A5111187959- Nuclear reactor physics and engineering
- Nuclear physics research studies
- Nuclear Physics and Applications
- Laser-Plasma Interactions and Diagnostics
- High-pressure geophysics and materials
- Diamond and Carbon-based Materials Research
- Laser-induced spectroscopy and plasma
- Astronomical and nuclear sciences
- Metal and Thin Film Mechanics
- Laser-Matter Interactions and Applications
- High-Velocity Impact and Material Behavior
- Graphene research and applications
- Energetic Materials and Combustion
- Advanced ceramic materials synthesis
- Thermal Radiation and Cooling Technologies
- Thermal properties of materials
- Lightning and Electromagnetic Phenomena
- Advanced Surface Polishing Techniques
- Laser Material Processing Techniques
- High voltage insulation and dielectric phenomena
- Chemical Reactions and Mechanisms
- Advanced MEMS and NEMS Technologies
- X-ray Spectroscopy and Fluorescence Analysis
- Gas Sensing Nanomaterials and Sensors
- Atomic and Molecular Physics
China Academy of Engineering Physics
2016-2024
China Institute of Atomic Energy
2010-2024
Laser Fusion Research Center
2017-2024
Shanghai Jiao Tong University
2018
State Key Laboratory of Electrical Insulation and Power Equipment
2015
Xi'an Jiaotong University
2014
Jiangsu University
2011-2012
The dynamic fragmentation of shock-loaded high-Z metal is considerable importance for both basic and applied science. areal density mass-velocity distribution are crucial factors in understanding this issue. Experimental methods, such as pulsed X-ray radiography proton radiography, have been utilized to obtain information on factors; however, they restricted a complex device, the spatial resolution order 100 μm. In work, we present high-quality laser tin, with good two-dimensional (2D)...
Abstract When a triangular shock wave reflects from the free surface of solid sample, microjetting may emit grooved surface, leading to high velocity approximately micrometer-size fragments. Microjetting is an important issue for material dynamic response under loading in both fundamental science and practical applications. In this paper, process investigated laser-driven conditions, experiments were performed at ShenguangII-U (SGII-U) laser facility. grooves tin sample diagnosed with x-ray...
Understanding the lattice evolution of hexanitrostilbene (HNS) is crucial for ensuring its safety and reliability under shock loading. However, lack in situ, real-time diagnostics has limited availability parameters shock-loaded explosives. In this study, we utilized dynamic X-ray diffraction technology to obtain spectrum laser HNS determine temporal evolution. Additionally, by improving energy, initiated obtained detonation products during process. The experimental results showed presence a...
In this paper, the transient impulse performances of a 330-kV composite transmission line tower under direct lightning strokes are comprehensively presented. An equivalent distributed parameter model combined with lumped capacitance elements for is established. The wave impedances hybrid determined by using analytic equations. capacitances calculated 3-D finite element method (FEM). accurate extended grounding structure (EGS) base considering soil ionization used to simulate its...
Experiments of laser-driven hypervelocity flyers have been conducted at the SG-III prototype laser facility. Using continuum phase plate technique, four beams each with a 3-ns quadratic profile are configured to produce relatively uniform irradiated spots diameter size either 500 μm or 2000 μm. With former, specifically designed multi-layered (polyimide/copper) were accelerated by shock impedance and reverberation techniques via direct ablation super-high averaged velocity 55 km/s, much...
The thermal resistance of the graphene-Si interface is systematically investigated based on micro-canonical ensemble (NVE) by using three kinds interaction potentials. When system reaches steady state, heat flux applied to model. results show that weakened because defect in graphene. Defect graphene leads a sharp decline interfacial resistance. However, declines gradually with area increase. increased 19.7% total area, tends be stable.
Laser-driven flier impact experiments have been designed and performed at the SG-III prototype laser facility. The continuum phase plate (CPP) technique is used for 3 ns quadrate pulse to produce a relatively uniform irradiated spot of 2 mm. peak intensity 2.7×1013 W/cm2 it accelerates aluminum with density gradient configuration high average speed 21.3 km/s, as determined by flight-of-time method line VISAR. decelerates on transparent silica window, providing measure flatness after one...
