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Radiation Detection Technology and Methods 2023年第4期7卷 550-560页

作者： liangsheng huang Yuwen An Changdong Deng Yuan huang Shouyan Xu Dongguan Campus Institute of High Energy PhysicsChinese Academy of Sciences(CAS)Dongguan523803China Spallation Neutron Source Science Center Dongguan523803China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China

Background The China Spallation Neutron Source incorporates a rapid cycling synchrotron(RCS)that operates by accumulating protons at 80 MeV and subsequently accelerating them to 1.6 GeV within a time span of 20 *** beam is guided to striking the tungsten target for neutron *** As a space charge dominated machine,the RCS is subject to space charge effects and momentum spread,hereby influencing the tune *** address this issue,sextupole magnets,powered by two families of DC power supply,were initially employed to decrease the absolute value of chromaticity and to control the tune *** head-tail instability has been observed during the RCS beam *** The beam tests and simulations were conducted,revealing that tuning the chromaticity proved to be an effective mitigation ***,to achieve better control over the tune spread and further suppress the instability,the DC sextupole field has been upgraded to an AC sextupole field,aiming to provide dynamic for controlling the chromaticity over an acceleration *** and conclusion Thanks to the upgraded of AC field,the instability has been fully mitigated with beam power of 100 kW and the transmission in the RCS has been improved by~2%from 96 to 98%.With help of AC sextupole at present,the beam power in the RCS is increased to 140 kW.

关键词： China spallation neutron source Rapid cycling synchrotron Sextupole field Chromaticity Head-tail instability

Application of local Monte Carlo method in neutronics calculation of EAST radial neutron camera

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Plasma Science and Technology 2022年第2期24卷 172-179页

作者： liangsheng huang Liqun HU Luying NIU Mengjie ZHOU Bing HONG Kai LI Ruixue ZHANG Guoqiang ZHONG Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031People's Republic of China University of Science and Technology of China Hefei 230026People's Republic of China Sichuan Engineering Laboratory for Nuclear Facilities Decommissioning and Radwaste Management Nuclear Power Institute of ChinaChengdu 610005People's Republic of China

The Local Monte Carlo(LMC)method is used to solve the problems of deep penetration and long time in the neutronics calculation of the radial neutron camera(RNC)diagnostic system on the experimental advanced superconducting tokamak(EAST),and the radiation distribution of the RNC and the neutron flux at the detector positions of each channel are *** with the results calculated by the global variance reduction method,it is shown that the LMC calculation is reliable within the reasonable error *** calculation process of LMC is analyzed in detail,and the transport process of radiation particles is simulated in two *** the first step,an integrated neutronics model considering the complex window environment and a neutron source model based on EAST plasma shape are used to support the *** particle information on the equivalent surface is analyzed to evaluate the rationality of settings of equivalent surface source and *** on the characteristic that only a local geometric model is needed in the second step,it is shown that the LMC is an advantageous calculation method for the nuclear shielding design of tokamak diagnostic systems.

关键词： equivalent surface source radial neutron camera EAST local Monte Carlo method

Insights into ionic association boosting water oxidation activity and dynamic stability

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Journal of Energy Chemistry 2024年第2期89卷 99-109,I0004页

作者： Zanling huang Shuqi Zhu Yuan Duan Chaoran Pi Xuming Zhang Abebe Reda Woldu Jing-Xin Jian Paul K.Chu Qing-Xiao Tong liangsheng Hu Xiangdong Yao Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063GuangdongChina Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515063GuangdongChina State Key Laboratory of Refractories and Metallurgy and Institute of Advanced Materials and Nanotechnology Wuhan University of Science and TechnologyWuhan 430081HubeiChina Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongTat Chee AvenueKowloonHong KongChina School of Advanced Energy Sun Yat-sen University(Shenzhen)Shenzhen 518107GuangdongChina

There have been reports about Fe ions boosting oxygen evolution reaction(OER)activity of Ni-based catalysts in alkaline conditions,while the origin and reason for the enhancement remains ***,we attempt to identify the activity improvement and discover that Ni sites act as a host to attract Fe(Ⅲ)to form Fe(Ni)(Ⅲ)binary centres,which serve as the dynamic sites to promote OER activity and stability by cyclical formation of intermediates(Fe(Ⅲ)→Fe(Ni)(Ⅲ)→Fe(Ni)-OH→Fe(Ni)-O→Fe(Ni)OOH→Fe(Ⅲ))at the electrode/electrolyte interface to emit O_(2).Additionally,some ions(Co(Ⅱ),Ni(Ⅱ),and Cr(Ⅲ))can also be the active sites to catalyze the OER process on a variety of *** Fe(Ⅲ)-catalyzed overall water-splitting electrolyzer comprising bare Ni foam as the anode and Pt/Ni-Mo as the cathode demonstrates robust stability for 1600 h at 1000 mA cm^(-2)@~1.75 *** results provide insights into the ioncatalyzed effects boosting OER performance.

