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Analysis and simulation of the tune ripple effect on beam spill ripple in RF-KO slow extraction

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Nuclear Science and Techniques 2022年第5期33卷 91-101页

作者： Wen-Bo Ye Hong-Juan Yao Shu-Xin Zheng xia-ling guan Xue-Wu Wang Key Laboratory of Particle and Radiation Imaging(Tsinghua University) Ministry of EducationBeijing 100084China Laboratory for Advanced Radiation Sources and Application Tsinghua UniversityBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China

Tune ripple has a significant influence on beam spill ripple in RF-knockout(RF-KO)slow *** this study,a model was proposed to explain how the tune ripple affects the beam spill in RF-KO slow extraction;consequently,a simulation was performed using the lattice of the Xi’an Proton Application Facility(XiPAF)synchrotron to verify the *** simulation demonstrates that the tune ripple influences the beam spill in two *** the one hand,the tune ripple causes a direct fluctuation in the separatrix area,which induces beam spill *** the other hand,the tune ripple influences the emittance growth rate in RF-knockout slow *** two aspects simultaneously contribute to the beam spill ripple.

关键词： RF-knockout slow extraction Synchrotron Tune ripple Power supply ripple Beam spillripple

Beam position monitors as precise phase pickups for beam energy measurement at the Compact Pulsed Hadron Source

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Nuclear Science and Techniques 2019年第2期30卷 1-9页

作者： Min-Wen Wang Qing-Zi Xing Shu-Xin Zheng Zhong-Ming Wang Meng-Tong Qiu xia-ling guan Xue-Wu Wang Wen-Hui Huang Laboratory of Particle and Radiation Imaging Ministry of EducationTsinghua University Laboratory for Advanced Radiation Sources and Application Tsinghua University Department of Engineering Physics Tsinghua University State Key Laboratory of Intense Pulsed Radiation Simulation and Effect Northwest Institute of Nuclear Technology

The 13-MeV proton linac of the Compact Pulsed Hadron Source(CPHS) at Tsinghua University, China,is composed of a 50-keV electron cyclotron resonance proton source, a 3-MeV four-vane-type radio-frequency quadrupole(RFQ) accelerator, and a drift tube linac(DTL). Precise measurement of the beam energies at the exit of the RFQ and the DTL is critical for DTL commissioning. Two button-type beam position monitors(BPMs) installed downstream of the RFQ are used to perform the measurement using a time-of-flight method. The effects of several factors on phase measurement accuracy are analyzed. The phase measurement accuracy of the BPMs at CPHS is better than ± 1.03° at 325 MHz after corrections,corresponding to an energy measurement error of± 0.07%. The beam energy measured at the exit of the RFQ is 2.994 ± 0.0022 MeV,which is consistent with the design value.

关键词： Beam energy Time of flight Beam position monitor Phase pickup

Design and test of an RF acceleration system loaded with magnetic alloy for the proton synchrotron of the Xi'an Proton Application Facility

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Nuclear Science and Techniques 2018年第7期29卷 116-123页

作者： guang-Rui Li Shu-Xin Zheng Hong-Jin Zeng Zhi-Yu Wang Cai-Jun Yu Gang Fu Hong-Juan Yao xia-ling guan Xue-Wu Wang Wen-Hui Huang Laboratory of Particle&Radiation Imaging Tsinghua UniversityMinistry of EducationBeijing 100084China Laboratory for Advanced Radiation Sources and Application Tsinghua UniversityBeijing 100084China Department of Engineering Physics Tsinghua UniversityBeijing 100084China Beijing Institute of Radio Measurement Beijing 100084China

The Xi'an Proton Application Facility(XiPAF)is a facility dedicated to the experimental simulation of the space radiation *** facility uses a compact synchrotron as its final-stage *** synchrotron can accelerate a proton beam from 7 to 230 *** design results show that the radio frequency(RF) acceleration system should work in the frequency range of 1—6 MHz and provide a maximum voltage of >800 *** dilute the strong space charge effect during the injection period,we also aim to achieve multiharmonic acceleration.A compact RF acceleration system loaded with magnetic alloy cores has been designed and developed to fulfill these *** preliminary test results show that the system can work normally with a gap voltage of 800 *** a further RF power upgrade,the voltage can be improved to >1:2 kV.