To accurately predict the detonation and safety performances of high-energy explosives, it is necessary to investigate their reaction mechanisms on different scales, which, however, presents a challenge due complex kinetics explosives lack experimental methods presently. This work introduces time-resolved pump-probe experiments capabilities aiming at based large-scale laser facilities recent progress in research dynamic process obtaining following understandings: (1) First, micron-sized...
The electronic structure and optical properties of pure ZnO 12.5% In-doped Zn 0.875 In 0.125 O are calculated by first-principle method based on density functional theory (DFT). results reveal that the lattice constants cell become larger but band gap narrows. Moreover, absorption ultraviolet-visible light is enhanced an peak appears in near infrared region. show imaginary part dielectric function has increasing trend compared with ZnO. It builds theoretical basis for design practical...
This work investigates the geometric statistics method to characterize size distribution of tin fragments produced in laser shock-loaded dynamic fragmentation process. In shock experiments, ejection sample with etched V-shape groove free surface are collected by soft recovery technique. Subsequently, automatically detected fine post-shot analysis techniques including X-ray micro-tomography and improved watershed method. To distributions fragments, a theoretical random model based on Poisson...
New evaluations for several actinide nuclei of the third version Chinese Evaluated Nuclear Data Library Neutron Reaction (CENDL-3.1) have been completed and released. The evaluation is all neutron induced reactions with uranium, neptunium, plutonium americium in mass range A = 232–241, 236–239, 236–246 240–244, respectively, cover incident energy up to 20 MeV. In present evaluation, much more effort was devoted improving reliability evaluated nuclear data available new measured data,...
The physics of shock-induced ejection is a crucial phenomenon in the field shock compression science and technology. Limited by loading methods, previous research primarily focused on ejecta induced single shockwave, with few data available multiple shockwave conditions. To solve this problem, we proposed double production method based high-intensity laser facility, which allows interval time between waves to be adjusted nanosecond microsecond timescale. Meanwhile, applied techniques study...
The prompt fission neutron spectra for the neutron-induced of 235U at En < 5 MeV are calculated using nuclear evaporation theory with a semi-empirical model, in which nonconstant and constant temperatures related to Fermi gas model taken into account. reproduce experimental data well. For n(thermal)+ reaction, average temperature fragment, probability distribution temperature, discussed compared Los Alamos model. energy carried away by γ rays emitted from each fragment is also obtained...
In this paper, the surge voltages of grounding system for a 330 kV high voltage (HV) composite transmission tower under lightning strokes are comprehensively presented. An equivalent distributed parameter model is established to investigate overvoltage by using EMTP program. The capacitances among adjacent two layers cross arms, between lines and ladders calculated three dimensional (3D) Finite Element Method (FEM). wave impedances ground wire arm, ladder, metallic body determined analytic...
Laser-driven flyer has been studied for decades as it promises to possess many applications such in measuring the equation of state (EOS) under ultrahigh pressure, investigating material dynamic properties high strain rate, simulating high-speed impact aircraft protection, and igniting explosives. However, planarity integrity flyers are determined by indirect velocity lnterferometer system any reflector (VISAR) or witness slab results due its speed small dimension. For further wide...
Abstract In this study, we systematically analyzed the ground state of uranium isotopes from 225 to 240. our calculations, used covariant energy density functional density-dependent meson exchange interaction (DD-ME2) with separable pairing (TMR). Using multiple deformation constraint, calculated potential surface (PES) for both even-even and even-odd nuclei quadrupole octupole deformation. Based on calculation upon comparing experimental data Hartree-Fock-Bogoliubov calculations Gogny D1S...
Due to the complex structures associated with neutron resonance cross sections, their accurate evaluation has received considerable attention in field of nuclear data research. The traditional R-matrix method still faces some difficulties evaluating data, especially briefly reproducing high-frequency oscillating sections. Recently, applications machine learning methods physics have been expanding. In this paper, a novel Phase Shift Deep Neural Network (PSDNN) method, which not only overcomes...
The phenomenon of mass ejection from shocked surface is a crucial issue in high-energy density physics and shock compression science. Ejecta double-shock loaded metallic targets important some practical applications, but there are only few research types on this aspect due to experimental difficulty. We proposed new method loading based intense laser, that is, the laser injected into vacuum hohlraum generate strong radiation plasma jet simultaneously, target respectively subjected two shocks...