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3rd International Conference on New Energy and Power Engineering, ICNEPE 2023

作者： Zhou, Wanxin Song, Kezhu Wu, Chuan Hu, Lingnan University of Science and Technology of China State Key Laboratory of Particle Detection and Electronics Hefei China

ISBN: (纸本)9798350393224

This paper presents the implementation and test results of a fully digitally controlled voltage regulator (VR) designed for high-performance microprocessors. The VR consists of two print circuit boards (PCB). The first PCB, referred to as the power board, is responsible for voltage conversion and incorporates components such as main power supply, output capacitor, and electronic load. The second PCB, referred to as the control board, is dedicated to signal sampling and digital control, including analog-to-digital converters (ADC) and field-programmable gate array (FPGA). The paper provides a detailed description of the implementation of the VR and presents the test results. © 2023 IEEE.

关键词： buck converter component digital control voltage regulator

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Performance of AC-LGAD strip sensors designed for the DarkSHINE experiment

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Nuclear Science and Techniques 2024年第11期35卷 152-163页

作者： Kang Liu Meng-Zhao Li Jun-Hua Zhang Wei-Yi Sun Yun-Yun Fan Zhi-Jun Liang Yu-Feng Wang Mei Zhao Kun Liu Tsung‑Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 201210China Key Laboratory for Particle Astrophysics and Cosmology(MOE) Shanghai Key Laboratory for Particle Physics and Cosmology(SKLPPC)Shanghai 200240China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China Institute of Nuclear and Particle Physics School of Physics and AstronomyShanghai Jiao Tong UniversityShanghai 200240China

The DarkSHINE experiment proposes a novel approach to single-electron-on-fixed-target exploration that focuses on the search for dark photons through their invisible decay into dark matter *** to this initiative is an advanced tracking detector designed to achieve exceptional sensitivity in the detection of light dark matter *** study evaluates the performance of several prototype AC-coupled low-gain avalanche diode(AC-LGAD)strip sensors specifically developed for the DarkSHINE tracking *** electrical properties of the sensors from two batches of wafers with different n^(+)doses are thoroughly *** and temporal resolutions are measured using an infrared laser *** spatial resolutions range from 6.5 to 8.2μm and from 8.8 to 12.3μm for the sensors from two distinct dose batches,each with a 100μm pitch ***,the sensors demonstrate time resolutions of 8.3 and 11.4 ps,underscoring the potential of AC-LGAD technology in enhancing the performance of the DarkSHINE tracking detector.

关键词： The DarkSHINE experiment Silicon-strip detector AC-LGAD sensor Spatial resolution Timing resolution

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Atomistic study on the microscopic mechanism of grain boundary embrittlement induced by small dense helium bubbles in iron

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Nuclear Science and Techniques 2024年第3期35卷 84-95页

作者： Lei Peng Yong-Jie Sun Jing-Yi Shi Yi-Fei Liu Shang-Ming Chen Liu-Liu Li State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China Science and Technology on Reactor System Design Technology Laboratory Nuclear Power Institute of ChinaChengdu 610213China

The helium bubbles induced by 14 MeV neutron irradiation can cause intergranular fractures in reduced activation ferritic martensitic steel,which is a candidate structural material for fusion *** order to elucidate the susceptibility of different grain boundaries(GBs)to helium-induced embrittlement,the tensile fracture processes of 10 types of GBs with and without helium bubbles in body-centered cubic(bcc)iron at the relevant service temperature of 600 K were investigated via molecular dynamics *** results indicate that in the absence of helium bubbles,the GBs studied here can be classified into two distinct categories:brittle GBs and ductile *** atomic scale analysis shows that the plastic deformation of ductile GB at high temperatures originates from complex plastic deformation mechanisms,including the Bain/Burgers path phase transition and deformation twinning,in which the Bain path phase transition is the most dominant plastic deformation ***,the presence of helium bubbles severely inhibits the plastic deformation channels of the GBs,resulting in a significant decrease in elongation at *** bubble-decorated GBs,the ultimate tensile strength increases with the increase in the misorientation ***,the coherent twin boundary∑3{112}was found to maintain relatively high fracture strength and maximum failure strain under the influence of helium bubbles.

关键词： Helium bubble Grain boundary Embrittlement Reduced activation ferritic martensitic steel Molecular dynamics Bain path

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Design and implementation of SiPM burn-in test experimental system for TAO detector

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Radiation detection Technology and Methods 2024年第2期8卷 1194-1201页

作者： Shouteng Xia Peng Hu Yinhong Zhang Sen Qian Guofu Cao Jie Yang Zhengzhou University Zhengzhou450001China Institute of High Energy Physics Chinese Academy of SciencesBeijing100049China State Key Laboratory of Particle Detection and Electronics Beijing100049China

