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GRB 2.0408B:A Three-episode Burst from a Precessing Jet

Research in Astronomy and Astrophysics 2023年第11期23卷 214-224页

作者： Zijian Zhang Yi-Han Iris Yin Chenyu Wang Xiangyu Ivy Wang Jun Yang Yan-Zhi Meng Zi-Ke liu Guo-Yin Chen Xiaoping Fu Huaizhong Gao Sihao li Yihui liu Xiangyun Long Yong-Chang Ma Xiaofan Pan Yuanze Sun Wei Wu Zirui Yang Zhizhen Ye Xiaoyu Yu Shuheng Zhao Xutao zheng Tao Zhou Qing-Wen Tang Qiurong Yan Rong Zhou Zhonghai Wang Hua Feng Ming Zeng Bin-Bin Zhang School of Astronomy and Space Science Nanjing UniversityNanjing 210093China School of physics Nanjing UniversityNanjing 210093China department of Astronomy Tsinghua UniversityBeijing 100084China Key Laboratory of Modern Astronomy and Astrophysics Nanjing UniversityMinistry of EducationNanjing 210093China School of Information Engineering Nanchang UniversityNanchang 330031China department of Engineering physics Tsinghua UniversityBeijing 100084China department of Health physics China Institute for Radiation ProtectionTaiyuan 300000China Key Laboratory of Radiation physics and Technology of Ministry of Education College of Physics of Sichuan UniversityChengdu 610065China School of Artificial Intelligence Nanjing UniversityNanjing 210093China Key Laboratory of Particle and Radiation Imaging Tsinghua UniversityMinistry of EducationBeijing 100084China department of Computer Science and Technology Nanjing UniversityNanjing 210093China School of Chemistry and Chemical Engineering Nanjing UniversityNanjing 210093China College of Engineering and applied Sciences Nanjing UniversityNanjing 210093China department of physics School of Physics and Materials ScienceNanchang UniversityNanchang 330031China Purple Mountain Observatory Chinese Academy of SciencesNanjing 210023China

Jet precession has previously been proposed to explain the apparently repeating features in the light curves of a few gamma-ray bursts(GRBs).In this paper,we further apply the precession model to a bright GRB 2.0408B by examining both its temporal and spectral consistency with the predictions of the *** one of the recently confirmed GRBs observed by our GRID CubeSat mission,GRB 2.0408B is noteworthy as it exhibits three apparently similar emission ***,the similarities are reinforced by their strong temporal correlations and similar features in terms of spectral evolution and spectral *** analysis demonstrates that these features can be well explained by the modulated emission of a Fast-Rise-Exponential-Decay(FRED)shape light curve intrinsically produced by a precessing jet with a precession period of 18.4_(-0.2.~(+0.2.s,a nutation period of11.1_(-0.2.~(+0.2.s and viewed *** study provides a straightforward explanation for the complex yet similar multiepisode GRB light curves.

关键词： gamma-rays:general (stars:)gamma-ray burst:individual(GRB 2.0408B) stars:jets

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液氩探测器在稀有事例探测中的应用和发展

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物理学报 2023年第5期72卷 42-55页

作者：郑昊哲刘圆圆王力程建平北京师范大学核科学与技术学院生态环境部北京师范大学锦屏极低辐射本底测量联合实验室射线束技术教育部重点实验室北京100875 北京师范大学物理学系北京100875

稀有事例探测是近几年热门的粒子物理前沿课题,如暗物质、无中微子双贝塔衰变、中微子-核子相干弹性散射等实验都在逐渐被规划和实施.进行稀有事例探测要求探测器有极佳的性能,同时对环境本底有很高的要求,因此探测器和相关材料的选择... 详细信息

