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The design and performance of charged particle detector onboard the GECAM mission

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Radiation Detection Technology and Methods 2022年第1期6卷 53-62页

作者： Y.B.xu x.Q.li x.l.sun S.Yang H.Wang W.x.Peng x.H.liang K.Gong Y.Q.liu D.Y.Guo x.Y.Zhao C.Y.li Z.H.An J.J.He x.J.liu x.Y.Wen S.l.xiong Fan Zhang D.l.Zhang C.Y.Zhang C.Cai Z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao D.J.Hou Y.G.li G.li l.li x.F.li M.S.li F.J.lu H.lu B.Meng F.Shi J.Z.Wang Y.S.Wang H.Z.Wang x.Wen S.xiao Y.P.xu J.W.Yang Q.B.Yi S.N.Zhang C.M.Zhang F.Zhang Y.Zhao x.Zhou Key laboratory of Particle Astrophysics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China

Background The Gravitational wave highly energetic Electromagnetic Counterpart All-sky Monitor(GECAM)is dedicated to detecting gravitational wave gamma-ray *** is capable of all-sky monitoring over and discovering gamma-ray bursts and new radiation *** consists of two microsatellites,each equipped with 8 charged particle detectors(CPDs)and 25 gamma-ray detectors(GRDs).Purpose The CPD is used to measure charged particles in the space environment,monitor energy and flow intensity changes,and identify between gamma-ray bursts and space charged particle events in conjunction with *** CPD uses plastic scintillator as the sensitive material for detection,silicon photomultiplier array as the optically readable device,and the inlaid Am-241 radioactive source as the onboard calibration *** In this paper,we will present the working principle,physical design,functional implementation and preliminary performance test results of the *** a result,the energy range of electron,gamma-ray detection efficiency and dead time are tested to be better than the indexes required through the ground calibration experiment.

关键词： GECAM CPD SiPM

Quality assurance test and failure analysis of SiPM arrays of GECAM satellites

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Radiation Detection Technology and Methods 2022年第1期6卷 35-42页

作者： D.l.Zhang M.Gao x.l.sun x.Q.li Z.H.An x.Y.Wen C.Cai Z.Chang G.Chen C.Chen Y.Y.Du R.Gao K.Gong D.Y.Guo J.J.He D.J.Hou Y.G.li C.Y.li G.li l.li x.F.li M.S.li x.H.liang x.J.liu Y.Q.liu F.J.lu H.lu B.Meng W.x.Peng F.Shi H.Wang J.Z.Wang Y.S.Wang H.Z.Wang x.Wen S.xiao S.l.xiong Y.B.xu Y.P.xu S.Yang J.W.Yang Fan.Zhang S.N.Zhang C.Y.Zhang C.M.Zhang Fei Zhang x.Y.Zhao x.Zhou Institute of High Energy Physics CASBeijing 100049People’s Republic of China

Background The Gravitational wave high-energy Electromagnetic Counterpart All-sky Monitor(GECAM)satellite developed a SiPM-based gamma-ray detector to monitor the gravitational wave-related GRBs and guide subsequent observations in other wavelengths of *** As all the available SiPM devices belong to commercial grade,quality assurance tests need to be performed in accordance with the aerospace *** In the SiPM application of GECAM,quality assurance experiments were *** mechanism of the failure of SiPM devices was analyzed during the development *** Based on the quality assurance test results,the fnal pass rate of SiPM array was 95%.Based on the failure analysis,it was found that a piece of SiPM had a leakage channel after longtime operation due to device *** According to the accumulated experience,in the reliability test of SiPM,it is necessary to pay special attention to test the impedance of each pin of SiPM to ground and confrm that the power switch state of SiPM is controllable.

