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High RF power tests of the first 1.3 GHz fundamental power coupler prototypes for the SHINE project

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Nuclear Science and Techniques 2022年第1期33卷 107-119页

作者： Zhen-yu Ma Shen-Jie zhao Xu-Ming Liu yue-Chao yu Hong-Ru Jiang Xiang Zheng Qiang Chang Zi-Gang Zhang Kai Xu Yan Wang yu-bin zhao Hong-Tao Hou Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201204China

The Shanghai High Repetition Rate XFEL and Extreme Light Facility(SHINE)project will use 6001.3 GHz fundamental power couplers,which are modified based on TTF-Ⅲ power couplers,for continuous-wave operation with input power up to approximately 7 *** first batch of 20 sets of 1.3 GHz coupler prototypes was fabricated from three domestic manufacturers for the SHINE *** better characterize the radio frequency conditioning phenomena for validating the performance of power couplers,a room temperature test stand was designed,constructed,and commissioned for the SHINE 1.3 GHz power *** addition,a horizontal test cryostat was built to test the 1.3 GHz superconducting cavities,fundamental power couplers,tuners,and other components as a *** results of these tests indicate that the 1.3 GHz couplers are capable of handling up to 14 kW continuous ***,the main aspects of the radio frequency design and construction of the test stand,along with the test results of the high-power conditioning of the 1.3 GHz couplers,are described.

关键词： Superconducting accelerating cryomodule 1.3 GHz fundamental power coupler RF conditioning Test bench Horizontal test cryostat

Frequency sensitivity of the passive third harmonic superconducting cavity for SSRF

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Nuclear Science and Techniques 2020年第3期31卷 85-93页

作者： Xiao-yun Pu Hong-Tao Hou Yan Wang Zheng Li Jing Shi yu-bin zhao Jian-Fei Liu Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Key Laboratory of Cryogenics&Superconducting RF Technology Shanghai 201800China Shanghai Advanced Research Institute Chinese Academy of SciencesShanghai 201210China

A 1.5 GHz passive third harmonic superconducting cavity was proposed to improve the beam quality and lifetime in the Shanghai Synchrotron Radiation Facility Phase-II beamline *** improvement highly depends on the resonant frequency of the passive third harmonic superconducting *** is important that the operating frequency of the cavity is within the design range and the cavity has reasonable mechanical stability.A simulation method for the multiphysics coupled analysis has been developed based on the ANSYS *** coupled simulations have been performed under different conditions,such as etching,evacuation,cooling,and *** of mechanical modes and structural stress have been executed.A possible stiffening ring method for the two-cell superconducting niobium cavity has been *** this paper,we present a multiphysics coupled analysis of the third harmonic cavity using a finite element analysis *** results of the analysis show that a reliable frequency for the cavity after electron beam welding is 1498.033 MHz,and the corresponding frequency of the pre-tuning goal is 1496.163 MHz.A naked cavity is a reasonable option based on structural stress and mechanical modal analyses.A frequency range of±500 kHz and limiting tolerable displacement of±0.35 mm are proposed for the design of the frequency tuner.

关键词： Superconducting cavity Passive harmonic cavity Frequency detuning Frequency tuner Multiphysics analysis

Tuning control system of a third harmonic superconducting cavity in the Shanghai Synchrotron Radiation Facility

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Nuclear Science and Techniques 2019年第10期30卷 123-132页

作者： Peng-Peng Gong yu-bin zhao Hong-Tao Hou Zhi-Gang Zhang Xiang Zheng Xiao-yun Pu Kai Xu Qiang Chang Jian-Fei Liu Shanghai Institute of Applied Physics Chinese Academy of SciencesShanghai 201800China University of Chinese Academy of Sciences Beijing 100049China Shanghai Key Laboratory of Cryogenics and Superconducting RF Technology Shanghai 201800China

