A5101943198- Radiation Detection and Scintillator Technologies
- Advanced X-ray Imaging Techniques
- Advanced X-ray and CT Imaging
- Neutrino Physics Research
- Nuclear Physics and Applications
- GaN-based semiconductor devices and materials
- Medical Imaging Techniques and Applications
- Ga2O3 and related materials
- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- ZnO doping and properties
- Particle accelerators and beam dynamics
Institute of High Energy Physics
2016-2020
Chinese Academy of Sciences
2016-2020
University of Chinese Academy of Sciences
2018-2020
A high performance multichannel analyzer (MCA) based on traditional used pulse forming method and high-speed waveform sampling technology was developed in this paper for spectra analysis radioactive measurement. The self-developed MCA is composed of conditioning part processing part. including pole-zero cancellation, polarity conversion, programmable amplification, active integral filter, baseline recovery peak holding adopted to realize Gauss shaping functions, while the mainly dither...
Researchers at IHEP have conceived a new concept of MCP-PMT several years ago. The small MCP units replace the bulky Dynode chain in large PMTs. In addition transmission and reflection photocathode are applied same glass bulb to enhance efficiency photoelectron conversion. After R&D, 20 inch was successfully produced for JUNO. From 2017 2020, all 20-inch PMTs JUNO been under production testing NNVT. Furthermore, QE this type is improved from 28% 34%@400nm 2018, technology has already used on...
Role of vacancy-type (N vacancy (VN) and Ga (VGa)) defects in magnetism GaMnN is investigated by first-principle calculation. Theoretical results show that both the VN VGa influence ferromagnetic state a system. The can induce antiferromagnetic indirectly modify stability depopulating Mn levels GaMnN. transfer electrons between ions converting Mn3+ (d4) into Mn2+ (d5). introduced ferromagnetism become stronger then gradually weaker with concentration increasing, as well coexistence (d5) are...
Lens-coupled indirect X-ray imaging detectors have the advantage of high resolution and disadvantage low detection efficiency. Using thicker single-crystalline films (SCFs) can improve However, image quality will become worse due to degradation point spread function (PSF) modulation transfer (MTF). This be improved by deconvolution with PSF, which is unknown. In this article, a method was established acquire PSF based on simulation process for lens-coupled detector. Because structural...
Large area PMTs (LPMT) are widely used in neutrino experiments and cosmic ray detection. To meet the performance requirements for Jiangmen Underground Neutrino Observatory (JUNO), researchers at IHEP developed 20-inch MCP-PMTs which provide higher collection efficiency a lower cost. 15k produced by North Night Vision Technology Co., Ltd. (NNVT) has been delivered to be installed as central liquid scintillator detector of JUNO. Compared with prototype, though (CE) quantum (QE) get improved,...