关键词： Oxygen evolution reaction Fe(Ⅲ)-catalysis Ni-Fe binary active centers Ion-catalyzed effects Robust stability

中国散裂中子源伴生质子辐照实验平台及其技术参数的确定

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现代应用物理 2024年第2期15卷 94-102页

作者：谭志新敬罕涛樊瑞睿黄良生蒋伟李强何泳成王林于永积宁常军黄蔚玲邱瑞阳曾磊孙晓阳曹秀霞马娜李论散裂中子源科学中心加速器技术部广东东莞523803 中国科学院高物理研究所东莞研究部北京100049

为了利用负氢离子加速器中伴随产生的质子成分,中国散裂中子源(China Spallation Neutron Source,CSNS)在直线加速器末端建设了伴生质子辐照实验平台(associated protons experimental platform,APEP)。为了确定其性能参数,采用散射测... 详细信息

为了利用负氢离子加速器中伴随产生的质子成分,中国散裂中子源(China Spallation Neutron Source,CSNS)在直线加速器末端建设了伴生质子辐照实验平台(associated protons experimental platform,APEP)。为了确定其性能参数,采用散射测量、束斑照相、同位素活化法等实验方法对伴生质子辐照实验平台的主要参数进行了刻度。实验证实,该辐照平台可以提供的质子能量范围为10~80 MeV,束斑分布均匀,束流强度范围为1.2×10^(7)~4.0×10^(9) cm^(-2)·s^(-1)。伴生质子辐照实验平台运行稳定,每年提供超过5000 h的束流时间,可以满足宇航器件可靠性测试、探测器刻度、辐照育种以及材料抗辐照特性测试等多种应用需求。

关键词：中国散裂中子源伴生质子束负氢离子能量刻度参数测试

CSNS/RCS中的阻抗和束流不稳定性(英文)

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强激光与粒子束 2013年第2期25卷 465-470页

作者：刘瑜冬黄良生王生王娜李勇中国科学院高能物理研究所北京100049

中国散裂中子源(CSNS)的快循环同步加速器(RCS)是一台强流质子加速器,其束流平均功率达到100kW。在此强流加速器中,真空部件的阻抗是引起束流不稳定的主要原因,它严重限制了束流强度及品质。对CSNS/RCS设计中的各种真空部件阻抗进行了... 详细信息

中国散裂中子源(CSNS)的快循环同步加速器(RCS)是一台强流质子加速器,其束流平均功率达到100kW。在此强流加速器中,真空部件的阻抗是引起束流不稳定的主要原因,它严重限制了束流强度及品质。对CSNS/RCS设计中的各种真空部件阻抗进行了详细计算,并以计算结果为出发点,理论分析了各种不稳定性强弱,确定了各种不稳定性发生的阻抗阈值,为真空部件结构设计提供了参考。对比较严重的电阻壁阻抗,采用阻抗壁尾场模型进行跟踪模拟,得到不稳定性增长率与理论计算值符合较好。自然色品有助于束流稳定,加入自然色品后模拟,电阻壁不稳定性消失。

关键词：中国散裂中子源快循环同步加速器阻抗不稳定性阻抗壁

《未成年人保护法》修订背景下未成年人犯罪预防研究——以K市126名未成年罪犯为样本

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湖北警官学院学报 2020年第3期33卷 15-24页

作者：黄良盛海南刚峰律师事务所海南海口570125

《未成年人保护法》修订能更好地满足未成年人保护的需要,有利于增强这部法律的科学性与可操作性,为解决新形势下未成年人保护存在的问题提供法治保障。调查显示,未成年人犯罪的主要特征表现为故意犯罪较多、犯罪呈现出团伙化特征、犯... 详细信息

《未成年人保护法》修订能更好地满足未成年人保护的需要,有利于增强这部法律的科学性与可操作性,为解决新形势下未成年人保护存在的问题提供法治保障。调查显示,未成年人犯罪的主要特征表现为故意犯罪较多、犯罪呈现出团伙化特征、犯罪低龄化趋势明显、再犯率较高、罪犯的文化程度偏低等。未成年人犯罪既有个人和家庭原因,也有学校和社会原因。为实现对未成年人犯罪的有效预防,促进他们健康全面地成长,结合《未成年人保护法》修订草案的主要内容,有必要开展未成年人自我保护教育,增强自觉预防犯罪的意识和能力;优化家庭教育,营造积极、健康、愉快的家庭氛围;注重学校教育,实现对未成年人犯罪的有效预防;整合社会各方力量,为未成年人健康成长营造良好环境。