Beam lifetime is dominated by Touschek scattering at the Shanghai Synchrotron Radiation Facility(SSRF).Touschek loss rate is affected by probability for scattering beyond the RF acceptance and the volume charge density of the *** the phaseⅡupgrade of the SSRF,a third harmonic superconducting cavity will be used to enhance the Touschek lifetime by lengthening the *** Touschek lifetime improvement factor is affected by the voltage of a harmonic *** stabilize the cavity voltage,a tuning control system was designed to control *** design of the tuning control system was based on the SSRF third-generation low-level RF control *** hardware and specialized algorithms were redesigned to fit the harmonic cavity *** design of the tuning control system is complete,and the control system has been *** test result shows that the fluctuation of amplitude is<±0.34%within 1.5 h,which satisfies the stability requirement.

关键词： Passive harmonic cavity Low-level radio frequency Shanghai Synchrotron Radiation Facility Touschek lifetime

A large area ^(3)He tube array detector with vacuum operation capacity for the SANS instrument at the CSNS

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Nuclear Science and Techniques 2022年第7期33卷 83-92页

作者： Xing-Fen Jiang Jian-Rong Zhou Hong Luo Liang Xiao Xiao-Juan Zhou Hong Xu yuan-Guang Xia Xiao-Guang Wu Lin Zhu Wen-Qing Yang Gui-An Yang Bei-Ju Guan Hong-yu Zhang yu-bin zhao Zhi-Jia Sun yuan-Bo Chen State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of SciencesBeijing100049China Spallation Neutron Source Science Center Dongguan523803China University of Chinese Academy of Sciences Beijing100049China

The small-angle neutron scattering(SANS)instrument,one of the first three instruments of the China Spallation Neutron Source(CSNS),is designed to probe the microscopic and mesoscopic structures of materials in the scale range 1–100 nm.A large-area ^(3)He tube array detector has been constructed and operates at the CSNS SANS instrument since August *** consists of 120 linear position-sensitive detector tubes,each 1 m in length and 8 mm in diameter,and filled with ^(3)He gas at 20 bar to obtain a high detection *** ^(3)He tubes were divided into ten modules,providing an overall area of 1000 mm×1020 mm with a high count rate *** each tube is installed independently,the detector can be quickly repaired in situ by replacing damaged *** reduce air scattering,the SANS detector must operate in a vacuum environment(0.1 mbar).An all-metal sealing technique was adopted to avoid high-voltage breakdown by ensuring a high-voltage connection and an electronic system working in an atmospheric environment.A position resolution of 7.8±0.1 mm(full width at maximum)is measured along the length of the tubes,with a high detection efficiency of 81±2% at *** over the past four years,the detector appears to perform well and with a high stability,which supports the SANS instrument to finish approximately 200 user scientific programs.

关键词： Neutron detectors ^(3)He tubes Gaseous detectors Small-angle neutron scattering

Preparation and Characteristics of Chitosan Grafted byγ-methyl L-glutamate

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生物医学工程学杂志 2005年第S1期22卷 83-84页

作者： Fang FENG~△ yu LIU bin-yuan zhao Ke-Ao HU(State Key Laboratory of Metal Matrix Composites, Shanghai Jiaotong University, Shanghai 200030, China)

2.25Cr1MoR容器用钢室温和服役温度下力学性能的测定

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金属热处理 2007年第1期32卷 31-32页

作者：于兆斌史巨元钢铁研究总院北京100081

采用了拉伸、冲击试验对2.25Cr1MoR容器用钢在室温和服役温度下的力学性能进行了研究。结果表明,通过不同处理工艺条件,找出了其强韧性匹配的最佳回火温度为730℃。

关键词： 2.25Cr1MoR容器用钢热处理工艺力学性能

Test of a ^(3)He neutron detector readout electronics prototype for CSNS multipurpose physics neutron diffractometer

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Radiation Detection Technology and Methods 2021年第2期5卷 200-206页

