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一种微带/共面波导混合结构宽带定向耦合器的设计

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电波科学学报 2008年第6期23卷 1204-1208页

作者：成际镇程崇虎南京邮电大学通信与信息工程学院江苏南京210003

提出一种微带/共面波导混合结构宽带定向耦合器的设计方案,该方案通过利用微带/槽线的不同耦合结构来实现同相耦合和反相耦合,并将其结合起来从而构成一个宽带的定向耦合器。利用电磁仿真软件IE3D进行了仿真设计,制作了实验样品,给出了... 详细信息

提出一种微带/共面波导混合结构宽带定向耦合器的设计方案,该方案通过利用微带/槽线的不同耦合结构来实现同相耦合和反相耦合,并将其结合起来从而构成一个宽带的定向耦合器。利用电磁仿真软件IE3D进行了仿真设计,制作了实验样品,给出了样品的测量数据。结果表明:该定向耦合器具有接近一个倍频程的工作带宽,在工作频带内有着良好的幅相输出,同时两隔离端口之间具有良好的隔离度指标。

关键词：定向耦合器宽带微带线共面波导

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

Measurement of the ^(232)Th(n,f)cross section in the 1-200 MeV range at the CSNS Back-n

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Nuclear Science and Techniques 2023年第8期34卷 142-153页

作者： Zhi-Zhou Ren Yi-Wei Yang Yong-Hao Chen Rong Liu Bang-jiao Ye jie Wen Hai-Rui Guo Zi-jie Han Qi-Ping Chen Zhong-Wei Wen Wei-Li Sun Han Yi Xing-Yan Liu Tao Ye jiang-Bo Bai Qi An jie Bao Yu Bao Ping Cao Hao-Lei Chen zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao Min-Hao Gu Chang-Cai Han Guo-Zhu He Yong-cheng He Yang Hong Yi-Wei hu Han-Xiong huang Xi-Ru huang Hao-Yu jiang Wei jiang Zhi-jie jiang Han-Tao jing Ling Kang Bo Li Chao Li jia-Wen Li Qiang Li Xiao Li Yang Li jie Liu Shu-Bin Liu Ze Long Guang-yuan Luan Chang-Jun Ning Meng-Chen niu Bin-Bin Qi jie Ren Xi-Chao Ruan Zhao-hui Song Kang Sun Zhi-jia Sun Zhi-Xin Tan jing-Yu Tang Xin-Yi Tang Bin-Bin Tian Li-jiao Wang Peng-cheng Wang Zhao-hui Wang Xiao-Guang Wu Xuan Wu Li-Kun Xie Xiao-Yun Yang Li Yu Tao Yu Yong-ji Yu Guo-hui Zhang Lin-Hao Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Institute of High Energy Physics Chinese Academy of Sciences(CAS)Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China Institute of Applied Physics and Computational Mathematics Beijing 100088China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230027China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China School of Nuclear Science and Technology University of Science and Technology of ChinaHefei 230027China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijingChina Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China

The ^(232)Th(n,f)cross section is very important in basic nuclear physics and applications based on the Th/U fuel *** the time-of-flight method and a multi-cell fast-fission ionization chamber,a novel measurement of the^(232)Th(n,f)cross sec-tion relative to^(235)U in the 1–200 MeV range was performed at the China Spallation Neutron Source Back-n white neutron source(Back-n).The fission event-neutron energy spectra of^(232)Th and^(235)U fission cells were measured in the single-bunch *** 232Th/235U fission cross-sectional ratios were obtained,and the measurement uncertainties were 2.5–3.7%for energies in the 2–20 MeV range and 3.6–6.2%for energies in the 20–200 MeV ***^(232)Th(n,f)cross section was obtained by introducing the standard cross section of^(235)U(n,f).The results were compared with those of previous theoreti-cal calculations,measurements,and *** measured 232Th fission cross section agreed with the main evaluation results in terms of the experimental uncertainty,and 232Th fission resonances were observed in the 1–3 MeV *** present results provide^(232)Th(n,f)cross-sectional data for the evaluation and design of Th/U cycle nuclear systems.

