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Study of the response of 10B-doped MCP to wide-energy range neutrons from eV to MeV

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Nuclear Science and Techniques 2024年第8期35卷 132-141页

作者： Qiang Li Li‑Jiao Wang xiang‑Biao Qiu Jing‑Wen Li wei Xu Tao Li Ze‑Bin Lin Chang‑Jun Ning Yong‑Hao Chen Rui‑Rui Fan kang Sun Jing‑yu Tang Rong Zhang Han‑Tao Jing Bo Mei Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Zhen Chen Zeng‑Qi Cui An‑Chuan Fan Chang‑Qing Feng Fan‑Zhen Feng ke‑Qing Gao Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang hong Yi‑wei Hu Han‑xiong Huang wei‑Hua Jia Hao‑yu Jiang wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling kang Bo Li Chao Li Gong Li Jia‑Wen Li xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Guang‑yuan Luan Bin‑Bin Qi Jie Ren Zhi‑Zhou Ren xi‑Chao Ruan Zhao‑Hui Song Zhi‑xin Tan sheng‑Da Tang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑wei Wen xiao‑Guang Wu Xuan Wu Li‑Kun xie Yi‑wei Yang Han Yi Yong‑Ji yu Guo‑Hui Zhang Lin‑Hao Zhang Mo‑Han Zhang Qi‑wei Zhang xian‑Peng Zhang yu‑Liang Zhang yue Zhang Zhi‑Yong Zhang Mao‑yuan Zhao Lu‑Ping Zhou Zhi‑Hao Zhou ke‑Jun Zhu Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China North Night Vision Science&Technology(Nanjing)Research Institute Co.Ltd. Nanjing 211106China Sino‑French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China 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 State key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China USTC Archaeometry Lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Neutron-sensitive microchannel plates(nMCPs)have applications in neutron detection,including energy spectrum measurements,neutron-induced cross sections,and neutron imaging.10B-doped MCPs(B-MCPs)have attracted significant attention owing to their potential for exhibiting a high neutron detection efficiency over a large neutron energy *** spatial and temporal resolutions are useful for neutron energy-resolved ***,their practical applications still face many technical *** this study,a B-MCP with 10 mol%10B was tested for its response to wide-energy neutrons from eV to MeV at the Back-n white neutron source at the China Spallation Neutron *** neutron detection efficiency was calibrated at 1 eV,which is approximately 300 times that of an ordinary MCP and indicates the success of 10 B *** factors that caused the reduction in the detection efficiency were simulated and *** neutron energy spectrum obtained using B-MCP was compared with that obtained by other measurement methods,and showed very good consistency for neutron energies below tens of *** response is more complicated at higher neutron energy,at which point the elastic and nonelastic reactions of all nuclides of B-MCP gradually become *** is beneficial for the detection of neutrons,as it compensates for the detection efficiency of B-MCP for high-energy neutrons.

关键词： Neutron radiation image 10B-doped MCP Neutron response Wide-energy range neutrons

Nondestructive technique for identifying nuclides using neutron resonance transmission analysis at CSNS Back-n

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Nuclear Science and Techniques 2024年第1期35卷 178-187页