关键词：质子同步加速器加速系统物理设计设备 RF 装载合金磁性

Elective single blastocyst transfer is more suitable for normal responders than for high responders

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Chinese Medical Journal 2013年第11期126卷 2125-2128页

作者： WU Ke-liang ZHAO Hai-bin LIU Hui ZHONG Wan-xia YU guan-ling CHEN Zi-jiang Center for Reproductive Medicine Provincial Hospital Affiliated to Shandong University National Research Center for Assisted Reproductive Technology and Reproductive Genetics China Key laboratory for Reproductive Endocrinology of Ministry of Education Shandong Provincial Key Laboratory of Reproductive Medicine Jinan Shandong 250021 China

Background Embryo quality and receptivity of the endometrium are two factors that determine the results of in vitro fertilization/intra-cytoplasmic sperm injection-embryo transfer （IVF/ICSI-ET）. There is no consensus of the optimal transfer strategy for normal responders or high responders. The current study aimed to find the optimal transfer strategy for different subgroups of patients. Methods From April 2010 to December 2010, patients who meet the following criteria were included in this study; primary infertility, female age 〈35 years, FSH level on female cycle day 2-3 〈12 mlU/ml, at least six good quality embryos available on day *** clinical outcomes using different transfer strategies between normal responders and high responders were reviewed and compared. Results For the normal responders, the clinical pregnancy rate of day three double-embryo transfer （DET） was comparable to that of day five elective single blastocyst transfer （eSBT）, 64.04% vs. 60.33% （P〉0.05）. For the high responders, the clinical pregnancy rate of day five eSBT was significantly lower than that of day three DET, 43.35% vs. 57.21% （P〈0.05）. For the high responders, the rates of clinical pregnancy and implantation in frozen-thawed embryo transfer （FET） cycles were notably higher than in eSBT cycles （64.56% vs. 43.35% and 62.11% vs. 43.35% respectively）（P〈0.05）. Conclusions For normal responders, eSBT might be an applicabte strategy to reduce multiple pregnancy rates while maintaining acceptable overall pregnancy rates. And in order to reduce multiple pregnancies and increase the chance of pregnancy of high responders, FET may be a preferable strategy.

关键词： embryo transfer elective single blastocyst transfer high responder normal responder

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6种常用SPF级大小鼠繁殖性能测定与分析

中国比较医学杂志 2016年第10期26卷 9-13页

作者：孙侠刘科杨林夏冠玲谭巧燕王刚广东省医学实验动物中心佛山528248

目的测定、分析本中心保存的6种常用SPF级大小鼠(SD大鼠、C57BL/6小鼠、BALB/c小鼠、NIH小鼠、KM小鼠、ICR小鼠)的主要繁殖性状。方法近交系小鼠采用全同胞同居交配,封闭群大鼠和小鼠采用循环交配。测定这6种品系大小鼠第1~4胎所生仔鼠... 详细信息

目的测定、分析本中心保存的6种常用SPF级大小鼠(SD大鼠、C57BL/6小鼠、BALB/c小鼠、NIH小鼠、KM小鼠、ICR小鼠)的主要繁殖性状。方法近交系小鼠采用全同胞同居交配,封闭群大鼠和小鼠采用循环交配。测定这6种品系大小鼠第1~4胎所生仔鼠的平均产仔数、平均带仔数和平均离乳数,并计算离乳率。同时测定初配日龄、初产日龄、初产间隔和各胎胎间隔。结果近交系小鼠的平均产仔数均为6~7只,前3胎繁殖数据基本保持稳定,第4胎各项数据相比第3胎明显下降(P<0.05)。BALB/c小鼠的离乳率在98%~99%,C57BL/6小鼠为96%~98%。封闭群实验动物的平均产仔数可达12~14只,第2~3胎平均产仔数均较第1胎明显升高(P<0.05),但第4胎又比第3胎显著下降(P<0.05)。NIH、KM和ICR小鼠的离乳率都维持在98%~99%;SD大鼠的离乳率则略低(95%~97%)。小鼠的初配日龄在70 d^80 d之间,大鼠在109 d;封闭群小鼠的初产日龄和初产间隔低于近交系小鼠,大鼠的初产日龄和初产间隔分别为136.3 d和27.7 d;近交系小鼠的胎间隔在34 d^40 d之间,封闭群小鼠在25.5 d^28.7 d之间,大鼠在32.8 d^33.8 d之间。结论本中心保存的6种常用大小鼠繁殖性能较高,获得的繁殖性能参数为华南地区实验大小鼠商业化生产和啮齿类实验动物资源库的建立提供依据和基础数据。

关键词：大鼠小鼠繁殖性能测定统计分析

Effect of Zusanli(ST 36) moxibustion on rat mesenteric microvascular system

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Journal of Traditional Chinese Medicine 2014年第4期34卷 491-497页

作者： Hongqing xia ling guan Yiling Yang Department of Acupuncture and Moxibustion the General Hospital of Chinese People's Liberation Army

OBJECTIVE: To investigate the effect of moxibustion on Zusanli(ST 36) on visceral-mesenteric ***: Forty-five SD rats were randomly assigned to a moxibustion, electroacupuncture(EA),and blank group. In the moxibustion group, heat stimulation of moxibustion to the Zusanli(ST36)area of normal rats was performed for 15 min. In the EA group, needles were inserted into the Zusanli(ST36)and later alpoint[0.5 cm lateral from Zusanli(ST 36)] for 15 min. The blank group was not given any treatment. We continuously monitored mesenteric microvascular changes with invivo ***:Moxibustion and EA to Zusanli(ST 36) increase the diameter of mesenteric arterioles and venules(P<0.05). There were no obvious changes in the blank group. Fine arterial diameter peaked at12 min in the moxibustion group, while it peaked at15 min in the EA ***:The stimulation of moxibustion and acupuncture to Zusanli(ST 36) has immediate effects on expanding the microvasculature. This dilation may be the mechanism of the gastrointestinal effect of Zusanli(ST36).