稀有事例探测是近几年热门的粒子物理前沿课题,如暗物质、无中微子双贝塔衰变、中微子-核子相干弹性散射等实验都在逐渐被规划和实施.进行稀有事例探测要求探测器有极佳的性能,同时对环境本底有很高的要求,因此探测器和相关材料的选择是稀有事例探测的一个重要课题.液氩因为成本低、闪烁性能好、体积限制较小等优势成为稀有事例探测器的一种重要介质.经过几十年的发展,单相液氩闪烁体探测器和两相氩时间投影室成为两种常见的液氩探测器类型,并开始被国内外各实验组应用于稀有事例探测实验中.本文首先对两种常见的液氩探测器的原理和特性进行介绍,然后详细介绍国内外相关稀有事例探测实验组对液氩探测器的研究和应用现状以及未来规划,最后讨论未来液氩探测器在稀有事例探测中的应用前景和优化方向.

关键词：稀有事例探测闪烁体探测器时间投影室反符合测量

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间接驱动惯性约束聚变中的激光等离子体不稳定性

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中国科学：物理学、力学、天文学 2018年第6期48卷 21-36页

作者：杨冬李志超李三伟郝亮李欣郭亮邹士阳蒋小华彭晓世徐涛理玉龙郑春阳蔡洪波刘占军郑坚龚韬王哲斌黎航况龙钰李琦王峰刘慎业杨家敏江少恩张保汉丁永坤中国工程物理研究院激光聚变研究中心绵阳621900 中国科学技术大学近代物理系合肥230026 北京应用物理与计算数学研究所北京100088

间接驱动惯性约束聚变(Inertial Confinement Fusion,ICF)中,激光能量除了通过逆轫致机制被吸收和传输,还会激发各种参量不稳定性(受激布里渊散射(Stimulated Brillouin Scattering,SBS)、受激拉曼散射(Stimulated Raman Scattering,SRS)、双等离子体衰变(Two-Plasmon Decay,TPD)等),大幅降低激光-靶丸耦合效率并破坏辐射场对称性.因此,激光等离子体不稳定性是实现聚变点火的最大风险之一,研究、理解和抑制以SBS和SRS为主的激光等离子体不稳定性一直在激光聚变研究中占有重要地位.本文从激光(L)、等离子体(P)和不稳定性机制(Ⅰ)这三个方面介绍了激光间接驱动ICF框架下理解和抑制激光等离子体不稳定性(Laser Plasma Instability,LPI)的研究进展和机遇.

关键词：激光聚变神光激光等离子体不稳定性散射光

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同步加速器慢引出束流频谱定量分析及其应用

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原子能科学技术 2022年第9期56卷 1832-1839页

作者：叶文博姚红娟杨业刘晓宇李岩郑曙昕王学武关遐令王敏文刘卧龙王迪王茂成赵铭彤闫逸花王忠明清华大学粒子技术与辐射成像教育部重点实验室北京100084 清华大学先进辐射源及应用实验室北京100084 清华大学工程物理系北京100084 西北核技术研究所强脉冲辐射环境模拟与效应国家重点实验室陕西西安710024

引出束流的时间均匀性是同步加速器慢引出研究领域中的重要研究方向,优化时间均匀性需先判断引出束流不均匀性即束流纹波的主要来源。引出束流频谱在分析束流纹波时起关键作用,但常规的引出束流频谱分析仅通过频谱幅度判断主要的束流纹... 详细信息

引出束流的时间均匀性是同步加速器慢引出研究领域中的重要研究方向,优化时间均匀性需先判断引出束流不均匀性即束流纹波的主要来源。引出束流频谱在分析束流纹波时起关键作用,但常规的引出束流频谱分析仅通过频谱幅度判断主要的束流纹波来源,遇到宽频束流纹波时常规方法无法正确反映宽频纹波对时间均匀性的影响。为此,本文提出引出束流频谱定量分析方法,并将该方法应用于西安2.0 MeV质子应用装置同步加速器引出束流的时间均匀性的分析及优化中。该方法可正确反映宽频纹波对时间均匀性的影响,根据该方法可对不同来源的束流纹波进行分类,定量计算不同类型的束流纹波对不均匀性的贡献,实现量化比较不同类型纹波影响,明确需优化的目标。