作者： sheng-Da Tang Yong-Hao Chen Jing-yu Tang Rui-Rui Fan Qiang Li Gong Li Dong Liu Zheng-Yao Jin xing-Zhu Cui Tian-xiang Chen Yi-wei Yang Rong Liu Han Yi Yang Li Zhen Yang Qi An Hao-Fan Bai Jiang-Bo Bai Jie Bao Ping Cao Qi-Ping Chen Zhen Chen Zeng-Qi Cui An-Chuan Fan Chang-Qing Feng Fan-Zhen Feng ke-Qing Gao Min-Hao Gu Chang-Cai Han Zi-Jie Han Guo-Zhu He Yong-Cheng He Yang hong Yi-wei Hu Han-xiong Huang wei-Hua Jia Hao-yu Jiang wei Jiang Zhi-jie Jiang Ling kang Bo Li Chao Li Jia-Wen Li xiao Li Jie Liu Shu-Bin Liu Guang-yuan Luan Chang-Jun Ning Bin-Bin Qi Jie Ren Zhi-Zhou Ren xi-Chao Ruan Zhao-Hui Song kang Sun Zhi-xin Tan Li-Jiao Wang Peng-Cheng Wang Zhao-Hui Wang Zhong-wei Wen xiao-Guang Wu Xuan Wu Li-Kun xie Yong-Ji yu Guo-Hui Zhang Lin-Hao Zhang Mo-Han Zhang Qi-wei Zhang xian-Peng Zhang yu-Liang Zhang yue Zhang Zhi-Yong Zhang Mao-yuan Zhao Lu-Ping Zhou Zhi-Hao Zhou ke-Jun Zhu Sino-French Institute of Nuclear Engineering and Technology Sun Yat-sen UniversityZhuhai 519082China Institute of High-Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230026China State key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China State key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China USTC Archaeometry Laboratory University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China

Nondestructive and noninvasive neutron assays are essential applications of neutron *** resonance transmission analysis(NRTA)is a powerful nondestructive method for investigating the elemental composition of an *** back-streaming neutron line(Back-n)is a newly built time-of-flight facility at the China Spallation Neutron Source(CSNS)that provides neutrons in the eV to 300 MeV range.A feasibility study of the NRTA method for nuclide identification was conducted at the CSNS Back-n via two test *** results demonstrate that it is feasible to identify different elements and isotopes in samples using the NRTA method at *** study reveals its potential future applications.

关键词： CSNS White neutron beam NRTA Nuclide identification Nondestructive method

10B-doped MCP detector developed for neutron resonance imaging at Back-n white neutron source

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Nuclear Science and Techniques 2024年第8期35卷 58-68页

作者： Qiang Li Li‑Jiao Wang Jing‑yu Tang xiang‑Biao Qiu Zhen Chen Mao‑yuan Zhao Chang‑Jun Ning Kai Pan wei Xu Tao Li Su‑Peng Lu Han Yi Rui‑Rui Fan Chang‑Qing Feng Rong Zhang xiao‑Yang Sun Qi An Hao‑Fan Bai Jiang‑Bo Bai Jie Bao Ping Cao Qi‑Ping Chen Yong‑Hao Chen Zeng‑Qi Cui An‑Chuan Fan Fan‑Zhen Feng Min‑Hao Gu Chang‑Cai Han Zi‑Jie Han Guo‑Zhu He Yong‑Cheng He Yang hong Yi‑wei Hu Han‑xiong Huang wei Jiang Zhi‑Jie Jiang Zheng‑Yao Jin Ling kang Bo Li Gong Li xiao Li Yang Li Jie Liu Rong Liu Shu‑Bin Liu Yi‑Na Liu Guang‑yuan Luan Jie Ren Zhi‑Zhou Ren xi‑Chao Ruan Zhao‑Hui Song kang Sun Zhi‑xin Tan sheng‑Da Tang Jin‑Cheng Wang Peng‑Cheng Wang Zhao‑Hui Wang Zhong‑wei Wen xiao‑Guang Wu Xuan Wu Cong xia Yong‑Ji yu Guo‑Hui Zhang Hang‑Chang Zhang Lin‑Hao Zhang Qi‑wei Zhang xian‑Peng Zhang yu‑Liang Zhang yue Zhang Zhi‑Yong Zhang Zhi‑Hao Zhou ke‑Jun Zhu Chong Zou Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State key Laboratory of Particle Detection and Electronics Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Dongguan Songshan Lake Future School Dongguan 523808China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China North Night Vision Science and Technology(Nanjing)Research Institute Co.Ltd Nanjing 211106China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China State key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Institute of Modern Physics Fudan UniversityShanghai 200433China key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China China Academy of Engineering Physics Institute of Nuclear Physics and ChemistryMianyang 621900China USTC archaeometry lab University of Science and Technology of ChinaHefei 230026China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China China Shipbuilding Trading Co. LtdBeijing 100044China