关键词： 232Th(n f)cross section Fast-fission ionization chamber Back-n white neutron source

Back-n white neutron source at CSNS and its applications

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Nuclear Science and Techniques 2021年第1期32卷 95-104页

作者： jing-Yu Tang Qi An jiang-Bo Bai jie Bao Yu Bao Ping Cao Hao-Lei Chen Qi-Ping Chen Yong-Hao Chen zhen Chen Zeng-Qi Cui Rui-Rui Fan Chang-Qing Feng Ke-Qing Gao Xiao-Long Gao Min-Hao Gu Chang-Cai Han Zi-jie Han Guo-Zhu He Yong-cheng He Yang Hong Yi-Wei hu Han-Xiong huang Xi-Ru huang Hao-Yu jiang Wei jiang Zhi-jie jiang Han-Tao jing Ling Kang Bo Li Chao Li jia-Wen Li Qiang Li Xiao Li Yang Li jie Liu Rong Liu Shu-Bin Liu Xing-Yan Liu Ze Long Guang-yuan Luan Chang-Jun Ning Meng-Chen niu Bin-Bin Qi jie Ren Zhi-Zhou Ren Xi-Chao Ruan Zhao-hui Song Kang Sun Zhi-jia Sun Zhi-Xin Tan Xin-Yi Tang Bin-Bin Tian Li-jiao Wang Peng-cheng Wang Zhao-hui Wang Zhong-Wei Wen Xiao-Guang Wu Xuan Wu Li-Kun Xie Xiao-Yun Yang Yi-Wei Yang Han Yi Li Yu Tao Yu Yong-ji Yu Guo-hui Zhang Lin-Hao Zhang Qi-Wei Zhang Xian-Peng Zhang Yu-Liang Zhang Zhi-Yong Zhang Lu-Ping Zhou Zhi-Hao Zhou Ke-Jun Zhu 无 State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Institute of Nuclear Physics and Chemistry China Academy of Engineering PhysicsMianyang 621900China Key Laboratory of Nuclear Data China Institute of Atomic EnergyBeijing 102413China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Spallation Neutron Source Science Center Dongguan 523803China State Key Laboratory of Nuclear Physics and Technology School of PhysicsPeking UniversityBeijing 100871China Northwest Institute of Nuclear Technology Xi’an 710024China University of Chinese Academy of Sciences Beijing 100049China Department of Engineering and Applied Physics University of Science and Technology of ChinaHefei 230026China State Key Laboratory of Particle Detection and Electronics University of Science and Technology of ChinaHefei 230026China The CSNS Back-n Collaboration

Back-streaming neutrons from the spallation target of the China Spallation Neutron Source(CSNS)that emit through the incoming proton channel were exploited to build a white neutron beam facility(the so-called Back-n white neutron source),which was completed in March *** Back-n neutron beam is very intense,at approximately 29107 n/cm2/s at 55 m from the target,and has a nominal proton beam with a power of 100 kW in the CSNS-I phase and a kinetic energy of 1.6 GeV and a thick tungsten target in multiple slices with modest moderation from the cooling water through the *** addition,the excellent energy spectrum spanning from 0.5 eV to 200 MeV,and a good time resolution related tothe time-of-flight measurements make it a typical white neutron source for nuclear data measurements;its overall performance is among that of the best white neutron sources in the *** with advanced spectrometers,detectors,and application utilities,the Back-n facility can serve wide applications,with a focus on neutron-induced cross-sectional *** article presents an overview of the neutron beam characteristics,the experimental setups,and the ongoing applications at Backn.