关键词： Moxibustion Electroacupuncture Zusanli(ST 36) Splanchnic circulation

A cellulose-based lithium-ion battery separator with regulated ionic transport and high thermal stability for extreme environments

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Nano Research 2025年第1期18卷 315-322页

作者： Kun-Peng Yang Song Xie Zi-Meng Han Hao-Cheng Liu Chong-Han Yin Wen-Bin Sun Zhang-Chi ling Huai-Bin Yang De-Han Li Qing-Fang guan Shu-Hong Yu Department of Chemistry New Cornerstone Science LaboratoryInstitute of Biomimetic Materials&ChemistryAnhui Engineering Laboratory of Biomimetic MaterialsDivision of Nanomaterials&ChemistryHefei National Research Center for Physical Sciences at the MicroscaleUniversity of Science and Technology of ChinaHefei 230026China Institute of Innovative Materials Department of Materials Science and EngineeringDepartment of ChemistrySouthern University of Science and TechnologyShenzhen 518055China

Separators play a critical role in lithium-ion ***,the restrictions of thermal stability and inferior electrical performance in commercial polyolefin separators significantly limit their applications under harsh ***,we report a cellulose-assisted self-assembly strategy to construct a cellulose-based separator massively and *** an ultrahigh ionic conductivity in electrolytes of 3.7 mS·cm^(-1) and the ability to regulate ion transport,the obtained separator is a promising alternative for high-performance lithium-ion *** addition,integrated with high thermal stability,the cellulose-based separator endows batteries with high safety at high temperatures,greatly expanding the application scenarios of energy storage devices in extreme environments.

关键词： lithium-ion batteries bio-inspired materials battery separators cellulose nanofiber ultrahigh ionic conductivity high safety

Characteristic Mode Analysis for Thin Dielectric Sheets with Alternative Surface Integral Equation

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Chinese Journal of Electronics 2022年第6期31卷 1181-1188页

作者： JIA Chunlai HE Zi DING Dazhi guan ling AI xia LIU Jiaqi CHEN Xuewen Department of Communication Engineering Nanjing University of Science and Technology Science and Technology on Electromagnetic Scattering Laboratory Beijing Institute of Environmental Features National Key Laboratory of Science and Technology on Test Physics and Numerical Mathematics School of Physics and Wuhan National Laboratory for Optoelectronics Huazhong University of Science and Technology

When the dielectric sheet is electrically thin in the normal direction, the conventional volume integral equation(VIE) can be approximately simplified to the surface one. On this basis, a novel surface integral equation-based formulation is presented for analyzing characteristic mode(CM) of thin dielectric sheets. The resultant CMs are expressed with tangential and normal components of electric volume currents, which are more intuitive than the conventional VIE-based one. Due to the application of volume equivalence principle, the proposed formulation is immune to non-physical modes. The CMs of typical thin dielectric bodies, including the dielectric substrate and radome, are analyzed to show that the proposed formulation is computationally efficient with encouraging accuracy.

关键词： normal components alternative surface integral equation thin dielectric sheets normal direction electric volume currents dielectric sheet radome radomes dielectric bodies surface integral equation-based formulation volume equivalence principle thin dielectric bodies tangential components nonphysical modes electromagnetic wave scattering conventional volume integral equation integral equations characteristic mode analysis dielectric substrate

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SPF级大鼠和小鼠保种设施的建立与运行

实验动物科学 2014年第4期31卷 49-53页

作者：刘科夏冠玲谭巧燕杨林王刚唐小江广东省医学实验动物中心佛山528248

大鼠和小鼠保种繁育是其扩大生产和推广应用的先决条件。保种繁育控制直接影响动物的遗传性状和质量,影响扩大生产群产量。我中心2012年建成大鼠和小鼠屏障配套隔离包保种设施,并保存有大鼠和小鼠7个品系。设施运行至今,保种动物质量较... 详细信息

大鼠和小鼠保种繁育是其扩大生产和推广应用的先决条件。保种繁育控制直接影响动物的遗传性状和质量,影响扩大生产群产量。我中心2012年建成大鼠和小鼠屏障配套隔离包保种设施,并保存有大鼠和小鼠7个品系。设施运行至今,保种动物质量较高,均符合SPF级动物标准。本文通过介绍我中心SPF级大鼠和小鼠保种设施的建立,设施运行、操作和设施评定及经验体会,以及保种动物品系、质量要求,为大鼠和小鼠的保种及繁育工作提供参考。

关键词：大鼠和小鼠保种设施建立运行