Neutron resonance imaging(NRI)has recently emerged as an appealing technique for neutron *** complexity surpasses that of conventional transmission imaging,as it requires a high demand for both a neutron source and ***,the progression of NRI technology has been sluggish since its inception in the 1980s,particularly considering the limited studies analyzing the neutron energy range above *** white neutron source(Back-n)at the China Spallation Neutron Source(CSNS)provides favorable beam conditions for the development of the NRI technique over a wide neutron energy range from eV to ***-sensitive microchannel plates(MCP)have emerged as a cutting-edge tool in the field of neutron detection owing to their high temporal and spatial resolutions,high detection efficiency,and low *** this study,we report the development of a 10B-doped MCP detector,along with its associated electronics,data processing system,and NRI experiments at the *** heavy elements such as gold,silver,tungsten,and indium can be easily identified in the transmission images by their characteristic resonance peaks in the 1–100 eV energy range;the more difficult medium-weight elements such as iron,copper,and aluminum with resonance peaks in the 1–100 keV energy range can also be *** particular,results in the neutron energy range of dozens of keV(Aluminum)are reported here for the first time.

关键词： Neutron resonance imaging 10B doped MCP detector White neutron source Sample nuclide identification

Stepped-up development of accelerator mass spectrometry method for the detection of ^(60)Fe with the HI-13 tandem accelerator

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Nuclear Science and Techniques 2024年第4期35卷 136-143页

作者： Yang Zhang sheng-Quan Yan Ming He Qing-Zhang Zhao Wen-Hui Zhang Chao-xin Kan Jian-Ming Zhou kang-Ning Li xiao-Fei Wang Jian-Cheng Liu Zhao-Hua Peng Zhuo Liang Ai-Ling Li Jian Zheng Qi-Wen Fan yun-Ju Li You-Bao Wang Zhi-hong Li Yang-Ping Shen Ding Nan wei Nan yu-Qiang Zhang Jia-Ying-Hao Li Jun-Wen Tian Jiang-Lin Hou Chang-xin Guo Zhi-Cheng Zhang Ming-Hao Zhu yu-Wen Chen yu-Chen Jiang Tao Tian Jin-Long Ma Yi-Hui Liu Jing-yu Dong Run-Long Liu Mei-yue-Nan Ma Yong-Shou Chen wei-Ping Liu Bing Guo China Institute of Atomic Energy P.O.Box 275(10)Beijing 102413China College of Science Southern University of Science and TechnologyShenzhen 518055China School of Physics Xi’an Jiaotong UniversityXi’an 710049China

The Moon provides a unique environment for investigating nearby astrophysical events such as *** samples retain valuable information from these events,via detectable long-lived“fingerprint”radionuclides such as^(60)*** this work,we stepped up the development of an accelerator mass spectrometry(AMS)method for detecting^(60)Fe using the HI-13tandem accelerator at the China Institute of Atomic Energy(CIAE).Since interferences could not be sufficiently removed solely with the existing magnetic systems of the tandem accelerator and the following Q3D magnetic spectrograph,a Wien filter with a maximum voltage of±60 kV and a maximum magnetic field of 0.3 T was installed after the accelerator magnetic systems to lower the detection background for the low abundance nuclide^(60)Fe.A 1μm thick Si_(3)N_(4) foil was installed in front of the Q3D as an energy *** particle detection,a multi-anode gas ionization chamber was mounted at the center of the focal plane of the ***,an^(60)Fe sample with an abundance of 1.125×10^(-10)was used to test the new AMS *** results indicate that^(60)Fe can be clearly distinguished from the isobar^(60)*** sensitivity was assessed to be better than 4.3×10^(-14)based on blank sample measurements lasting 5.8 h,and the sensitivity could,in principle,be expected to be approximately 2.5×10^(-15)when the data were accumulated for 100 h,which is feasible for future lunar sample measurements because the main contaminants were sufficiently separated.