Purpose The Taishan Neutrino Experiment(TAO),also known as JUNO-TAO,serves as a satellite experiment for the Jiangmen Underground Neutrino Experiment(JUNO).Its primary objective is to measure the neutrino energy spectrum of the reactor,which serves as input data for JUNO.A key component of TAO is the ton-size liquid-flash detector,utilizing high-detection-efficiency Silicon photomultipliers(SiPMs)capable of observing around 4500 photons per *** to the pivotal role of SiPMs in the experiment,it is crucial to conduct a burn-in test to ensure their stability under light-avoidance conditions prior to the main *** SiPM burn-in test is designed to verify the stable dark current of each *** To support the test,a specialized SiPM burn-in system is developed,intended to run stably for half a *** incorporates a complete hardware setup to ensure reliable power supply and current output for each SiPM *** the software side,PyQt5 serves as the Graphical User Interface(GUI)development tool,while the logic control script is written in pure Python,facilitating integration with various hardware interface *** data acquisition system encompasses modules for device control,data acquisition,storage,alarm,and logging,optimizing the system's stability and ease of *** and conclusions Throughout the burn-in test,the system achieves real-time display of SiPM current and promptly issues abnormal alarms when *** dynamic functionality demonstrates the system's stability and flexibility,effectively laying a solid foundation for the TAO experiment's success.

关键词： JUNO-TAO SiPM burn-in test Python DAQ

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Real-time data processing method for the feedback control system of the error field of the Keda Torus eXperiment around the gap 7

Real-time data processing method for the feedback control sy...

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7th IEEE Advanced Information Technology, Electronic and Automation Control Conference, IAEAC 2024

作者： Xu, Tianbo Song, Kezhu Song, Shuchen Li, Hong University of Science and Technology of China Anhui China The State Key Laboratory of Particle Detection and Electronics The University of Science and Technology of China Anhui China

ISBN: (纸本)9798350339161

This article describes the feedback control system of the error field in a reversed field pinch (RFP) device KTX. The system includes an electromagnetic probes(EMP) array, a real-time control system based on a field-programmable gate array (FPGA), a digital power amplifier (DPA) array as the actuator, and a feedback control coil. It takes full advantage of FPGA to fulfill a highspeed, real-time feedback control requirement. Zero drift elimination and real-time PID on FPGA make real-time feedback control possible. It successfully achieved the mission of error field control and made the magnetic field density drop more than 90 percent. © 2024 IEEE.

关键词： Feedback control

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Effect of multiple coulomb scattering on the beam tests of silicon pixel detectors

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Nuclear Science and Techniques 2024年第4期35卷 200-207页

作者： Lan-Kun Li Ming-Yi Dong Ze Gao Liang-Cheng-Long Jin Shu-Jun Zhao School of Physics and Microelectronics Zhengzhou UniversityZhengzhou 450001China State Key Laboratory of Particle Detection and Electronics(Institute of High Energy Physics CAS)Beijing 100049China University of Chinese Academy of Science Beijing 100049China University of South China Hengyang 421001China

In the research and development of new silicon pixel detectors,a collimated monoenergetic charged-particle test beam equipped with a high-resolution pixel-beam telescope is crucial for prototype verification and performance *** the beam energy is low,the effect of multiple Coulomb scattering on the measured resolution of the Device Under Test(DUT)must be considered to accurately evaluate the performance of the pixel chips and *** study aimed to investigate the effect of multiple Coulomb scattering on the measured resolution,particularly at low beam *** were conducted using Allpix^(2) to study the effects of multiple Coulomb scattering under different beam energies,material budgets,and telescope *** simulations also provided the minimum energy at which the effect of multiple Coulomb scattering could be *** with the results of a five-layer detector system tested with an electron beam at DESY,the simulation results were consistent with the beam test results,confirming the reliability of the simulations.

关键词： Silicon Pixel Detectors Beam Telescope Multiple Coulomb Scattering Spatial Resolution

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Study of ϕ(2170) at BESIII

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Nuclear and particle Physics Proceedings 2022年 318-323卷 108-111页

作者： Tan, Yaxing University of Science Technology of China State Key Laboratory of Particle Detection and Electronics

For e+e− collision between 2 and 3 GeV, excited states of ρ, ω and ϕ could be produced directly, some of them are not fully studied yet, especially several resonances around 2 GeV like ρ(2000), ρ(2150) and ϕ(2170)... 详细信息

For e⁺e⁻ collision between 2 and 3 GeV, excited states of ρ, ω and ϕ could be produced directly, some of them are not fully studied yet, especially several resonances around 2 GeV like ρ(2000), ρ(2150) and ϕ(2170). Theorists explain ϕ(2170) as a traditional ss¯ state, ss¯g hybrid, tetraquark state, ΛΛ¯ bound state, and ϕKK resonance state, and predict very diferent decay width with diferent nature of ϕ(2170). In review of experimental side, the number of decay modes of ϕ(2170) are limited, and there is inconsistencies on mass and width of ϕ(2170). With energy scan data collected by BESIII detector between 2.0 and 3.08 GeV, we performed PWA of e⁺e⁻→K⁺K⁻π⁰π⁰, and extracted lineshape of K^⁎(892)K¯^⁎(892), KK₁(1460), KK₁(1270) and KK₁(1400), and compared BESIII results that of theory prediction [1]. We will also report results on ϕ(2170)→ϕη^′ and ϕη, compare their ratio with that of hybrid prediction on ϕ(2170). We also present results on e⁺e⁻→K⁺K⁻ [2], ϕK⁺K⁻ [3] and ωη. Lineshape of e⁺e⁻→η^′π⁺π⁻ is used to study ρ(2000) and ρ(2150). © 2022

