A5103284590- Adhesion, Friction, and Surface Interactions
- Photocathodes and Microchannel Plates
- Near-Field Optical Microscopy
- Orbital Angular Momentum in Optics
- Diamond and Carbon-based Materials Research
- Particle Accelerators and Free-Electron Lasers
- Gyrotron and Vacuum Electronics Research
- Metal and Thin Film Mechanics
- Particle physics theoretical and experimental studies
- Tribology and Lubrication Engineering
- Photonic Crystals and Applications
- Lubricants and Their Additives
- Quantum Chromodynamics and Particle Interactions
- Crystallization and Solubility Studies
- X-ray Diffraction in Crystallography
- Particle accelerators and beam dynamics
- Plasmonic and Surface Plasmon Research
- Electron and X-Ray Spectroscopy Techniques
- Metal-Organic Frameworks: Synthesis and Applications
- Fuel Cells and Related Materials
- Force Microscopy Techniques and Applications
- Advanced Chemical Physics Studies
- Dark Matter and Cosmic Phenomena
- Magnetic Properties and Synthesis of Ferrites
- Magnetic Properties and Applications
Qufu Normal University
2021-2024
Xidian University
2021-2024
Seagate (United States)
2005-2022
Beihang University
2022
Weatherford College
2020
Shihezi University
2016
Xinjiang Production and Construction Corps
2016
Stanford University
1993-2002
Stanford Synchrotron Radiation Lightsource
1995-2002
SLAC National Accelerator Laboratory
1995-2002
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...
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...
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 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 Stanford 3-km linear accelerator at SLAC has operated exclusively since early 1992 using a polarized electron beam for its high-energy physics programs. source now consists of diode-type gun with strained-lattice GaAs photocathode DC biased high voltage and excited circularly photons generated by pulsed, Ti:sapphire laser system. polarization the is > 80%. To date met all requirements SLC fixed target programs < 5% downtime.
The ratio g1F1 has been measured over the range 0.03 < x 0.6 and 0.3 Q2 10 (GeV/c)2 using deep-inelastic scattering of polarized electrons from protons deuterons. We find to be consistent with no Q2-dependence at fixed in region > 1 (GeV/c)2. A trend is observed for decrease lower Q2. Fits world data without a possible are agreement Bjorken sum rule, but Δq substantially less than quark-parton model expectation.
We have measured the proton and deuteron spin structure functions g_1^p g_1^d in region of nucleon resonances for W^2 < 5 GeV^2 $Q^2\simeq 0.5$ 1.2$ by inelastically scattering 9.7 GeV polarized electrons off $^{15}NH_3$ $^{15}ND_3$ targets. observe significant resonance region. used present results, together with deep-inelastic data at higher W^2, to extract $\Gamma(Q^2)\equiv\int_0^1 g_1(x,Q^2) dx$. This is first information on low-Q^2 evolution Gamma toward Gerasimov-Drell-Hearn limit Q^2 = 0.
Well-designed full-color emission, AIE, CIEE-active luminogens and high contrast mechanochromic behaviour.
Mössbauer spectra of Zn0.2Fe2.3O4 particles at different temperatures have been obtained. They analyzed with five components, one due to the A-site Fe3+ ions, and others B-site Fe2+ ions. Magnetic electronic properties discussed regard zinc substitution temperature dependence.
Abstract In order to ensure the space charge compensation of plume, conventional ion thrusters need an additional neutralizer release electrons. When a radio-frequency (RF) voltage is applied across grid system instead direct-current voltage, simultaneous extraction ions and electrons achieved, thereby not required. this paper, based on non-uniform distribution neutral gas density calculated using angular coefficient method, particle-in-cell Monte Carlo collision method used thoroughly...