关键词：同步加速器慢引出引出束流频谱时间均匀性束流纹波

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基于序贯概率比检验的爆炸物检测系统

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吉林大学学报（理学版） 2019年第3期57卷 653-657页

作者：刘轩郭勇景士伟李明非郑彦高亚东年瑞雪东北师范大学物理学院长春130024 四川警察学院刑事技术系四川泸州646000

设计一种基于标记中子方法的爆炸物检测系统,采用ING-2.型中子发生器与硅酸钇镥闪烁晶体(LYSO)γ探测器进行探测,并基于序贯概率比检验(SPRT)方法判别爆炸物.通过对干奶粉、硝铵(AMM)和TNT模拟物进行检测,分析计算测量γ能谱数据中C,N,... 详细信息

设计一种基于标记中子方法的爆炸物检测系统,采用ING-2.型中子发生器与硅酸钇镥闪烁晶体(LYSO)γ探测器进行探测,并基于序贯概率比检验(SPRT)方法判别爆炸物.通过对干奶粉、硝铵(AMM)和TNT模拟物进行检测,分析计算测量γ能谱数据中C,N,O三种元素的特征峰,将所得概率比结果与相应的设定阈值ln A和ln B进行比较.结果表明,SPRT方法可应用于爆炸物检测.

关键词：序贯概率比检验(SPRT) 爆炸物能谱标记中子

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A Search for Solar Axions and Anomalous Neutrino Magnetic Moment with the Complete Panda X-Ⅱ Data

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Chinese physics Letters 2021年第1期38卷 30-34页

作者： Xiaopeng Zhou Xinning Zeng Xuyang Ning Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu lisheng Geng Karl Giboni linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie li Huaxuan liu Jianglai liu Xiaoying Lu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Kaixiang Ni Jinhua Ning Xiangxiang Ren Changsong Shang Guofang Shen lin Si Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Pengwei Xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Dan Zhang Tao Zhang li Zhao Qibin zheng Jifang Zhou Ning Zhou INPAC School of Physics and AstronomyShanghai Jiao Tong Universityand Shanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China School of physics Beihang UniversityBeijing 100191China Shanghai Jiao Tong university Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai Jiao Tong UniversityShanghai 200240China School of physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear physics and Ion-Beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of physics Peking UniversityBeijing 100871China International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China department of physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of physics and Key Laboratory of Particle physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Institute of applied physics Chinese Academy of SciencesShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy physics Peking UniversityBeijing 100871China

We report a search for new physics signals using the low energy electron recoil events in the complete data set from PandaX-Ⅱ,in light of the recent event excess reported by XENON1 *** data correspond to a total exposure of 100.7 ton·day with liquid *** robust estimates of the dominant background spectra,we perform sensitive searches on solar axions and neutrinos with enhanced magnetic *** is found that the axionelectron coupling gAe2. for an axion mass less than 0.1 keV/c^(2. and the neutrino magnetic moment μv<4.9×10^(-11)μB at 90%confidence *** observed excess from XENON1 T is within our experimental constraints.

关键词： moment. excess estimates

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激光惯性约束聚变中光学汤姆逊散射研究进展

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强激光与粒子束 2020年第9期32卷 52-65页

作者：李志超赵航龚韬李欣杨冬蒋小华郑坚刘永刚刘耀远陈朝鑫李三伟李琦潘凯强郭亮理玉龙徐涛彭晓世吴畅书张桦森郝亮蓝可陈耀桦郑春阳古培俊王峰蔡洪波郑无敌邹士阳杨家敏江少恩张保汉朱少平丁永坤中国工程物理研究院激光聚变研究中心四川绵阳621900 北京应用物理与计算数学研究所北京100088 中国科学技术大学工程与应用物理系合肥230026

