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The design and construction of a pulsed beam generation system based on high intensity cyclotron

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Science China(Physics,Mechanics & Astronomy) 2011年第S2期54卷 210-213页

作者： AN ShiZhong YIN ZhiGuo li pengzhan SONG GuoFang WU LongCheng GUAN FengPing XIE HuaiDong JIA XianLu LU YinLong ZHANG TianJue China Institute of Atomic Energy Beijing 102413China

In order to perform the studies on a pulsed beam generation system based on a high intensity cyclotron, a test beam line with a pulsed beam generation for a 10 MeV compact cyclotron (CYCIAE-10) has been designed and constructed at China Institute of Atomic Energy (CIAE). A 70 MHz continuous H- beam can be pulsed to the pulse length of less than 10 ns with a repetition rate of 4.4 MHz. The sine waveform with a frequency of 2.2 MHz is adopted for the chopper and a mesh structure with single drift and dual gaps is used for the 70 MHz buncher. A helical resonator is designed and constructed based on simulations and experiments on the RF matching for the chopper. A helical inductance loop that is exceptionally large of its kind and equipped with water cooling for the resonator has been successfully wound and a 500 W solid RF amplifier has been manufactured. A special measuring device has been designed, which can be used to measure both the DC beam and the pulsed beam. The required pulsed beam was obtained after pulsed beam tuning.

关键词： beam pulsing chopper buncher RF matching

The design and construction of a pulsed beam generation system based on high intensity cyclotron

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The design and construction of a pulsed beam generation syst...

非铁磁材料表面波电磁超声换能器接收性能分析与优化设计

第一届中国粒子加速器会议

作者： AN ShiZhong YIN ZhiGuo li pengzhan SONG GuoFang WU LongCheng GUAN FengPing XIE HuaiDong JIA XianLu LU YinLong ZHANG TianJue China Institute of Atomic Energy

In order to perform the studies on a pulsed beam generation system based on a high intensity cyclotron,a test beam line with a pulsed beam generation for a 10 MeV compact cyclotron(CYCIAE-10) has been designed and constructed at China Institute of Atomic Energy(CIAE).A 70 MHz continuous H-beam can be pulsed to the pulse length of less than 10 ns with a repetition rate of 4.4 *** sine waveform with a frequency of 2.2 MHz is adopted for the chopper and a mesh structure with single drift and dual gaps is used for the 70 MHz buncher.A helical resonator is designed and constructed based on simulations and experiments on the RF matching for the chopper.A helical inductance loop that is exceptionally large of its kind and equipped with water cooling for the resonator has been successfully wound and a 500 W solid RF amplifier has been manufactured.A special measuring device has been designed,which can be used to measure both the DC beam and the pulsed *** required pulsed beam was obtained after pulsed beam tuning.

关键词： beam pulsing chopper buncher RF matching

来源： cnki会议评论

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cnki会议

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中国电机工程学报 2015年第9期35卷 2360-2365页

作者：王淑娟李智超李鹏展翟国富哈尔滨工业大学电气工程及自动化学院黑龙江省哈尔滨市150001

电磁超声换能器(electromagnetic acoustic transducer,EMAT)接收信号十分微弱,限制了电磁超声无损检测技术的应用。通过对表面波电磁超声换能器进行发射–接收过程多物理场有限元的建模与分析,发现换能器几何参数对其接收性能具有重要... 详细信息

电磁超声换能器(electromagnetic acoustic transducer,EMAT)接收信号十分微弱,限制了电磁超声无损检测技术的应用。通过对表面波电磁超声换能器进行发射–接收过程多物理场有限元的建模与分析,发现换能器几何参数对其接收性能具有重要影响。为此,在所建有限元模型基础上,利用正交试验设计方法提取了影响EMAT接收性能的关键参数并对EMAT几何参数进行了优化设计。优化后电磁超声接收电压峰峰值增长为优化前的1.41倍。设计了一种同向6根导线结构的曲折线圈,又将接收电压提高至优化后的3.83倍,大大提高了EMAT的接收性能。最后,实验验证了模型和优化设计方法的有效性。

关键词：电磁超声换能器多物理场有限元建模优化设计正交试验设计

Additives strategies to improving cycling stability of li metal batteries by modifying electrode electrolyte interphases

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Progress in Natural Science:Materials International 2024年第2期34卷 338-344页

作者： Yuan li Pengfei Huang Chunyu Cui Xiaoyuan Ma li Chen Zekun li linhai li Yuhong Tian School of Biological and Chemical Engineering Guangxi University of Science and Technology School of College of Chemistry and Chemical Engineering Hunan University Isky Future Energy Institute

li metal batteries（LMBs） have attracted much attention due to the ultra-high theoretical capacity of the li metal anode（LMA）.However,the uncontrollable dendrites growth and low coulombic efficiency hinder their practical ***,we explore 3,5-difluoropyridine（2F-BD） as a novel electrolyte additive to enable highperformance *** 2F-BD additive participates in and modifies the solvation structure of li ions by reducing the coordinated number of PF6-at the electrode surface,leading to the formation of a liF and li3N-rich solid electrolyte interphase（SEI）.The liF component increases the robustness of SEI and suppresses the formation of li dendrites,while the li3N component facilitates the transportation and reaction kinetics of li *** a result,the li‖li symmetric cell presents a stable cycling performance of up to 500 h at a current density of 1 mA *** coupling with liFePO4cathode,the obtained full cell achieves high specific capacities of 106.06 mA h g-1and 84.98 mA h g-1at 2.55 mA cm-2and 5.10 mA cm-2,respectively,and maintains a high capacity retention of84.0% after 1000 cycles at 0.13 mA cm-2,with an average cycling CE of 99.58%.

