A5048041363- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- High-pressure geophysics and materials
- Laser-Matter Interactions and Applications
- Microwave Engineering and Waveguides
- Laser Design and Applications
- Radio Frequency Integrated Circuit Design
- Advanced Power Amplifier Design
- Atomic and Molecular Physics
- Diamond and Carbon-based Materials Research
- Advanced X-ray Imaging Techniques
- Plasma Diagnostics and Applications
- Electromagnetic Compatibility and Noise Suppression
- Healthcare Systems and Reforms
- Advanced Antenna and Metasurface Technologies
- Optical Systems and Laser Technology
- Global Public Health Policies and Epidemiology
- Antenna Design and Analysis
- Nuclear Physics and Applications
- Optical Coatings and Gratings
- Geological and Geochemical Analysis
- Near-Field Optical Microscopy
- X-ray Spectroscopy and Fluorescence Analysis
- Advanced Chemical Physics Studies
- Gold and Silver Nanoparticles Synthesis and Applications
Peking University
2020-2025
China Academy of Engineering Physics
2015-2024
Chinese Academy of Engineering
2018-2024
University of Science and Technology of China
2003-2021
Northwest Institute of Nuclear Technology
2017-2020
Shanghai Jiao Tong University
2018-2019
Laser Research Institute
2016-2019
Institute of Applied Physics and Computational Mathematics
2019
Huazhong University of Science and Technology
2018
Laser Fusion Research Center
2016-2018
A resilient health system plays a crucial role in pandemic preparedness and response. Although the World Health Organization (WHO) has required all states parties to strengthen core capacities respond public emergencies under International Regulations (2005), actions of most countries combating coronavirus disease 2019 (COVID-19) showed that they are not well-prepared. This cross-sectional study aimed examine resilience selected analyze their strategies measures response COVID-19...
The ShenGuang-III (SG-III) laser facility was developed by the fusion research center (LFRC) for inertial confinement (ICF) studies in China. Over 80 diagnostics have been installed at SG-III facility, including optical diagnostics, x-ray imaging spectrum product and general assistant systems, as well central control data acquisition systems. Various ICF experiments also performed facility. first experiment explored laser-target coupling process, investigations of hohlraum radiation flux...
We report experimental research on laser plasma interaction (LPI) conducted in Shenguang facilities during the past ten years. The generally consists of three phases: (1) developing platforms for LPI mm-scale with limited drive energy, where both gasbag and gas-filled hohlraum targets are tested; (2) studying effects beam-smoothing techniques, such as continuous phase plate polarization smoothing, suppression LPI; (3) exploring factors affecting integrated implosion experiments, which...
Abstract Background The COVID-19 pandemic exposed significant limitations in health systems worldwide and emphasized the need for updated National Health Policies, Strategies, Plans (NHPSPs). This study aimed to evaluate NHPSPs of Organization Economic Cooperation Development (OECD) BRICS (Brazil, Russia, India, China, South Africa) countries before after pandemic. Specifically, it explored each country’s commitment strengthening address threats analyzed specific changes made. Methods NHPSP...
A 100 kJ-level laser facility has been designed to study inertial confinement fusion physics in China. This incorporates various diagnostic techniques, including optical, x-ray imaging, spectrum, and product diagnostics, as well general diagnostics assistance systems central control data acquisition systems. paper describes recent developments at the facility.
A novel design of quasi-sinusoidal single-order diffraction transmission grating (QSTG) is proposed, which can achieve a line density up to thousands line/millimeter as that traditional gratings with the current level nanofabrication technique. We fabricate 1000 line/mm QSTG using new approach, and display calibration results such on soft x-ray beam synchrotron radiation.
This note describes multi-updates of the novel flat-response x-ray detector in fabrication technology, experimental application, and data uncertainty evaluation. Unlike previous design, compound filter is combined into one piece through an improved process that greatly enhanced its self-supporting capability. A method pinhole-array imaging introduced application to stop any debris from hohlraum uniformly reduce radiation flux. The results show this works well. Furthermore, a evaluation flux...
Measuring the x-ray flux exiting target's laser entrance hole (LEH) is most common diagnostic that quantifies intensity inside laser-driven hohlraum. However, this signal accounts for only a small portion of incident power and thus likely to be affected by unwanted background from non-target area, leading an overestimation hohlraum drive. Unwanted emission might produced when light clipped LEH (LEH clipping) because lack clearance spot, or with spot comprising discrete structure, even poor...
In inertial confinement fusion (ICF), polycrystalline diamond—referred to as high density carbon (HDC)—has become a promising ablator candidate. However, with smaller grain size and lower initial density, the equation of state (EOS) for HDC can deviate from that single-crystal diamond, which could be concern ICF designs, but current experimental EOS studies are far sufficient clarify how affects target compressibility. Presented here measurements Hugoniot an 3.23 g/cm3 at pressures 17–26...
A Z-pinch dynamic hohlraum can create the high-temperature radiation field required by indirect-drive inertial confinement fusion. with peak temperature over 300 eV be obtained a >50 MA driver according to scaling law of vs drive current. Based on uniform profile width 10 ns, three double-shell capsules radii 2, 2.5, and 3 mm are proposed, corresponding fusion yields from one-dimensional calculation 28.8, 56.1, 101.6 MJ. The implosion dynamics 2.5 mm-radius capsule is investigated in...
