due excited state collisions induced MOT light fields. From this we found ways optimize Key ingredients for maximum are be reduction hyperfine repump intensity, increased detuning light, displacement center with respect...
Abstract The feasibility of brain MRI with laser‐polarized 129 Xe in a small animal model is demonstrated. Naturally abundant polarized and introduced into the lungs Sprague‐Dawley rats. Polarized xenon gas dissolves blood transported to where it accumulates tissue. Spectroscopic studies reveal single, dominant, tissue‐phase NMR resonance head at 194.5 ppm relative phase resonance. Images rat were obtained 98‐μl voxels by 2D chemical shift imaging show that localized brain. This work...
Simple formulas for the neutron and proton polarizations in polarized $^{3}\mathrm{He}$ targets are derived assuming (1) quasielastic final states; (2) no final-state interactions; (3) meson-exchange currents; (4) large momentum transfers; (5) factorizability of SU(4) response-function components. Numerical results from a wide variety bound-state solutions Faddeev equations presented. It is found that this simple model predicts polarization neutrons fully target to be 87%, while protons...
We have measured proton and deuteron virtual photon-nucleon asymmetries ${A}_{2}^{p}$ ${A}_{2}^{d}$ structure functions ${g}_{2}^{p}$ ${g}_{2}^{d}$ over the range $0.03<x<0.8$ $1.3<{Q}^{2}<10(\mathrm{GeV}/c{)}^{2}$ by inelastically scattering polarized electrons off ammonia targets. Results for ${A}_{2}$ are significantly smaller than positivity limit $\sqrt{R}$ both Within experimental precision ${g}_{2}$ data well described twist-2 contribution, ${g}_{2}^{\mathrm{WW}}$. Twist-3 matrix...
The technique of spin exchange between laser optically pumped alkali-metal vapor and $^{3}\mathrm{He}$ can provide several atm ${\mathrm{cm}}^{\mathrm{\ensuremath{-}}3}$ (\ensuremath{\approxeq}${10}^{21}$ atoms in a volume 6 ${\mathrm{cm}}^{3}$) nearly 100% polarized $^{3}\mathrm{He}$. We have recently produced 40% polarization ${10}^{20}$ (3 1.3 ${\mathrm{cm}}^{3}$). It should therefore be possible to produce useful targets by this technique. realization practical target is limited the...