关键词： Gravitational waves Gamma-ray detectors Silicon photomultipliers Quality assurance test Failure analysis

Dedicated SiPM array for GRD of GECAM

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Radiation Detection Technology and Methods 2022年第1期6卷 63-69页

作者： D.l.Zhang x.l.sun Z.H.An x.Q.li x.Y.Wen K.Gong C.Cai Z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao D.Y.Guo J.J.He D.J.Hou Y.G.li C.Y.li G.li l.li x.F.li M.S.li x.H.liang x.J.liu Y.Q.liu F.J.lu H.lu B.Meng W.x.Peng F.Shi H.Wang J.Z.Wang Y.S.Wang H.Z.Wang x.Wen S.xiao S.l.xiong Y.B.xu Y.P.xu S.Yang1 x.Zhou J.W.Yang Fan Zhang S.N.Zhang C.Y.Zhang C.M.Zhang Fei Zhang x.Y.Zhao Institute of High Energy Physics CASBeijing 100049China State Key laboratory of Particle Detection and Electronics Beijing 100049China

Purpose The discovery of gravitational waves and gamma-ray bursts heralds the era of multi-messenger *** the adoption of two small satellites to achieve the all-sky monitoring of gamma-ray bursts,the gravitational wave highenergy electromagnetic counterpart all-sky monitor(GECAM)possesses a quasi-real-time early warning ability and plays an important role in positioning the sources of gravitational waves and in subsequent *** satellite of GECAM was fitted with 253-inch-diameter gamma-ray detectors(GRD),covering an energy range of 8–2 *** have adopted silicon photomultiplier tubes(SiPM)in lieu of photomultiplier tubes(PMT)to adapt to the dimensional limitations of *** A unique 3-inch circular SiPM array was *** this design,646×6 mm chips were arranged evenly in a circular manner with the seams filled with reflecting films,thus achieving satisfactory uniformity of light *** integrated pre-amplifier circuit on the back of the SiPM array adopted two-level grouping and summing;further,it achieved a satisfactory signal-to-noise *** high-gain and low-gain channels were adopted to achieve a large dynamic range,and two independent power supply units were used,where each unit can be closed separately,thus improving *** Performance studies show that this SiPM array meets the requirements of *** A 3-inch SiPM array have been developed that uses grouped summation,reflective films,a circular arrangement,two groups of independent power supplies,high-and low-gain signals,differential signal output technologies,*** solution can be used not only for GECAM,but also as a general solution for SiPM-based scintillation detectors.

关键词： SiPM GECAM Gamma-ray Signal-to-noise ratio Reflecting film Pre-amplifier

The design and performance of GRD onboard the GECAM satellite

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Radiation Detection Technology and Methods 2022年第1期6卷 43-52页

作者： Z.H.An x.l.sun D.l.Zhang S.Yang x.Q.li x.Y.Wen K.Gong x.H.liang x.J.liu Y.Q.liu Y.G.li S.l.xiong Y.B.xu Fan Zhang x.Y.Zhao C.Cai Z.Chang G.Chen C.Chen Y.Y.Du P.Y.Feng M.Gao R.Gao D.Y.Guo J.J.He D.J.Hou C.Y.li G.li l.li x.F.li M.S.li F.J.lu H.lu B.Meng W.x.Peng F.Shi H.Wang J.Z.Wang Y.S.Wang H.Z.Wang x.Wen S.xiao Y.P.xu J.W.Yang Q.B.Yi S.N.Zhang C.Y.Zhang C.M.Zhang Fei Zhang Y.Zhao x.Zhou CAS Institute of High Energy PhysicsBeijing 100049China State Key laboratory of Particle Detection and Electronics Beijing 100049China 3 Xiangtan UniversityXiangtan 411105China 4 Beijing Normal UniversityBeijing 110875China xiangtan University Xiangtan 411105China Beijing Normal University Beijing 110875China

Background Each GECAM satellite payload contains 25 gamma-ray detectors(GRDs),which can detect gamma-rays and particles and can roughly localize the Gamma-Ray Bursts(GRBs).GRD was designed using lanthanum bromide(laBr3)crystal as the sensitive material with the rear end coupled with silicon photomultiplier(SiPM)array for *** In aerospace engineering design of GRD,there are many key points to be *** this paper,we present the specific design scheme of GRD,the assembly and the performance test results of *** Based on Monte Carlo simulation and experimental test results,the specific schematic design and assembling process of GRD were *** being fully assembled,the GRDs were conducted performance tests by using radioactive source and also conducted random vibration *** and conclusion The test results show that all satellite-borne GRDs have energy resolutionllite in scientific *** random vibration test shows that GRD can maintain in a stable performance,which meets the requirement of spatial application.