关键词： Accelerator mass spectrometry Wien filter Isobar separation Supernovae Chang'e-5 lunar samples

Modular design of adaptive robust controller for strict-feedback stochastic nonlinear systems

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Frontiers of Electrical and Electronic Engineering in China 2006年第2期1卷 216-222页

作者： WANG Jun xi hong-sheng JI Hai-bo kang yu Department of Automation USTCHefei 230026China

A modular approach of the estimation-based design in adaptive linear control systems has been extended to the adaptive robust control of strict-feedback stochastic nonlinear systems with additive standard Wiener noises and constant unknown *** using Itô’s differentiation rule,nonlinear damping and adaptive Backstepping procedure,the input-to-state stable controller of global stabilization in probability is developed,which guarantees that system states are bounded and the system has a robust *** to Swapping technique,we develop two filters and convert dynamic parametric models into static ones to which the gradient update law is *** performance of the system is estimated by the norm of *** of simulation show the effectiveness of the control *** modular design,which has a concise hierarchy,is more flexible and versatile than a Lyapunov-based algorithm.

关键词： Wiener noises Itô’s differentiation rule Stabilization in probability Input-to-state stability Swapping technique

Exosomes derived from human umbilical cord mesenchymal stem cells alleviate Parkinson’s disease and neuronal damage through inhibition of microglia

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Neural Regeneration Research 2023年第10期18卷 2291-2300页

作者： Zhong-xia Zhang Yong-Jie Zhou Ping Gu wei Zhao hong-Xu Chen Ruo-yu Wu Lu-Yang Zhou Qing-Zhuo Cui Shao-kang Sun Lin-Qi Zhang ke Zhang hong-Jun Xu xi-Qing Chai sheng-Jun An Department of Neurology the First Affiliated Hospital of Hebei Medical UniversityShijiazhuangHebei ProvinceChina Research Center Hebei University of Chinese MedicineShijiazhuangHebei ProvinceChina

Microglia-mediated inflammatory responses have been shown to play a crucial role in Parkinson’s disease. In addition, exosomes derived from mesenchymal stem cells have shown anti-inflammatory effects in the treatment of a variety of diseases. However, whether they can protect neurons in Parkinson’s disease by inhibiting microglia-mediated inflammatory responses is not yet known. In this study, exosomes were isolated from human umbilical cord mesenchymal stem cells and injected into a 6-hydroxydopamine-induced rat model of Parkinson’s disease. We found that the exosomes injected through the tail vein and lateral ventricle were absorbed by dopaminergic neurons and microglia on the affected side of the brain, where they repaired nigral-striatal dopamine system damage and inhibited microglial activation. Furthermore, in an in vitro cell model, pretreating lipopolysaccharide-stimulated BV2 cells with exosomes reduced interleukin-1β and interleukin-18 secretion, prevented the adoption of pyroptosis-associated morphology by BV2 cells, and increased the survival rate of SH-SY5Y cells. Potential targets for treatment with human umbilical cord mesenchymal stem cells and exosomes were further identified by high-throughput microRNA sequencing and protein spectrum sequencing. Our findings suggest that human umbilical cord mesenchymal stem cells and exosomes are a potential treatment for Parkinson’s disease, and that their neuroprotective effects may be mediated by inhibition of excessive microglial proliferation.

关键词： 6-hydroxydopamine dopamine neurons exosomes inflammation mesenchymal stem cells microglia Parkinson’s disease pyroptosis

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高热值低热冲击热电池加热剂研究

火工品 2024年第3期 36-40页

作者：骆静上官小红孙现忠白银祥康二维钱玉敏宋卫兵何董琦西安北方庆华机电有限公司陕西西安710025 北京理工大学北京100081

为研发高热值、低热冲击的热电池加热剂,对不同类型活性铁粉的微观形貌、粒度分布、比表面积等进行表征分析,并对不同配方加热剂的成形性、可燃性、热值和燃烧温度等进行了测试。研究结果表明:活性铁粉的微观形貌和特性对加热剂的成形... 详细信息