作者： Xiao-guang Wu yu-bin zhao Hong Luo Jian-rong Zhou Liang Xiao Xiao-juan Zhou Bei-ju Guan Xing-cheng Tian Lin Zhu Xing-fen Jiang Zhi-jia Sun State Key Laboratory of Particle Detection and Electronics Institute of High Energy PhysicsChinese Academy of Sciences(CAS)Beijing 100049China University of Chinese Academy of Sciences(UCAS) Beijing 100049China Spallation Neutron Source Science Center Dongguan 523803China

Background Large areas of 3He neutron detector array and corresponding readout electronics are used in the MPI built at China Spallation Neutron Source(CSNS)to measure the position and flight time of scattered neutrons,and MPI has a high requirement for the position resolution of 3He neutron detector.A 3He neutron detector readout electronics prototype composed of two front-end boards and one digital readout board is designed to meet the above *** Testing the whole readout electronics system before its mass production to ensure it can run correctly and fulfill the functional and performance *** The test of the readout electronics prototype is implemented in the laboratory,and a signal generator is used to generate electronic signals instead of actual neutron *** position resolution test of the readout electronics prototype with 3He tubes is carried out in the No.20 beamline measurement room of *** and Conclusion The functional and performance tests in the laboratory state that the readout electronics prototype can fulfill the readout *** typical value of charge resolution is 0.85 fC;the integral nonlinearity of charge is 0.094%in the input charge range from 100 to 800 *** position resolution test result of the prototype with 3He tubes is better than the design requirement of 10 mm and also quite good compared with that of some other commercial *** tests provide a reliable basis for the mass production of the readout electronics prototype.

关键词： CSNS MPI 3He tube Readout electronics prototype Functional and performance tests

921A船板钢的动态断裂韧度K_(ID)研究

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热加工工艺 2006年第14期35卷 28-29页

作者：于兆斌张庄钢铁研究总院分析测试研究所北京100081

采用仪器化冲击试验,分别获得了不同低温状态下921A钢的动态断裂韧度。通过对不同状态下921A钢的动态断裂韧度KID的比较说明:该钢的动态断裂韧度随温度的变化呈现上、下两个平台,存在韧-脆转变特征,且发生低温脆性的温度为-84℃～-60℃... 详细信息

采用仪器化冲击试验,分别获得了不同低温状态下921A钢的动态断裂韧度。通过对不同状态下921A钢的动态断裂韧度KID的比较说明:该钢的动态断裂韧度随温度的变化呈现上、下两个平台,存在韧-脆转变特征,且发生低温脆性的温度为-84℃～-60℃,充分表明该钢具有较好的低温韧度。

关键词： 921A钢动态断裂韧度仪器化冲击试验断口

TRIPLET combined with microwave ablation:A novel treatment for advanced hepatocellular carcinoma

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World Journal of Gastrointestinal Oncology 2025年第1期17卷 10-12页

作者： Fei-yu zhao Guo-Wei Si Nian-Song Qian Department of Thoracic Oncology Respiratory and Critical Care MedicineThe Eighth Medical Center of People’s Liberation Army General HospitalBeijing 100853China Department of Gastroenterology Fourth Medical CentreGeneral Hospital of the People's Liberation ArmyBeijing 100142China Senior Department of Thoracic Oncology Respiratory and Critical Care MedicineThe Eighth Medical Center of People’s Liberation Army General HospitalBeijing 100091China

This editorial comments on a study by Zuo et *** focus is on the efficacy of he-patic arterial infusion chemotherapy combined with camrelizumab and apatinib(the TRIPLET regimen),alongside microwave ablation therapy,in treating advanced hepatocellular carcinoma(HCC).The potential application of this combination therapy for patients with advanced HCC is evaluated.

关键词： Microwave ablation Hepatic arterial infusion chemotherapy Apatinib Camrelizumab Hepatocellular carcinoma