关键词： lanthanum bromide scintillator SiPM array GECAM Gamma-ray detector Energy resolution

Differential China and California Fine Particulate Matter Effects on Allergic Sensitization to House Dust Mite in BAlB/c Mice

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Differential China and California Fine Particulate Matter Ef...

The technology for detection of gamma-ray burst with GECAM satellite

2017环境与公共健康学术会议暨中国环境科学学会环境医学与健康分会、中国毒理学会生化与分子毒理专业委员会2017年年会

作者： J.J.Zhang Fulgar Q.Zhang W.li l.l.Cui C.C.T.C Mar A.Castaneda D.E.Young K.Bein x.l.sun Z.Z.Zhang K.E.Pinkerton Sichuan University University of California at Davis Shandong University Jinan Municipal Center for Disease Control and Prevention

Background:Epidemiological studies have provided strong evidence that fine particulate matter(PM2.5) can exacerbate asthmatic symptoms and airway hyper-responsiveness(AHR) in *** have shown that PM2.5 induces innate immune responses and contributes to allergic sensitization,however whether differential PM2.5 enhances these processes remain unclear.

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Radiation Detection Technology and Methods 2022年第1期6卷 12-25页

作者： x.Q.li x.Y.Wen Z.H.An C.Cai Z.Chang G.Chen C.Chen Y.Y.Du M.Gao R.Gao K.Gong D.Y.Guo J.J.He D.J.Hou Y.G.li C.Y.li G.li l.li x.F.li M.S.li x.H.liang x.J.liu Y.Q.liu F.J.lu H.lu B.Meng W.x.Peng F.Shi x.l.sun H.Wang J.Z.Wang Y.S.Wang H.Z.Wang x.Wen S.xiao S.l.xiong Y.B.xu Y.P.xu S.Yang J.W.Yang Q.B.Yi D.l.Zhang Fan Zhang S.N.Zhang C.Y.Zhang C.M.Zhang Fei Zhang x.Y.Zhao Y.Zhao x.Zhou C.S.Zhang J.P.Yu l.Chang K.K.Zhang J.Huang Y.M.Chen x.B.Han Institute of High Energy Physics CASBeijing 100049China xiangtan University Xiangtan 411105China Beijing Normal University Beijing 110875China Beijing Glass Research Institute Beijing 101100China Innovation Academy for Microsatellites of CAS Shanghai 201204China

Introduction The main physical objective of the GECAM satellite is to detect gamma-ray bursts,which is related to gravitational waves of double compact object *** GECAM satellite also detects and investigates various bursts of high-energy celestial *** and methods In this study,we designed,developed and calibrated the payload and launched it into orbit with GECAM *** payload consists of the gamma ray detector(GRD,for detecting 4 keV–4 MeV x/γray),the charged particle detector(CPD,for detecting 150 keV–5 MeV charged particle),and the electronic box(EBOx).The all-sky field coverage is achieved via two 229-degree large-area satellites positioned 180 degrees apart and are on opposite sides of the *** satellite is equipped with 25 GRDs and 8 CPDs;thus,the satellite can identify charged particle bursts in ***-ray detectors adopt lanthanum bromide crystal technology combined with silicon *** is the first time that this technology was used massively in space *** The GECAM satellite can quickly determine the direction of gamma-ray bursts(positioning)via indexing and fitting method,while the transmit variability,energy spectrum and direction of the gamma-ray bursts guide subsequent observations through the Beidou-3 RDSS in quasi-real *** will play an important role in the study of high energy celestial bursts.