当前,激光惯性约束聚变在越来越接近点火的极端能量密度条件下,实验与模拟的偏离逐渐增大,一个关键原因是缺乏对黑腔等离子体状态及其影响黑腔能量学和内爆对称性的细致研究和判断。光学汤姆逊散射主动式、诊断精确、参数完备的优点,使... 详细信息

当前,激光惯性约束聚变在越来越接近点火的极端能量密度条件下,实验与模拟的偏离逐渐增大,一个关键原因是缺乏对黑腔等离子体状态及其影响黑腔能量学和内爆对称性的细致研究和判断。光学汤姆逊散射主动式、诊断精确、参数完备的优点,使之成为激光惯性约束聚变黑腔等离子体状态参数精密诊断的标准方法。中国面向激光惯性约束聚变研究的光学汤姆逊散射实验技术的发展与神光系列激光装置的建设和在其上开展的物理实验紧密相关。近年来,四倍频汤姆逊散射实验技术在神光III原型和100 kJ激光装置上相继建立,部分实验结果不仅加深了对激光惯性约束聚变靶物理的认识,还反映了实验条件对汤姆逊散射诊断的影响,促进了实验技术的精密化发展。在未来,还需要进一步发展多支路汤姆逊散射、五倍频汤姆逊散射和超热相干汤姆逊散射等新技术,面向点火黑腔条件,大幅提升激光等离子体状态参数的诊断精度,开展新物理机制的探索和研究,在激光惯性约束聚变和其他高能量密度物理科学领域发挥更重要的作用。

关键词：激光惯性约束聚变光学汤姆逊散射等离子体状态参数激光等离子体不稳定性

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Study of background from accidental coincidence signals in the PandaX-Ⅱexperiment

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Chinese physics C 2022年第10期46卷 11-24页

作者： Abdusalam Abdukerim Wei Chen Xun Chen Yunhua Chen Chen Cheng Xiangyi Cui Yingjie Fan Deqing Fang Changbo Fu Mengting Fu lisheng Geng Karl Giboni linhui Gu Xuyuan Guo Ke Han Changda He Di Huang Yan Huang Yanlin Huang Zhou Huang Xiangdong Ji Yonglin Ju Shuaijie li Huaxuan liu Jianglai liu Wenbo Ma Yugang Ma Yajun Mao Yue Meng Kaixiang Ni Jinhua Ning Xuyang Ning Xiangxiang Ren Changsong Shang lin Si Guofang Shen Andi Tan Anqing Wang Hongwei Wang Meng Wang Qiuhong Wang Siguang Wang Wei Wang Xiuli Wang Zhou Wang Mengmeng Wu Shiyong Wu Weihao Wu Jingkai Xia Mengjiao Xiao Pengwei Xie Binbin Yan Jijun Yang Yong Yang Chunxu Yu Jumin Yuan Ying Yuan Xinning Zeng Dan Zhang Tao Zhang li Zhao Qibin zheng Jifang Zhou Ning Zhou Xiaopeng Zhou School of physics and Astronomy Shanghai Jiao Tong UniversityMOE Key Laboratory for Particle Astrophysics and CosmologyShanghai Key Laboratory for Particle Physics and CosmologyShanghai 200240China Shanghai Jiao Tong university Sichuan Research Institute Chengdu 610213China Yalong River Hydropower Development Company Ltd.288 Shuanglin RoadChengdu 610051China School of physics Sun Yat-Sen UniversityGuangzhou 510275China Tsung-Dao Lee Institute Shanghai 200240China School of physics Nankai UniversityTianjin 300071China Key Laboratory of Nuclear physics and Ion-beam Application(MOE) Institute of Modern PhysicsFudan UniversityShanghai 200433China School of physics Peking UniversityBeijing 100871China School of physics Beihang UniversityBeijing 102206China Beijing Key Laboratory of Advanced Nuclear Materials and physics Beihang UniversityBeijing102206China School of physics and Microelectronics Zhengzhou UniversityZhengzhouHenan 450001China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China department of physics University of MarylandCollege ParkMaryland 20742USA School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of physics and Key Laboratory of Particle physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Shanghai Institute of applied physics Chinese Academy of SciencesShanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China Center for High Energy physics Peking UniversityBeijing 100871China

