A5034996982- Quantum Chromodynamics and Particle Interactions
- Particle physics theoretical and experimental studies
- Nuclear physics research studies
- Atomic and Subatomic Physics Research
- High-Energy Particle Collisions Research
- Quantum, superfluid, helium dynamics
- Electrical Fault Detection and Protection
- Advanced NMR Techniques and Applications
- Integrated Circuits and Semiconductor Failure Analysis
- Risk and Safety Analysis
- Occupational Health and Safety Research
- Solar and Space Plasma Dynamics
- Advanced MRI Techniques and Applications
- Machine Fault Diagnosis Techniques
- Advanced Chemical Physics Studies
- Particle Accelerators and Free-Electron Lasers
- NMR spectroscopy and applications
- Dark Matter and Cosmic Phenomena
- Fluid Dynamics and Turbulent Flows
- Medical Imaging Techniques and Applications
- Superconducting Materials and Applications
- Atomic and Molecular Physics
- Ocular and Laser Science Research
- Railway Engineering and Dynamics
- Nausea and vomiting management
Liaoning Technical University
2017-2025
Xi'an Aeronautical University
2024
Triangle Universities Nuclear Laboratory
2005-2023
Duke University
2005-2023
Center for Child and Family Health
2023
Massachusetts Institute of Technology
1999-2021
William & Mary
2020
Williams (United States)
2020
Southwest Jiaotong University
2020
Fujian Medical University
2019
This White Paper presents the science case of an Electron-Ion Collider (EIC), focused on structure and interactions gluon-dominated matter, with intent to articulate it broader nuclear community. It was commissioned by managements Brookhaven National Laboratory (BNL) Thomas Jefferson Accelerator Facility (JLab) objective presenting a summary scientific opportunities goals EIC as follow-up 2007 NSAC Long Range plan. document is culmination community-wide effort in following series workshops...
We report the first measurement of target single spin asymmetries in semi-inclusive $^3{He}(e,e'\pi^\pm)X$ reaction on a transversely polarized target. The experiment, conducted at Jefferson Lab using 5.9 GeV electron beam, covers range 0.14 $< x <$ 0.34 with 1.3 $<Q^2<$ 2.7 GeV$^2$. Collins and Sivers moments were extracted from azimuthal angular dependence measured asymmetries. $\pi^\pm$ for $^3$He are consistent zero, except $\pi^+$ moment $x=0.34$, which deviates zero by 2.3$\sigma$....
We report on precision measurements of the elastic cross section for electron-proton scattering performed in Hall C at Jefferson Lab. The were made 28 distinct kinematic settings covering a range momentum transfer $0.4<{Q}^{2}<5.5\phantom{\rule{0.3em}{0ex}}{(\mathrm{GeV}∕c)}^{2}$. These represent significant contribution to world's data set ${Q}^{2}$ range, where large discrepancy currently exists between ratio electric magnetic proton form factors extracted from previous and that recently...
We report the first measurement of parity-violating asymmetry in elastic electron scattering from proton. The depends on neutral weak magnetic form factor proton which contains new information contribution strange quark-antiquark pairs to moment obtain value ${G}_{M}^{Z}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.34\ifmmode\pm\else\textpm\fi{}0.09\ifmmode\pm\else\textpm\fi{}0.04\ifmmode\pm\else\textpm\fi{}0.05\mathrm{n}.\mathrm{m}.$ at...
We have measured the transverse asymmetry ${A}_{{T}^{\ensuremath{'}}}$ in ${}^{3}\stackrel{\ensuremath{\rightarrow}}{\mathrm{He}}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}})$ quasielastic scattering Hall A at Jefferson Laboratory with high precision for ${Q}^{2}$ values from 0.1 to $0.6(\mathrm{GeV}/c{)}^{2}$. The neutron magnetic form factor ${G}_{M}^{n}$ was extracted based on Faddeev calculations ${Q}^{2}\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0.1$ and...
The cross section for quasielastic $^{12}\mathrm{C}$(e,e'p) scattering has been measured at momentum transfer ${\mathit{Q}}^{2}$=1, 3, 5, and 6.8 (GeV/c${)}^{2}$. results are consistent with from a single nucleon as the dominant process. nuclear transparency is obtained compared theoretical calculations that incorporate color effects. No significant rise of ${\mathit{Q}}^{2}$ observed.
We report the first precision measurement of proton electric to magnetic form factor ratio from spin-dependent elastic scattering longitudinally polarized electrons a hydrogen internal gas target. The was performed at MIT-Bates South Hall Ring over range four-momentum transfer squared Q2 0.15 0.65 (GeV/c)(2). Significantly improved results on and factors are obtained in combination with existing cross-section data electron-proton same region.
Due to the power quality problems and use of some nonlinear loads such as soft starters, rectifiers, frequency converters, circuit current will contain complicated harmonic components, which may affect identification accuracy arc fault. Aiming at interferences supply harmonics load noise, a kind recognition method based on kernel principal component analysis (KPCA) firefly algorithm optimized support vector machine (FA-SVM) was proposed. KPCA used separate noise in voltage signals. Kurtosis...
Abstract The solenoidal large intensity device (SoLID) is a new experimental apparatus planned for Hall A at the Thomas Jefferson National Accelerator Facility (JLab). SoLID will combine angular and momentum acceptance with capability to handle very high data rates luminosity. With slate of approved high-impact physics experiments, push JLab limit QCD frontier that exploit full potential its 12 GeV electron beam. In this paper, we present an overview rich program can be realized SoLID, which...
