Zhongtao Shen
A5085376225- Particle Detector Development and Performance
- Dark Matter and Cosmic Phenomena
- Radiation Detection and Scintillator Technologies
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Atomic and Subatomic Physics Research
- Nuclear Physics and Applications
- Neutrino Physics Research
- CCD and CMOS Imaging Sensors
- Analog and Mixed-Signal Circuit Design
- Advancements in PLL and VCO Technologies
- Quantum Computing Algorithms and Architecture
- Superconducting and THz Device Technology
- Quantum and electron transport phenomena
- Quantum Information and Cryptography
- Radiation Effects in Electronics
- Synthesis and properties of polymers
- Semiconductor Lasers and Optical Devices
- Underwater Acoustics Research
- Advanced Photonic Communication Systems
- Photocathodes and Microchannel Plates
- High-Energy Particle Collisions Research
- Advanced Battery Materials and Technologies
- Radiation Therapy and Dosimetry
- Power Line Inspection Robots
University of Science and Technology of China
2016-2025
Purple Mountain Observatory
2021
Chinese Academy of Sciences
2021
Wuhan University of Technology
2019
Beijing Health Vocational College
2018
The precise measurement of the spectrum protons, most abundant component cosmic radiation, is necessary to understand source and acceleration rays in Milky Way. This work reports ray proton fluxes with kinetic energies from 40 GeV 100 TeV, two a half years data recorded by DArk Matter Particle Explorer (DAMPE). first time an experiment directly measures protons up ~100 TeV high statistics. measured confirms spectral hardening found previous experiments reveals softening at ~13.6 index...
Electronic systems for qubit control and measurement serve as a bridge between quantum programming language information processors. With the rapid development of superconducting circuit technology, synchronization in large-scale system, low-latency execution, low noise are required electronic systems. Here, we present field-programmable gate array (FPGA)-based system with distributed synchronous clock trigger architecture. The supports qubits jitters ∼5 ps. We implement real-time digital...
Precise direct cosmic-ray (CR) measurements provide an important probe to study the energetic particle sources in our Galaxy, and interstellar environment through which these particles propagate. Uncertainties on hadronic models, ion-nucleon cross sections particular, are currently limiting factor toward obtaining more accurate CR ion flux with calorimetric space-based experiments. We present energy-dependent measurement of inelastic section protons helium-4 nuclei (alpha particles) a...
Long-Time Coherent Integration (LTCI) utilizes digital integration to combine multiple coherent cycles, thereby improving the signal-to-noise ratio (SNR). Our previous work introduced single-bit LTCI, an approach optimized for FPGA implementation, but faced challenges of output saturation at high SNR levels and inherent limitations in gain (SNRG), which are insufficient certain applications. This paper presents a threshold tracking method that improves performance LTCI high-SNR scenarios. In...
Abstract The Forbush decrease (FD) represents the rapid of intensities charged particles accompanied with coronal mass ejections or high-speed streams from holes. It has been mainly explored ground-based neutron monitor network, which indirectly measures integrated all species cosmic rays by counting secondary neutrons produced interaction between atmospheric atoms and rays. space-based experiments can resolve but energy ranges are limited relatively small acceptances except for most...
Cosmic ray muon has strong penetrating power and no ionizing radiation hazards, which makes it an ideal probe for detecting special nuclear materials (SNMs). In this article, a high spatial resolution tomography system based on Micromegas detectors is proposed to optimize the imaging time quality. The includes eight thermal bonding technique scalable readout system. addition, multiplexing method position encoding developed reduce number of electronics channels by order magnitude. with can...
The BGO calorimeter, which provides a wide measurement range of the primary cosmic ray spectrum, is key sub-detector Dark Matter Particle Explorer (DAMPE). readout electronics calorimeter consists 16 pieces Actel ProASIC Plus FLASH-based field-programmable gate array (FPGA), design-level flip-flops and embedded block random access memories (RAM) are single event upset (SEU) sensitive in harsh space environment. To comply with radiation hardness assurance (RHA), SEU mitigation methods,...
A real-time n/y discrimination prototype system based on high-speed waveform sampling and high-performance field-programmable gate array (FPGA) is presented in this paper. In order to accurately record detector signals, a board with 14-bit analog-to-digital converter (AD9680) designed. The BC501A liquid scintillator employed as the neutron detector, algorithm implemented FPGA of board. calibrated by <sup xmlns:mml="http://www.w3.org/1998/Math/MathML"...