Ⅰ.INTRODUCTION The direct detection of dark matter particles,especially the weakly interacting massive particles(WIMPs),is being actively carried out by a couple of experiments worldwide[1].In recent years,the PandaX-Ⅱ experiment located in the China Jinping Underground Laboratory(CJPL)[1-3],which uses the technology of dual phase liquid xenon time projection chambers(TPCs),has pushed the limits of the cross section between WIMPs and nucleons to a new level for most of the possible WIMP masses;other experiments of the same type are also being performed[4–10].

关键词： dark matter xenon detector background accidental coincidence machine learning

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Measurement of the neutron total cross section of carbon at the Back-n white neutron beam of CSNS

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Nuclear Science and Techniques 2019年第9期30卷 73-82页

作者： Xing-Yan liu Yi-Wei Yang Rong liu Jie Wen Zhong-Wei Wen Zi-Jie Han Zhi-Zhou Ren Qi An Huai-Yong Bai Jie Bao Ping Cao Qi-Ping Chen Yong-Hao Chen Pin-Jing Cheng Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Min-Hao Gu Feng-Qin Guo Chang-Cai Han Guo-Zhu He Yong-Cheng He Yue-Feng He Han-Xiong Huang Wei-{2.ng Huang Xi-Ru Huang Xiao-Lu Ji Xu-Yang Ji Hao-Yu Jiang Wei Jiang Han-Tao Jing {2.ng Kang Ming-Tao Kang Bo {2. Lun {2. Qiang {2. Xiao {2. Yang {2. Yang {2. Shu-Bin liu Guang-Yuan Luan Ying-{2.n Ma Chang-Jun Ning Bin-Bin Qi Jie Ren Xi-Chao Ruan Zhao-Hui Song Hong Sun Xiao-Yang Sun Zhi-Jia Sun Zhi-Xin Tan Hong-Qing Tang Jing-Yu Tang Peng-Cheng Wang Qi Wang Tao-Feng Wang Yan-Feng Wang Zhao-Hui Wang {12. Wang Qing-Biao Wu Xiao-Guang Wu Xuan Wu {2.-Kun Xie Han Yi {2. Yu Tao Yu Yong-Ji Yu Guo-Hui Zhang Jing Zhang {2.n-Hao Zhang {2.-Ying Zhang Qing-Min Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-{2.ang Zhang Zhi-Yong Zhang Ying-Tan Zhao {2.ang Zhou Zu-Ying Zhou Dan-Yang Zhu Ke-Jun Zhu Peng Zhu Institute of Nuclear physics and Chemistry China Academy of Engineering Physics State Key Laboratory of Particle Detection and Electronics Chinese Academy of Sciences(CAS) department of Modern physics University of Science and Technology of China State Key Laboratory of Nuclear physics and Technology School of PhysicsPeking University Key Laboratory of Nuclear Data China Institute of Atomic Energy Institute of High Energy physics Chinese Academy of Sciences(CAS) Spallation Neutron Source Science Center university of South China Northwest Institute of Nuclear Technology department of Engineering and applied {2. University of Science and Technology of China Beihang university Xi’an Jiaotong university

To verify the performance of the neutron total cross-sectional spectrometer, the neutron total cross section of carbon is initially measured in the energy range of 1 eV to 2. MeV using the time-of-flight method. The measurement is performed at the Back-n white neutron source with a 76-m time-of-flight path using the China Spallation Neutron Source. A multilayer fast fission chamber with 2.5U and 2.8U is employed as the neutron detector. The diameter and thickness of the natural graphite sample are 70 mm and 40 mm, respectively. Signal waveforms are collected using a data acquisition system. Off-line data processing was used to obtain the neutron time-of-flight spectra and transmissions. The uncertainty of the counting statistics is generally approximately 3% for each bin in the energy range of 1–2. MeV. It is determined that the results for the neutron total cross section of carbon obtained using ^2.5U cells are in good agreement with the results obtained using 2.8U cells within limits of statistical uncertainty. Moreover, the measured total cross sections show good agreement with the broadening evaluated data.

