A5043449294- Particle Accelerators and Free-Electron Lasers
- Antenna Design and Analysis
- Particle accelerators and beam dynamics
- Advanced Antenna and Metasurface Technologies
- Superconducting Materials and Applications
- Metamaterials and Metasurfaces Applications
- Particle physics theoretical and experimental studies
- Magnetic confinement fusion research
- Microwave Imaging and Scattering Analysis
- Antenna Design and Optimization
- Quantum Chromodynamics and Particle Interactions
- Advanced oxidation water treatment
- Particle Detector Development and Performance
- Atomic and Subatomic Physics Research
- Environmental remediation with nanomaterials
- Advanced MIMO Systems Optimization
- High-Energy Particle Collisions Research
- Silicon Carbide Semiconductor Technologies
- Catalytic Processes in Materials Science
- Photonic and Optical Devices
- Dark Matter and Cosmic Phenomena
- Experimental and Theoretical Physics Studies
- Orbital Angular Momentum in Optics
- Microwave Engineering and Waveguides
- Electromagnetic Compatibility and Measurements
Sichuan Normal University
2024
Tongji University
2023
Xi'an Jiaotong University
2019-2021
Brookhaven National Laboratory
2002-2016
University of Wisconsin–Madison
2007
University of Geneva
2007
High Energy Accelerator Research Organization
2007
RIKEN BNL Research Center
2006
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.
Correlations and mutual couplings in antenna arrays lead to performance deterioration of multiple-input-multiple-output (MIMO) systems. The relation between coupling correlation is complex, especially non-isotropic multipath environments. Reducing does not guarantee an eventual reduction the overall vice versa. In general, it a trivial task reduce simultaneously arbitrary this correspondence, planar metamaterial structure (PMS) array-antenna decoupling surface (ADS) are applied array for...
A frequency-diverse metasurface antenna with hybrid bunching methods for coincidence imaging is proposed in this paper. The contains an excitation system, a and double-layer-metal-plate system. Firstly, the system of divided into two parts, bunching-excitation module random-excitation module. includes seven-element coherent array that can generate beams 80 degree beamwidth from 32GHz to 36GHz; eight elements distributed evenly excite same working bandwidth. multilayer feed also designed...
A frequency-diverse metamaterial cavity antenna (FDMCA) that can be used for the microwave coincidence imaging is proposed in this letter. The FDMCA a slot array excited by metamaterial-based cavity, which generate diverse radiation patterns at different frequencies. average electric-field variation (AEV) introduced to forecast correlation coefficients of generated antenna. lower are, better quality reconstructed image is. To verify validity AEV and superiority FDMCA,...
A frequency-polarization sensitive metasurface antenna (FPSMA) that can generate low-correlated measurement modes both at different working frequencies and under polarization statuses is proposed in this letter. The FPSMA composed of a linearly polarized patch as the excitation module modulation module. capacity enlarged significantly due to introducing domain. domain refers angle between direction metasurface. Performances FPSMA, including reflection coefficient, radiation efficiency,...
A frequency-polarization-port-diverse (FPPD) cavity imager with bunching random beams working in the W-band (from 76 GHz to 81 GHz) is proposed this paper. random-coherent-superposition design method utilized beam. Low-correlated radiation patterns can be generated when excited either at different frequencies or by ports. Orthogonal polarized also vary from each other, which enlarge measurement modes polarization dimension. The FPPD composed of a disordered cavity, lid etched elliptical...
The single transverse spin asymmetry, A_N, of the p-carbon elastic scattering process in Coulomb Nuclear Interference (CNI) region was measured using an ultra thin carbon target and polarized proton beam Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory (BNL). In 2004, data were collected to calibrate two RHIC energies (24 GeV, 100 GeV). A_N obtained as a function momentum transfer -t. results fit with theoretical models which allow us assess contribution from hadronic...
A disordered-cavity-based metaimager (DCM) that can be used for coincidence imaging is proposed in this letter. The DCM possesses narrow frequency gap, low correlation coefficients, and high efficiency. Due to the all-in-one design, has good robustness insensitive fabrication errors, which suitable fabricated using 3-D printing technique. working from 32 36 GHz contains a disordered cavity, sets of high-efficiency coupling slots frequency-diverse metasurface. Measurement modes generated by...
Beam induced pressure rise in RHIC warm sections is one of the machine luminosity limits. The electron cloud and beam transition are discussed. Countermeasures studies for upgrade reported.
Acceleration of polarized protons in the energy range 5 to 25 GeV is particularly difficult: depolarizing resonances are strong enough cause significant depolarization but full Siberian snakes intolerably large orbit excursions and not feasible AGS since straight sections too short. Recently, two helical partial have been built installed AGS. With careful setup optics at injection along ramp, this combination can eliminate intrinsic imperfection encountered during acceleration. This paper...
The AGS accelerator complex is into its third year of 60+/spl times/10/sup 12/ (teraproton=Tp) per cycle operation. hardware making up the as configured in 1997 briefly mentioned. present level performance discussed. This includes beam transfer efficiencies at each step acceleration process, i.e. losses; which are a serious issue this intensity level. Progress made understanding behavior Linac-to-Booster (LtB) injection, Booster-to-AGS (BtA) well across 450 ms accumulation porch presented....
In this paper, a new method to compare the effectiveness of stirrer by calculating number characteristic modes is proposed. We find that, for Z-shaped stirrers, more has, better it works in reverberation chamber. The refer whose angels fall between 135 and 225 degree. measured terms field uniformity defined as standard deviation (STD)of average power total electric fields at eight vertices working volume. Three types stirrers with same rotational volume are used verifications.
In this article, a wideband spherical-plane wave conversion metalens (WSPCM) working in the K-band is designed. The WSPCM consists of metamaterial elements with gradient transmission phases, which can transform oblique-incident spherical to plane propagating along direction from source center metalens. First, five-layer element phase designed using Computer Simulation Technology software. Then, wedge eight 30° (that deflect incident by 30°) verify modulation characteristic element....
Orbital angular momentum (OAM) waves have been applied to various applications thanks the orthogonality between different OAM modes. can be generated using techniques. However, in practice are not pure, which influences orthogonality. Thus it is important evaluate purity of The common method for assessment less convenient practical measurements. In this paper, a novel based on reverberation chamber (RC) proposed mode. Extensive RC measurements show that correlation coefficient modes used...