关键词： li metal batteries li dendrites Electrolyte additive

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刑事政策演进视阈下的“破小案”

河北公安警察职业学院学报 2009年第4期9卷 9-14页

作者：李鹏展宁波市公安局海曙分局浙江宁波315010

随着社会治安形势的发展,基本刑事政策由"惩办与宽大相结合"向"宽严相济"演进,随之具体刑事政策亦将由"严打"向"破小案"演进。考量法律的严肃性和执法的公正性,在刑事执法层面,警察机关应树立起"破小案"的工作理念。

关键词：刑事政策演进 “严打” “破小案”

Leaching kinetics of fluorine during the aluminum removal from spent li-ion battery cathode materials

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Journal of Environmental Sciences 2024年第4期138卷 312-325页

作者： Shengjie li Jianxin Zhu Research Center for Eco-Environmental Sciences Chinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

The high content of aluminum(Al)impurity in the recycled cathode powder seriously affects the extraction efficiency of Nickel,Cobalt,Manganese,and lithium resources and the actual commercial value of recycled materials,so Al removal is crucially important to conform to the industrial standard of spent li-ion battery cathode *** this work,we systematically investigated the leaching process and optimum conditions associated with Al removal from the cathode powder materials collected in a wet cathode-powder peeling and recycling production line of spent li-ion batteries(liBs).Moreover,we specifically studied the leaching of fluorine(F)synergistically happened along with the removal process of Al,which was not concerned about in other studies,but one of the key factors affecting pollution prevention in the recovery *** mechanism of the whole process including the leaching of Al and F from the cathode powder was indicated by using NMR,FTIR,and XPS,and a defluoridation process was preliminarily investigated in this *** leaching kinetics of Al could be successfully described by the shrinking core model,controlled by the diffusion process and the activation energy was 11.14 kJ/***,the leaching of F was attributed to the dissolution of liPF6and decomposition of PVDF,and the kinetics associated was described by Avrami *** interaction of Al and F is advantageous to realize the defluoridation to some *** is expected that our investigation will provide theoretical support for the large-scale recycling of spent liBs.

关键词： Al removal F leaching Cathode powder Heating alkali leaching Leaching kinetics

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刑事政策演进视阈下的“破小案”

犯罪研究 2009年第6期 31-38,69页

作者：李鹏展浙江省宁波市公安局海曙分局

关键词：刑事政策演进 “严打” “破小案”

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刑事政策:“严打”与“破小案”

公安理论与实践（上海公安高等专科学校学报） 2010年第4期20卷 45-47,52页

作者：李鹏展浙江省宁波市公安局浙江宁波315010

随着社会治安形势的发展,基本刑事政策由"惩办与宽大相结合"向"宽严相济"演进,随之具体刑事政策亦将由"严打"向"破小案"演进。

关键词：刑事政策演进严打破小案

SEI/dead li-turning capacity loss for high-performance anode-free solid-state lithium batteries

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Journal of Energy Chemistry 2024年第9期96卷 145-152页

作者： Qianwen Yin Tianyu li Hongzhang Zhang Guiming Zhong Xiaofei Yang Xianfeng li Division of Energy Storage Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China Key Laboratory of Long-Duration and Large-Scale Energy Storage Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina Laboratory of Advanced Spectro-Electrochemistry and lithium-Ion Batteries Dalian National Laboratory for Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina

Anode-free solid-state lithium metal batteries(AF-SSLBs)have the potential to deliver higher energy density and improved safety beyond lithium-metal ***,the unclear mechanism for the fast capacity decay in AF-SSLBs,either determined by dead li or solid electrolyte interface(SEI),limits the proposal of effective strategies to prolong cycling *** clarify the underlying mechanism,herein,the evolution of SEI and dead li is quantitatively analyzed by a solid-state nuclear magnetic resonance(ss-NMR)technology in a typical liPF6-based polymer *** results show that the initial capacity loss is attributed to the formation of SEI,while the dead li dominates the following capacity loss and the growth rate is 0.141 mA h cm^(−2)cycle−*** reduce the active li loss,the combination of inorganic-rich SEI and self-healing electrostatic shield effect is proposed to improve the reversibility of li deposition/dissolution behavior,which reduces the capacity loss rate for the initial SEI and following dead li generation by 2.3 and 20.1 folds,*** a result,the initial Coulombic efficiency(ICE)and stable CE increase by 15.1%and 15.3%in li-Cu cells,which guides the rational design of high-performance AF-SSLBs.

关键词： Solid-state lithium batteries Solid-state NMR Anode-free SEI Dead li