关键词： CSNS Back-n white neutron source NTOX Neutron total cross section Carbon Multilayer fast fission chamber

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An improved evaluation of the neutron background in the PandaX-Ⅱ experiment

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Science China(physics,Mechanics & Astronomy) 2020年第3期63卷 54-63页

作者： QiuHong Wang Abdusalam Abdukerim Wei Chen Xun Chen YunHua Chen XiangYi Cui YingJie Fan DeQing Fang ChangBo Fu liSheng Geng Karl Giboni Franco Giuliani linHui Gu XuYuan Guo Ke Han ChangDa He Di Huang Yan Huang Yanlin Huang Zhou Huang Peng Ji Xiangdong Ji Yonglin Ju YiHui Lai Kun liang HuaXuan liu JiangLai liu WenBo Ma YuGang Ma YaJun Mao Yue Meng Parinya Namwongsa KaiXiang Ni JinHua Ning XuYang Ning XiangXiang Ren ChangSong Shang lin Si AnDi Tan AnQing Wang HongWei Wang Meng Wang SiGuang Wang Xiuli Wang Zhou Wang MengMeng Wu ShiYong Wu JingKai Xia MengJiao Xiao PengWei Xie BinBin Yan JiJun Yang Yong Yang ChunXu Yu Jumin Yuan Dan Zhang HongGuang Zhang Tao Zhang li Zhao QiBin {12. JiFang Zhou Ning Zhou XiaoPeng Zhou Shanghai Institute of applied physics Chinese Academy of SciencesShanghai 201800China INPAC and School of physics and Astronomy Shanghai Jiao Tong UniversityShanghai Laboratory for Particle Physics and CosmologyShanghai 200240China Yalong River Hydropower Development Company Ltd.Chengdu 610051China School of physics Nankai UniversityTianjin 300071China School of physics&International Research Center for Nuclei and Particles in the Cosmos&Beijing Key Laboratory of Advanced Nuclear Materials and physics Beihang UniversityBeijing 100191China School of Medical Instrument and Food Engineering University of Shanghai for Science and TechnologyShanghai 200093China Tsung-Dao Lee Institute Shanghai 200240China School of Mechanical Engineering Shanghai Jiao Tong UniversityShanghai 200240China School of physics Peking UniversityBeijing 100871China department of physics University of MarylandCollege ParkMaryland 20742USA School of physics and Key Laboratory of Particle physics and Particle Irradiation(MOE) Shandong UniversityJinan 250100China Center of High Energy physics Peking UniversityBeijing 100871China university of Chinese Academy of Sciences Beijing 100049China

In dark matter direct detection experiments,neutron is a serious source of background,which can mimic the dark matter-nucleus scattering *** this paper,we present an improved evaluation of the neutron background in the PandaX-II dark matter experiment by a novel *** of fully relying on the Monte Carlo simulation,the overall neutron background is determined from the neutron-induced high energy signals in the *** addition,the probability of producing a dark-matter-like background per neutron is evaluated with a complete Monte Carlo generator,where the correlated emission of neutron(s)andγ(s)in the(α,n)reactions and spontaneous fissions is taken into *** this method,the neutron backgrounds in the Run 9(2.-ton-day)and Run 10(2.-ton-day)data sets of PandaX-II are estimated to be(0.66±0.2.)and(0.47±0.2.)events,respectively.

关键词： dark matter direct detection xenon neutron background high energy gamma neutron generator

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