The Circular Electron Positron Collider (CEPC) is a proposing electron-positron collider in China, which aims for generating high center-of-mass energy colliding above 250 GeV. high-granularity electromagnetic calorimeter (ECAL) included system, mainly responsible the measurement of photon. A particle flow algorithm (PFA)-based ECAL solution will utilize about 400k channels/m <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sup> . Here, we...
A series of maleic acid modified imidazole derivatives (IM-MA, 2MI-MA and 2EI-MA) were synthesized via the Michael addition reaction (MA) with (IM), 2-methylimidazole (2-MI) 2-ethylimidazole (2-EI), respectively. 1H nuclear magnetic resonance (NMR), Fourier Transform Infrared (FTIR) spectra Elemental analysis (EA) used to verify structure derivatives. The as latent curing agents for epoxy resin (EP). Differential scanning calorimeter (DSC) under dynamic isothermal condition was study...
In this paper, a front-end electronics system based on charge sensitive amplifier (CSA) is designed to read out the signal of pure CsI (pCsI) crystal, which basic option Super Tau-Charm Facility (STCF) electromagnetic calorimeter (ECAL). By noise analysis and on-board testing, parameters readout circuit are optimized. Thus with large input capacitance avalanche photodiode (APD) significantly reduced. A level 675 electrons for alone 1025 S8664-0505 APD realized, satisfies project requirements.
Abstract Hadron calorimeter (HCAL) is an essential sub-detector of the baseline detector system for Circular Electron Positron Collider (CEPC). We plan to build Analog CALorimeter (AHCAL) prototype based on Particle Flow Algorithm (PFA). The AHCAL CEPC uses steel as absorber and scintillator tiles read out by Silicon Photo-Multipliers (SiPMs) sensitive medium. energy linearity resolution depend light yield uniformity It qualify entire production in order select with within 10%. An automated...
An imaging hadron calorimeter with digital readout (DHCAL) using the micro-pattern gaseous detector (MPGD) technology is one of options for Circular Electron Positron Collider (CEPC). The sensitive CEPC DHCAL required to be compact and highly efficient MIPs low hit multiplicity. A double-GEM a resistive WELL (RWELL) based on THGEM technique have been investigated as detector. 030 cm × 3 prototype "3 mm-1 mm" structure was built self-stretching study performance application DHCAL. read out...
The Dark Matter Particle Explorer (DAMPE) is being constructed as a scientific satellite to observe high energy cosmic rays in space. As main sub-detector of DAMPE, the BGO electromagnetic calorimeter provides wide measurement range deposition particles traversing detector and generates trigger information for selection module. There are 704 photomultiplier tube (PMT) dynode signals total generate sub-trigger signals, which bring difficulties design front end electronics (FEE) on...
As a future Higgs or Z factory, construction of the circular electron positron collider (CEPC) has been proposed to precisely measure bosons. A particle flow-oriented electromagnetic calorimeter (ECAL) and hadronic (HCAL) comprise baseline design for CEPC calorimetry system. The scintillator-tungsten ECAL (Sc-ECAL) prototype is being developed within working group. Sc-ECAL sampling consisting alternating absorber layers high granularity active layers. Each component layer studied optimized...
CEPC (Circular Electron and Positron Collider) is a large experiment facility proposed by Chinese particle physics community. One of its running option being the Higgs factory. Calorimeter main part this to measure jet energy. Semi-digital hadron calorimeter (SDHCAL) one options for measurement. GEM detector with high position resolution flexible configuration candidates active layer SDHCAL. The purpose paper provide feasible readout method GEM-based semi-digital calorimeter. A small-scale...
The detection of a high repetition rate weak signal is studied in this paper. Owing to the characteristics interest, both speed analog-to-digital converter (ADC) and low computational complexity data processing techniques are required for real-time detection. In paper, novel field programmable gate array (FPGA) based periodic technique presented. Cascaded comparators outside FPGA cascaded flip flops used implement one-bit ADC, which performs quantization first followed by sampling. Based on...
The Dark Matter Particle Explorer (DAMPE) is a scientific satellite designed to search for the clue of dark matter particles mission period at least 3 years. Two types readout ASICs, named VA160 and VATA160, are adopted front-end electronics (FEE) meet design specification. Total lot screening VATA160 utilized assist in achieving levels quality reliability commensurate with aerospace application. A test platform has been built provide comprehensive electric parameters acquisition during...