关键词： GECAM Gamma-ray burst lanthanum bromide crystal Silicon photomultiplier Beidou short message

基于CT定量的胸膜接触指数对早期非小细胞肺癌的预后价值及基因相关性研究

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国际医学放射学杂志 2018年第2期 246-246页

作者： J.lee Y.Cui x.l.sun B.l.li J.Wu D.W.li M.F.Gensheimer 韩雨 Department of Radiation Oncology Stanford University School of Medicine

摘要目的评价CT胸膜接触指数(PCI)对早期非小细胞肺癌(NSClC)的预后价值及基因表达的相关性研究。方法回顾性分析7个组群的NSClC病例。PCI的定义为肿瘤与

关键词：早期非小细胞肺癌预后价值接触指数相关性研究 CT

Output Consensus of Heterogeneous linear MASs via Adaptive Event-Triggered Feedback Combination Control

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IEEE/CAA Journal of Automatica Sinica 2025年第1期12卷 285-287页

作者： Shuo Yuan Chengpu Yu Jian sun the School of Automation Beijing Institute of Technology the Beijing Institute of Technology Chongqing Innovation Center

Dear Editor,This letter studies output consensus problem of heterogeneous linear multiagent systems over directed graphs. A novel adaptive dynamic event-triggered controller is presented based only on the feedback combination of the agent's own state and neighbors' output,which can achieve exponential output consensus through intermittent communication. The controller is obtained by solving two linear matrix equations, and Zeno behavior is excluded.

关键词： Directed graphs

Recycling Fe and improving organic pollutant removal via in situ forming magnetic core-shell Fe_(3)O_(4)@CaFe-lDH in Fe(Ⅱ)-catalyzed oxidative wastewater treatment

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Journal of Environmental Sciences 2025年第1期147卷 523-537页

作者： Ting He Jie sun liangwei Deng Jialin Ming Changwei Hu Key laboratory of Green Chemistry and Technology Ministry of EducationCollege of ChemistrySichuan UniversityChengdu 610064China Biogas Institute of Ministry of Agriculture and Rural Affairs Chengdu 610041China Inner Mongolia Key laboratory of Fine Organic Synthesis Inner Mongolia UniversityHohhot 010021China

Due to its high efficiency,Fe(Ⅱ)-based catalytic oxidation has been one of the most popular types of technology for treating growing organic pollutants.A lot of chemical Fe sludge alongwith various refractory pollutantswas concomitantly produced,whichmay cause secondary environmental problemswithout proper *** here innovatively proposed an effective method of achieving zero Fe sludge,reusing Fe resources(Fe recovery=100%)and advancing organics removal(final TOC removal>70%)simultaneously,based on the in situ formation of magnetic Ca-Fe layered double hydroxide(Fe_(3)O_(4)@CaFe-lDH)***(Ca^(2+)and Fe^(3+))concentration(≥30 mmol/l)and their molar ratio(Ca:Fe≥1.75)were crucial to the success of the *** nano Fe_(3)O_(4)was designed to be involved in the Fe(Ⅱ)-catalytic wastewater treatment process,and was modified by oxidation intermediates/products(especially those with COO-structure),which promoted the co-precipitation of Ca^(2+)(originated from Ca(OH)_(2)added after oxidation process)and byproduced Fe^(3+)cations on its surface to in situ generate core-shell Fe_(3)O_(4)@*** oxidation products were further removed during Fe_(3)O_(4)@CaFe-lDH material formation via intercalation and *** applicable to many kinds of organicwastewater,such as bisphenol A,methyl orange,humics,and biogas *** prepared magnetic and hierarchical CaFe-lDH nanocomposite material showed comparable application performance to the recently reported *** work provides a new strategy for efficiently enhancing the efficiency and economy of Fe(Ⅱ)-catalyzed oxidative wastewater treatment by producing high value-added lDHs materials.

关键词： CaFe layered double hydroxide Fe(Ⅱ)-catalytic oxidation Fe recycling Magnetic nanomaterial in situ formation Fe_(3)O_(4)modification