A5014734895- Neutrino Physics Research
- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Photocathodes and Microchannel Plates
- Electron and X-Ray Spectroscopy Techniques
- Dark Matter and Cosmic Phenomena
- Silicon and Solar Cell Technologies
- Thin-Film Transistor Technologies
- Semiconductor materials and devices
- Radiation Detection and Scintillator Technologies
- Particle Detector Development and Performance
- Silicon Nanostructures and Photoluminescence
- Ga2O3 and related materials
- ZnO doping and properties
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Plasma Diagnostics and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Sensorless Control of Electric Motors
- Ion-surface interactions and analysis
- Nanowire Synthesis and Applications
- Electronic and Structural Properties of Oxides
- Superconducting and THz Device Technology
- Pulsed Power Technology Applications
- Radiation Effects in Electronics
Institute of High Energy Physics
2016-2025
Chinese Academy of Sciences
2015-2024
Université Libre de Bruxelles
2022
Pontifical Catholic University of Rio de Janeiro
2022
Federico Santa María Technical University
2022
Universidade Estadual de Londrina
2022
A. Alikhanyan National Laboratory
2022
Beijing Normal University
2022
Wuhan Institute of Technology
2021
University of Chinese Academy of Sciences
2019
Microchannel plate (MCP) as a key part is kind of electron multiplied device applied in many scientific fields. Oxide thin films such zinc oxide doped with aluminum (ZnO:Al2O3) conductive layer and pure (Al2O3) secondary emission (SEE) were prepared the pores MCP via atomic deposition (ALD) which method that can precisely control film thickness on substrate high aspect ratio structure. In this paper, nano-oxide ZnO:Al2O3 Al2O3 onto varied kinds substrates by ALD technique, morphology,...
The neutrino detector of the Jiangmen Underground Neutrino Observatory (JUNO) is designed to use 20 kilotons liquid scintillator and approximately 16 000 inch photomultipliers (PMTs). One options R12860 PMT with high quantum efficiency which has recently been developed by Hamamatsu Photonics. performance newly preproduction samples evaluated. results show that its 30% at 400 nm. Its Peak/Valley (P/V) ratio for single photoelectron 4.75 dark count rate 27 kHz threshold 3 mV while gain 1 ×...
Abstract Energy resolved neutron imaging has developed rapidly due to its advantage on testing the inner structure of crystal samples. Neutron detector is one key components determine results quality. The sensitive microchannel plate (nMCP) been widely used in energy experiments because high spatial and timing resolution. However, ability adjust field-of-view (FOV) resolution not realized nMCP detector, which an attractive capability experiments. In this paper, was by coupling with a time...
The application of Czochralski (Cz) monocrystalline silicon material in solar cells is limited by its high cost and serious light-induced degradation. use cast multicrystalline also hindered dislocation densities surface reflectance after texturing. Mono-like crystalline a promising because it has the advantages both mono- silicon. However, when mono-like wafers are made into cells, efficiencies batch often fluctuate within wide range >1% (absolute). In this work, classified simple...
Pure aluminum oxide (Al2O3) and zinc (Zn x Al1-x O) thin films were deposited by atomic layer deposition (ALD). The microstructure optical band gaps (E g ) of the Zn O (0.2 ≤ 1) studied X-ray diffractometer Tauc method. offsets alignment atomic-layer-deposited Al2O3/Zn0.8Al0.2O heterojunction investigated in detail using charge-corrected photoelectron spectroscopy. In this work, different methodologies adopted to recover actual position core levels insulator materials which easily affected...
A silicon (Si) surface with a nanosized porous structure was formed via simple wet chemical etching catalyzed by gold (Au) nanoparticles on p-type Cz-Si (100). The average reflectivity from 300 to 1200 nm less than 1.5%. Black Si solar cells were then fabricated using conventional production process. results reflected the output characteristics of different depths and emitter dopant profiles. Heavier dopants shallower should be adopted optimize black cell characteristics. efficiency at...
Abstract The electron multipliers gain is closely related to the secondary emission coefficient (SEE) of layer materials. SEE thickness layer. If thin, low causes multipliers. thick, conductive can't timely supplement charge layer, electronic amplifier too. usually choose Al 2 O 3 and MgO film as because high level. easy deliquescence into Mg(OH) Mg (OH) CO MgCO resulting in lower level than MgO, but stable. We designed a spherical system for testing materials, proposed use low-energy...
To adapt the specific demands of photomultiplier tubes (PMTs) in Jiangmen Underground Neutrino Observatory, we design and manufacture a new type micro-channel plate PMT (MCP-PMT) with following performance indicators: PMTs' glass shell adopts formula GG-17 which have no K<sub>2</sub>O, very low background (the contents <sup>232</sup>Th, <sup>238</sup>U <sup>40</sup>K raw materials are less than 40 ppb, 20 ppb and10 respectively). Its main body is sphere 500 mm external diameter, 4 wall...
Abstract The main objective of this study is to research the secondary electron emission characteristic different thickness alumina coatings which are prepared by atomic layer deposition (ALD) technique on several metallic secondary-emitting materials. experimental results reveal that yield (SEY) property concerned with metal work function and surface topography when coating in nanometer level. In addition, after utilizing SEY measurement setup pulsed gun, curves substrates primary energy...
The simulation of the instruments based on cascade multiplication electrons has always been an important and challenging subject in no matter high energy physics, astrophysics, radiography other fields. In this work, a generic toolkit is developed Geant4, ROOT CADMesh toolkits for electron multipliers emission process secondary electrons, especially Microchannel Plate (MCP). Geometry can be directly imported by standard CAD files multiple kinds electromagnetic fields are supported. MCPSim...
Hydrogenated amorphous silicon germanium (a-SiGe:H) thin films were prepared by a 13.56-MHz plasma-enhanced chemical vapor deposition (PECVD) method. The optical, optoelectronic, and microstructure properties of the a-SiGe:H with different plasma powers investigated systematically transmission, photo/dark conductivity, Raman, Fourier transform infrared (FTIR) spectroscopy measurements. It was found that when pressure high hydrogen (H2) dilution ratio ([H2]/([SiH4] + [GeH4])) low, an...