为研发高热值、低热冲击的热电池加热剂,对不同类型活性铁粉的微观形貌、粒度分布、比表面积等进行表征分析,并对不同配方加热剂的成形性、可燃性、热值和燃烧温度等进行了测试。研究结果表明:活性铁粉的微观形貌和特性对加热剂的成形性和可燃性影响较大,珊瑚簇状的活性铁粉制备的加热剂成形性和可燃性最好,制备成的高热值加热剂燃烧时热冲击较小;同时,通过提高高氯酸钾的占比或在其中加入一定量的铝粉,可在热冲击无明显增大的情况下,大幅提高加热剂的热值。本研究有望为高比能量热电池产品的设计开发提供重要参考和指导意义。

关键词：热电池加热剂高热值热冲击

BZS1, a B-box Protein, Promotes Photomorphogenesis Downstream of Both Brassinosteroid and Light Signaling Pathways

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Molecular Plant 2012年第3期5卷 591-600页

作者： xi-Ying Fan yu Sun Dong-Mei Cao Ming-Yi Bal xiao-Min Luo hong-Juan Yang Chuang-Qi wei sheng-wei Zhu Ying Sun kang Chonga Zhi-Yong Wang Institute of Botany Chinese Academy of Sciences Beijing 100093 China Institute of Molecular Cell Biology College of Life Science Hebei Normal University Shijiazhuang Hebei 050016 China Graduate School of the Chinese Academy of Sciences Beijing 100049 China Institute of Horticulture Shanxi Academy of Agriculture Sciences Shanxi 030031 China Department of Plant Biology Carnegie Institution for Science Stanford CA 94305 USA

Photomorphogenesis is controlled by multiple signaling pathways, including the light and brassinosteroid （BR） pathways. BR signaling activates the BZR1 transcription factor, which is required for suppressing photomorphogen- esis in the dark, We identified a suppressor of the BR hypersensitive mutant bzrl-lD and named it bzrl-lD suppressorl- Dominant （bzsl-D）. The bzsl-D mutation was caused by overexpression of a B-box zinc finger protein BZS1, which is transcriptionally repressed by BZR1. Overexpression of BZS1 causes de-etiolation in the dark, short hypocotyls in the light, reduced sensitivity to BR treatment, and repression of many BR-activated genes. Knockdown of BZS1 by co-suppression partly suppressed the short hypocotyl phenotypes of BR-deficient or insensitive mutants. These results support that BZSl is a negative regulator of BR response. BZS1 overexpressors are hypersensitive to different wavelengths of light and loss of function of BZS1 reduces plant sensitivity to light and partly suppresses the constitutive photomorphogenesis 1 （cop1） mutant in the dark, suggesting a positive role in light response. BZS1 protein accumulates at an increased level after light treatment of dark-grown BZSl-OXplants and in the cop1 mutants, and BZS1 interacts with COP1 in vitro, suggesting that light regulates BZS1 through COPl-mediated ubiquitination and proteasomal degradation. These results demonstrate that BZS1 mediates the crosstalk between BR and light pathways.

关键词： photomorphogenesis light signaling Brassinosteroid BZS1 Arabidopsis

Robust and Non-fragile H_∞ Control for a Class of Uncertain Jump Linear Systems

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自动化学报 2006年第3期32卷 438-443页

作者： kang yu xi hong-sheng ZHANG Da-Li JI Hai-Bo Department of Automation University of Science and Technology of China Hefei Anhui 230026

This paper describes the synthesis of robust and non-fragile H∞ state feedback controllers for a class of uncertain jump linear systems with Markovian jumping parameters and state multiplicative noises. Under the assumption of a complete access to the norm-bounds of the system uncertainties and controller gain variations, sufficient conditions on the existence of robust stochastic stability and γ-disturbance attenuation H∞ property are presented. A key feature of this scheme is that the gain matrices of controller are only based on It, the observed projection of the current regime rt.

关键词：鲁棒控制 Markovian过程跳跃参数稳定性