关键词： BESIII PWA tetraquark state ϕ(2170)

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Method for Delay Recovery of Trigger Signals 16

Method for Delay Recovery of Trigger Signals

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16th IEEE International Conference on Electronic Measurement and Instruments, ICEMI 2023

作者： Su, Chang Liang, Hao University of Science and Technology of China State Key Laboratory of Particle Detection and Electronics Department of Modern Physics Hefei China

ISBN: (纸本)9798350327144

This article presents a method of utilizing the SPARTAN-6 series Field-Programmable Gate Array (FPGA) to precisely measure the arrival time of trigger signals and subsequently recover them based on a predefined delay. In various nodes of the accelerator, it's necessary to delay the output of received trigger signals. To obtain an accurate recovery signal, we employ the carry chain within the FPGA to precisely measure the arrival time of the trigger signals. Simultaneously, we use the carry chain to accurately control the output delay. Ultimately, we generate a recovery signal with a time resolution of less than 120 ps. © 2023 IEEE.

关键词： Recovery

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FPGA-based position reconstruction method for neutron beam flux spatial distribution measurement in BNCT

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Nuclear Science and Techniques 2024年第3期35卷 96-108页

作者： Wei Jiang Ping Cao Yi-Ming Wu Xian-Ke Liu Zhu-Jun Fang Zhi-Yong Zhang Bin Shi Jun Chen State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China National Key Laboratory for Metrology and Calibration Techniques China Institute of Atomic EnergyBeijing 102413China

A new measurement method for the spatial distribution of neutron beam flux in boron neutron capture therapy(BNCT)is being developed based on the two-dimensional Micromegas *** address the issue of long processing times in traditional offline position reconstruction methods,this paper proposes a field programmable gate array based online position reconstruction method utilizing the micro-time projection chamber *** method encapsulates key technical aspects:a self-adaptive serial link technique built upon the dynamical adjustment of the delay chain length,fast sorting,a coordinate-matching technique based on the mapping between signal timestamps and random access memory(RAM)addresses,and a precise start point-merging technique utilizing a circular combined *** performance test of the selfadaptive serial link shows that the bit error rate of the link is better than 10-12 at a confidence level of 99%,ensuring reliable data *** experiment utilizing the readout electronics and Micromegas detector shows a spatial resolution of approximately 1.4 mm,surpassing the current method’s resolution level of 5 *** beam experiment confirms that the readout electronics system can obtain the flux spatial distribution of neutron beams online,thus validating the feasibility of the position reconstruction *** online position reconstruction method avoids traditional methods,such as bubble sorting and traversal searching,simplifies the design of the logic firmware,and reduces the time complexity from O(n2)to O(n).This study contributes to the advancement in measuring neutron beam flux for BNCT.

关键词： Position reconstruction FPGA Readout electronics Neutron flux spatial distribution

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Uncovering mechanism of photocatalytic performance enhancement induced by multivariate defects on SnS_(2)

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Nano Research 2023年第2期16卷 2102-2110页

作者： Sheng-Qi Guo Bo Yang Zhenzhong Hu Mengmeng Zhen Bingchuan Gu Boxiong Shen Tianjin Key Laboratory of Clean Energy and Pollutant Control School of Energy and Environmental EngineeringHebei University of TechnologyTianjin 300401China Anhui Province Key Laboratory of Pollutant Sensitive Materials and Environmental Remediation Huaibei Normal UniversityHuaibei 235000China State Key Laboratory of Particle Detection and Electronics University of Science&Technology of ChinaHefei 230026China

Defect engineering is recognized as an effective route to obtain highly active photocatalytic ***,the current understanding of defects is mainly limited to isolated atomic vacancy defects,ignoring the exploration of the functions of multivariate defects formed by the deletion of several adjacent atoms in photocatalytic ***,we prepared SnS2 nanostructures with the same morphology but different dominant defects,and by testing their photocatalytic performance,it was found that the multivariate defects can significantly improve the photocatalytic performance than isolated S *** experiments and theoretical calculations,we confirmed that the promotion of multivariate defects,especially“S-Sn-S”vacancy associates,on the photocatalytic performance is reflected in many aspects,such as the regulation of the energy band structure,the improvement of the charge separation efficiency,and the promotion of the adsorption and activation of guest ***2 with“S-Sn-S”vacancy associates exhibits excellent photocatalytic water purification *** the induction of“S-Sn-S”vacancy associates,phenol was thoroughly photocatalytically decomposed,further confirming its excellent *** work not only provides new insights into identifying advantage defects in the catalyst structure,but also offers new ideas for constructing highly active photocatalysts based on defect engineering.

关键词： SnS2 multivariate defects photocatalysis pollutants degradation reaction mechanism

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