The fast and accurate series arc fault (SAF) identification method its hardware implementation are the key to development of circuit interrupter (AFCI) or detection device (AFDD). SAF experiments under household multi-branch conditions were conducted. And a novel model based on lightweight one-dimensional (1-D) convolutional neural network was proposed. First, main-circuit current signal used as input model. 1-D layers maximum pooling extract features signal. fully connected (FCNN) identify...
A newly obtained sample of inclusive electron-nucleon scattering data has been analyzed for precision tests quark-hadron duality. The are in the nucleon resonance region, and span range 0. 3<Q2<5.0 (GeV/c)(2). Duality is observed both limited extended regions around prominent enhancements. Higher twist contributions to F2 structure function found be small on average, even low Q2 regime approximately 0.5 Using duality, an average scaling curve obtained. In all cases, duality appears a...
We report a measurement of the asymmetry in spin-dependent quasielastic scattering longitudinally polarized electrons from He3 target. The neutron magnetic form factor GMn has been extracted measured based on recent PWIA calculations using spectral functions. Our determination at Q2=0.19 (GeV/c)2 agrees with dipole parametrization. This experiment represents first electron scattering.DOI:https://doi.org/10.1103/PhysRevC.50.R546©1994 American Physical Society
A newly obtained data sample of inclusive electron-nucleon scattering from both hydrogen and deuterium targets is analyzed. These JLab span the nucleon resonance region up to four-momentum transfers 5 (GeV/c)(2). The are found follow an average scaling curve. inclusion low-momentum transfer yields a curve resembling deep inelastic neutrino-nucleus data, suggesting sensitivity valencelike structure only.
We report on a new measurement of the parity-violating asymmetry in quasielastic electron scattering from deuteron at backward angles Q2=0.038 (GeV/c)2. This quantity provides determination neutral weak axial vector form factor nucleon, which can potentially receive large electroweak corrections. The measured A=-3.51+/-0.57 (stat)+/-0.58 (syst) ppm is consistent with theoretical predictions. also updated results previous experiment Q2=0.091 (GeV/c)2, are
The 1H(e,e′π+)n cross section was measured for arange of four-momentum transfer up to Q2=3.91GeV2 at values the invariant mass W above resonance region. Q2 dependence longitudinal component found be consistent with Q2-scaling prediction hard exclusive processes. This suggests that QCD factorization theorem is applicable rather low Q2. transverse term falls off slower than naive Q−8 expectation and remains appreciable even Q2=3.91GeV2.Received 12 July...
A cryogenic apparatus is described that enables a new experiment, nEDM@SNS, with major improvement in sensitivity compared to the existing limit search for neutron Electric Dipole Moment (EDM). This uses superfluid 4He produce high density of Ultra-Cold Neutrons (UCN) which are contained suitably coated pair measurement cells. The be operated at Spallation Neutron Source Oak Ridge National Laboratory, polarized 3He from an Atomic Beam injected into and transported cells where it serves as...
Accurate prediction of methane concentration in mine roadways is crucial for ensuring miner safety and enhancing the economic benefits mining enterprises field coal safety. Taking Buertai Coal Mine as an example, this study employs laser monitoring sensors to conduct precise real-time measurements roadways. A model roadways, based on Improved Black Kite Algorithm (IBKA) coupled with Informer-BiLSTM, proposed. Initially, traditional (BKA) enhanced by introducing Tent chaotic mapping,...
We report the results from a systematic study of quasielastic $(e,{e}^{\ensuremath{'}}p)$ reaction on $^{12}\mathrm{C},\phantom{\rule{0.5em}{0ex}}^{56}\mathrm{Fe}$, and $^{197}\mathrm{Au}$ performed at Jefferson Lab. have measured nuclear transparency extracted spectral functions (corrected for radiation) over ${Q}^{2}$ range $0.64--3.25\phantom{\rule{0.5em}{0ex}}{(\text{GeV}∕c)}^{2}$ all three nuclei. In addition, we separated longitudinal transverse 0.64...
The ( ${e,e}^{\ensuremath{'}}p$) reaction was studied on targets of C, Fe, and Au at momentum transfers squared ${Q}^{2}$ 0.6, 1.3, 1.8, $3.3{\mathrm{GeV}}^{2}$ in a region kinematics dominated by quasifree electron-proton scattering. Missing energy missing distributions are reasonably well described plane wave impulse approximation calculations with $A$ dependent corrections that measure the attenuation final state protons.
The quasielastic ${(e,e}^{\ensuremath{'}}p)$ reaction was studied on targets of deuterium, carbon, and iron up to a value momentum transfer ${Q}^{2}$ $8.1(\mathrm{GeV}{/c)}^{2}.$ A nuclear transparency determined by comparing the data calculations in plane-wave impulse approximation. dependence mass number investigated search for onset color phenomenon. We find no evidence within our range ${Q}^{2}.$ fit world's reflects energy free-proton--nucleon cross section.
A high precision measurement of the transverse spin-dependent asymmetry ${A}_{{T}^{\ensuremath{'}}}$ in ${}^{3}\mathrm{He}\ensuremath{\rightarrow}(\stackrel{\ensuremath{\rightarrow}}{e}{,e}^{\ensuremath{'}})$ quasielastic scattering was performed Hall at Jefferson Lab values squared four-momentum transfer, ${Q}^{2},$ between 0.1 and 0.6 $(\mathrm{G}\mathrm{e}\mathrm{V}/{c)}^{2}.$ is sensitive to neutron magnetic form factor, ${G}_{M}^{n}.$ Values ${G}_{M}^{n}$ ${Q}^{2}=0.1$...