Abstract Developing a new type of proton conductive material is key to improve the energy conversion performance exchange membrane fuel cell (PEMFC). In recent years, metal organic framework (MOF) matrix materials have become one research hotspots in field MOF. However, grain boundaries MOF particles and MOF@polymer composite films make it difficult form long‐range ordered transport channels. Reducing crystallinity changing internal structural properties may effectively its conductivity....
The red blood cells, the role of which is difficult to underestimate in life and biology, were usually chosen as a sample for observation an optical microscope. In this paper, we show that using microscopy based on high-index spherical mesoscale particles with refractive index 1.9, generating non-evanescent curved light beam subwavelength structures – so-called structure photonic hook by partial illumination conditions, it possible study transformation dynamics erythrocyte into echinocyte....
Based on the optical Magnus effect, analytical expressions of electromagnetic field that a spinning dielectric sphere illuminated by polarized plane waves are derived according to "instantaneous rest-frame" hypothesis and Minkowski’s theory. More attention is paid near field. The unusual phenomena in mesoscale spheres without material illumination wave asymmetry photonic hook (PH) whispering gallery mode (WGM)-like resonance caused rotation explored. impact scattering PHs further analyzed...
An optical pump-probe set-up that allowed short dwell time ( ~ 500 μs) heating with a high-temperature ramp rate 10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</sup> K/s) was used to detect the magnetization change in heat assisted magnetic recording (HAMR) media. The temperature of media monitored by observing Kerr signal. pump power at zero determination needed attain Curie (the determined magnetometer before experiments). HAMR then...
The de-wetting process of Zdol-type lubricants on hard disks has been studied at the molecular scale with scanning polarization force microscopy (SPFM) and ellipsometry. It was found that occurred over hours to days when initial lubricant layer thicker than one monolayer (∼20 Å thick). De-wetting take place in a layered fashion for Zdol-TX Z-Tetraol, weakly bound second layers accreting into droplets, however, no layering seen Zdol during de-wetting, only droplets. droplets eventually grew...
The effect of lubricant on flyability and read-write performance in ultra-low flying regime has been studied over the disks with one half disk surface thicker than other half. dynamics a slider was monitored using Acoustic Emission (AE) Laser Doppler Vibrometer (LDV). An instability characteristic thick region observed this intensifies as height decreases step thickness increases. After flies disks, it found that re-distribution occurs is “carried” by from deposited onto thin region....
The curved photonic nanojet (CPNJ) produced due to the interaction between a dielectric circular cylinder rotating at stable angular velocity and plane wave is investigated. Based on this model, optical Magnus effect of verified. And analytical expression both internal external electric field are given based instantaneous rest-frame theory partial-wave series expansion method in cylindrical coordinates. influence size parameter, relative refractive index, dimensionless parameter CPNJ...
Lubricant accumulation was found on the media surface instant when laser is turned OFF during heat-assisted magnetic recording write operations. By changing cycles, ON/OFF duration, media, and head temperatures, we find that this lubricant related to change in head-media temperatures. The observed deposition process restricted a short time window (1-2 μs) after OFF. An equilibrium model of thermal displacement due evaporation condensation processes presented used discuss effect temperature...
Media lubricants are critical to the reliability of hard disc drives (HDDs). Ideally, lubricant should have high thermal stability and low monolayer (ML) thickness. Unfortunately, state-of-the-art perfluoropolyether (PFPE) only has limited stability, its ML is relatively thick due polymeric chain structure. In this study, we showed that an ionic liquid (IL) with imidazolium cations fluorinated anions, [Bmim][FAP], higher than PFPE Z-tetraol based on thermogravimetric analysis (TGA)....
As a new type of proton conductor, metal–organic frameworks (MOFs) have attracted much attention because their superior properties over conventional materials, such as the modifiability framework, reversibility coordination bond, high specific surface area, and porosity. It is predicted that conductivities MOFs can be improved by hole expansion ionic liquid introduction. In this work, HKUST‐1 LP‐HKUST‐1 were prepared, which filled with different proportions N‐methylimidazole triflate (MIM‐CF...