The first octahedral spherical hohlraum energetics experiment is accomplished at the SGIII laser facility. For time, 32 beams are injected into through six entrance holes. Two techniques used to diagnose radiation field of in order obtain comprehensive experimental data. flux streaming out holes measured by flat-response x-ray detectors (FXRDs) and four M-band detectors, which placed different locations target chamber. temperature derived from FXRD using blackbody assumption. peak inside...
The equation of state, the self-diffusion coefficient and viscosity fluid iron in warm dense regime at densities from 12.5 to $25.0\phantom{\rule{0.28em}{0ex}}{\mathrm{g}/\mathrm{cm}}^{3}$, temperatures 0.5 15.0 eV have been calculated via quantum molecular dynamics simulations. principal Hugoniot is good agreement with nuclear explosive experiments up $\ensuremath{\sim}50\phantom{\rule{0.28em}{0ex}}\mathrm{Mbar}$ but predicts lower pressures compared high intensity laser results. simulated...
A new dispersive element named as quantum-dot-array diffraction grating [L. F. Cao, China patent No. 200410081499 (August 10, 2004)] for visible light has been developed and characterized experimentally. large number of quantum dots distributed on a substrate sinusoidal function can be used to diffract x rays without higher-order diffraction. The experimental patterns show that the diffractions which inevitably exist in spectrum recorded using traditional gratings eliminated effectively by...
A gold transmission grating is used routinely to disperse the x-ray spectrum at Z soft facility measure and temporal history of absolute power emitted from z-pinch hohlraum radiation sources. quantum-dot-array diffraction (QDADG) 250 lines/mm for designed fabricated first time according principle binary sinusoidal grating. The efficiencies are measured in 150-300 eV photon energy range on Beamline 3W1B Beijing Synchrotron Radiation Facility. This article describes basic concept calibration...
In this paper, a novel wideband GaN HEMT power amplifier (PA) using microstrip radial stub (MRS) in both input and output matching networks to suppress harmonic components of 2.14 GHz is analyzed, fabricated, tested. The angle subtended by MRS the bottom length are analyzed for suppressing purpose. characteristic compared with normal 50 Ohm quarter-wave rectangular stub. second third harmonics suppressed −38.37 dB −29.53 dB, respectively. −15 dBc bandwidth over 1.32 at bands obtained. By...
A Thomson scattering diagnostic system, using a 263 nm laser as the probe beam, is designed and implemented on Shenguang-III prototype facility. The beam provided by an additional line completed recently. system allows simultaneous measurements of both ion feature red-shifted electron from plasmas in high-temperature (≥2 keV) high-density (≥10(21) cm(-3)) regime. Delicate design made to satisfy requirements for successful detection feature. High-quality spectra have already been diagnosed...
Laser-direct-driven ramp compression experiments were performed on long temporally shaped laser pulses based an analytical isentropic model. Upper pressure limits, the ablation scaling law, and stress-density curves studied. The validity of model used, phenomena missing line-imaging velocity interferometer (VISAR) fringes in experimental results are discussed.
<title>Abstract</title> Background We aimed to evaluate the National Health Policies, Strategies and Plans (NHPSPs) of Organization for Economic Cooperation Development (OECD) BRICS before after COVID-19 pandemic explore nations' commitment strengthen their health systems in defense threats analyze specific changes. Methods systematically searched NHPSP documents from WHO document repository official governmental websites. Data was then extracted using a standardized extraction template. A...
Abstract Background As a recognized win–win-win approach to international debt relief, Debt-to-Health(D2H)has successfully translated repayments into investments in health-related projects. Although D2H has experienced modifications and periodic suspension, it been playing an increasingly important role resource mobilization public health, particularly for low-and middle-income countries deep debt. Main text D2H, as practical health financing instrument, is not fully evidenced gauged by...
A novel phase-type quantum-dot-array diffraction grating (QDADG) is reported. In contrast to an earlier amplitude-type QDADG [C. Wang et al., Rev. Sci. Instrum. 78, 053503 (2007)], the new would remove zeroth order at some certain wavelength, as well suppressing higher-order diffractions. this paper, basic concept, fabrication, calibration techniques, and results are presented. Such a can be applied in research fields of beam splitting, laser probe diagnostics, so on.
In order to produce millimeter-scale plasmas for the research of laser-plasma interactions (LPIs), gasbag target is designed and tested on Shenguang-III prototype laser facility. The x-ray pinhole images show that are produced with gasbag. electron temperature inferred from stimulated Raman scattering (SRS) spectrum about 1.6 keV. SRS also indicates density has a flat region within duration 200 ps. obvious differences between results void half hohlraum feasibility in creating plasmas. LPIs...
With a 263.3 nm probe laser beam, the Thomson scattering (TS) spectra are measured at distance from surface of gold disc targets as close 50μm. All TS become narrower with time, which indicates overall drop plasma temperature high-Z plasmas blow off. The experimental data show that there distinct characteristics between inner region (i.e., 50 and 100μm away target surface) outer region. gradient electron in is toward becomes opposite to asymmetries good agreement calculation based on...