关键词：未成年人犯罪预防对策自我教育家庭教育学校教育

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电子商务纠纷在线仲裁的制度构建研究

山东商业职业技术学院学报 2021年第3期21卷 70-75页

作者：黄良盛海南刚峰律师事务所海南海口570125

“互联网+”时代,电子商务交易频繁,构建电子商务纠纷在线仲裁制度日益迫切。电子商务纠纷在线仲裁有比较明显的优势。目前需要解决的问题主要包括在线仲裁具体的流程设计、在线仲裁的制度化与规范化等方面。要从在线仲裁协议的达成,在... 详细信息

“互联网+”时代,电子商务交易频繁,构建电子商务纠纷在线仲裁制度日益迫切。电子商务纠纷在线仲裁有比较明显的优势。目前需要解决的问题主要包括在线仲裁具体的流程设计、在线仲裁的制度化与规范化等方面。要从在线仲裁协议的达成,在线仲裁人员的选任、申请和受理、审理和裁决、裁决执行等方面完善工作流程,并制定统一规则,促进电子商务纠纷在线仲裁的制度化与规范化;另外,需加大宣传力度,提高其公信力和影响力。

关键词：电子商务纠纷在线仲裁在线仲裁地点在线仲裁人员选任电子证据

300 MeV质子同步加速器概念设计优化（英文）

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原子核物理评论 2017年第2期34卷 158-163页

作者：安宇文纪红飞王生黄良生中国科学院高能物理研究所北京100049 东莞中子科学中心广东东莞523803

目前处于设计阶段的哈尔滨工业大学空间辐照效应装置,其核心部件是由1台10 MeV的注入器、1台300MeV的同步加速器以及输运线构成的加速器装置。同步加速器中引出的质子束流被用于辐照研究。基于装置的概念设计,优化了其同步加速器部分的... 详细信息

目前处于设计阶段的哈尔滨工业大学空间辐照效应装置,其核心部件是由1台10 MeV的注入器、1台300MeV的同步加速器以及输运线构成的加速器装置。同步加速器中引出的质子束流被用于辐照研究。基于装置的概念设计,优化了其同步加速器部分的设计。设计了新的磁聚焦结构,优化了基于新的磁聚焦结构的多圈注入系统的凸轨变化模式,提高了注入效率。为了更好地优化引出束流的时间结构,慢引出系统采用了RF knock-out的方法。为了满足精准辐照的要求,研究了RF Kicker的频率调制,发现RF Kicker的双频调制能使得引出束流更均匀。

关键词：太空辐照磁聚焦结构设计多圈注入慢引出 RF knock-out方法

Designing Electrocatalysts for High-Current-Density Freshwater/Seawater Splitting

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Renewables 2024年第1期2卷 2-24页

作者： Madiha Rafiq Zanling huang Chaoran Pi liangsheng Hu Fushen Lu Kaifu Huo Paul KChu Department of Chemistry and Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province Shantou UniversityShantou 515063 Wuhan National Laboratory for Optoelectronics(WNLO) School of Optical and Electronic InformationHuazhong University of Science and TechnologyWuhan 430074 Chemistry and Chemical Engineering Guangdong Laboratory Shantou 515061 Research Institute of Huazhong University of Science and Technology in Shenzhen Shenzhen 518063 Department of Physics Department of Materials Science and Engineeringand Department of Biomedical EngineeringCity University of Hong KongKowloonHong KongChina

Electrocatalytic water splitting is crucial to renewable and clean hydrogen *** high efficiency and stability in hydrogen generation by freshwater/seawater electrolysis at a high current density(HCD)using low-cost electrode materials is of utmost importance for the future hydrogen ***,conventional freshwater/seawater electrolysis suffers from low current density due to inefficient electrocatalysts and competitive reactions of the chlorine evolution reaction(ClER),consequently hampering its industrial *** surface and interface engineering techniques are essential for the development of efficient and long-lasting electrodes for freshwater and seawater electrolysis at *** the review,we begin by discussing the fundamental aspects of freshwater/seawater splitting,focusing on recent advancements and strategies to increase the efficiency at *** then comprehensively discuss the rational design strategies for the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)at HCD together with the associated fundamental electrode reactions by considering the thermodynamic and kinetic aspects of the catalytic efficiency,selectivity,and corrosion *** is followed by a discussion of some existing issues and limitations of HCD freshwater/seawater splitting and viable ***,the issues facing the field and possible future research directions for efficient large-scale industrial water splitting are discussed.

关键词： electrocatalytic water splitting HER OER high current density catalyst design strategy

L-regularly Presemiopen Sets and S-semicontinu-ity

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L-regularly Presemiopen Sets and S-semicontinu-ity