关键词： White neutron source Nuclear data measurements Experimental setups Neutron applications

兔肝血管插管技术及兔VX2肝癌超声、DSA表现的实验研究

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实用放射学杂志 2005年第2期21卷 113-116页

作者：刘振堂郭万亮戴社教张大鲲胡洪兵周斌毛继刚史步进陈凯程丽丽张亚红李迎春牛风枝西安交通大学第二医院影像中心西安交通大学第二医院超声室陕西安康中心医院放射科兰州医学院第一附属医院骨科陕西蒲城创伤医院放射科西安交通大学第二医院影像中心陕西西安710004

目的　探讨兔肝血管的解剖、插管技术及兔VX2 肝癌的超声、DSA表现的特点。方法　采用经开腹注入法接种VX2 瘤株于 45只新西兰大白兔,于种植后第 7、10、14、18、23天利用彩超对肿瘤的生长进行检测,于接种后第 23天,随机对 10只兔肝癌... 详细信息

目的　探讨兔肝血管的解剖、插管技术及兔VX2 肝癌的超声、DSA表现的特点。方法　采用经开腹注入法接种VX2 瘤株于 45只新西兰大白兔,于种植后第 7、10、14、18、23天利用彩超对肿瘤的生长进行检测,于接种后第 23天,随机对 10只兔肝癌最大径行超声和病理结果作对照。于种植后第 3周采用Seldinger法穿刺股动脉,并利用 3F微导管与微导丝对兔肝血管插管并造影。结果　彩超检测有 40只成功接种,VX2 肝癌在超声上表现为低回声伴声晕的肿块,彩色多普勒可见肿块周边血供丰富,超声与病理对照结果无统计学差异(Ρ>0. 05)。并对 45只进行血管造影中, 10只超选择至肝固有动脉, 30只插管于肝总动脉, 2只导管置于腹腔干, 3只失败,造影可发现肿瘤血管与肿瘤染色。结论　兔肝血管解剖与人类的相类似,兔VX2 肝癌的DSA、超声表现类似于人类原发性肝癌, 3F微导管可成功地进行肝血管的超选择插管,彩色超声是一种准确、可靠、方便的检测手段。

关键词：兔肝血管肝肿瘤 VX2 介入性放射学超声

CEPC Technical Design Report

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Radiation Detection Technology and Methods 2024年第1期8卷 I0003-I0016,1-1091页

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The Circular Electron Positron Collider(CEPC)is a large scientific project initiated and hosted by China,fostered through extensive collaboration with international *** complex comprises four accelerators:a 30 GeV Linac,a 1.1 GeV Damping Ring,a Booster capable of achieving energies up to 180 GeV,and a Collider operating at varying energy modes(Z,W,H,and tt).The Linac and Damping Ring are situated on the surface,while the subterranean Booster and Collider are housed in a 100 km circumference underground tunnel,strategically accommodating future expansion with provisions for a potential Super Proton Proton Collider(SPPC).The CEPC primarily serves as a Higgs *** its baseline design with synchrotron radiation(SR)power of 30 MW per beam,it can achieve a luminosity of 5×10^(34)cm^(-2)s^(-1)per interaction point(IP),resulting in an integrated luminosity of 13 ab^(-1)for two IPs over a decade,producing 2.6 million Higgs *** the SR power to 50 MW per beam expands the CEPC's capability to generate 4.3 million Higgs bosons,facilitating precise measurements of Higgs coupling at sub-percent levels,exceeding the precision expected from the HL-LHC by an order of *** Technical Design Report(TDR)follows the Preliminary Conceptual Design Report(Pre-CDR,2015)and the Conceptual Design Report(CDR,2018),comprehensively detailing the machine's layout,performance metrics,physical design and analysis,technical systems design,R&D and prototyping efforts,and associated civil engineering ***,it includes a cost estimate and a preliminary construction timeline,establishing a framework for forthcoming engineering design phase and site selection *** is anticipated to begin around 2027-2028,pending government approval,with an estimated duration of 8 *** commencement of experiments and data collection could potentially be initiated in the mid-2030s.

关键词： initiated exceeding precise