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Study of a 560-mm-long stripline kicker for HIT 10 MeV electron accelerator

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Radiation Detection Technology and Methods 2021年第3期5卷 373-378页

作者： Jianbin Zhu Hua Shi Bowen Bai Shu Zhang Zhandong Zhang Bin Chen yunlong chi Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China University of chinese Academy of Sciences Beijing 100049China

Purpose A stripline kicker is required for Harbin Institute of Technology(HIT)10 MeV electron accelerator to scan electrons horizontally in two directions,and the maximum deflecting angle is 65 *** this study,a 560-mm-long stripline kicker was designed to achieve good field uniformity and odd mode impedance *** In order to reduce power reflections and meet field uniformity requirement,we optimized the cross section of the kicker main *** and optimization of the stripline kicker were finished by *** The field uniformity is 2%in the 60 mm(x)×80 mm(y)region,as *** impedance matching and manufacturing,the transmission odd mode impedance was finally chosen to 45Ω,which indicated a reflecting loss of less than−50 dB below 1 *** maximum field is less than 7 MV/m with a maximum pulse voltage of±22 kV between the two electrodes when the electrons pass through the *** The physical design of the stripline kicker has been finished,and the simulation results satisfied the requirements.

关键词： Linac Stripline kicker Field uniformity

Operation of the CSNS Penning surface H^- ion source

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Science china(Physics,Mechanics & Astronomy) 2011年第S2期54卷 245-248页

作者： WU XiaoBing OUYANG HuaFu chi yunlong HE Wei HUANG Tao LI Gang LIU YingMan LU YanHua XU TaoGuang ZHANG JunSong ZHANG HuaShun ZHAO FuXiang Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China Graduate University of chinese Academy of Sciences Beijing 100049China

The accelerator complex of the china Spallation Neutron Source (CSNS) consists of a H- linear accelerator (linac) and a rapid cycling synchrotron (RCS). The linac contains a Penning surface H- ion source. The designed energy and the beam current of the source are 50 keV and 20 mA respectively, with a normalized root mean square (norm. rms.) emittance of 0.2π mm mrad. The manufactures and tests of the discharge chamber are in great progress. The construction of H- ion source test stand has been completed, and the operation of the source is also in progress. Stable H- ion beams with energy of 50 keV and current up to 50 mA are attained. Emittance measurement for the H- beam is being prepared.

关键词： CSNS Penning H- ion source discharge chamber current emittance

Design and development of radio frequency output window for circular electron–positron collider klystron

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chinese Physics B 2018年第11期27卷 620-625页

作者： Zhijun Lu Shigeki Fukuda Zusheng Zhou Shilun Pei Shengchang Wang Ouzheng Xiao UnNisa Zaib Bowen Bai Guoxi Pei Dong Dong Ningchuang Zhou Shaozhe Wang yunlong chi Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China University of chinese Academy of Sciences Beijing 100049 China Key Laboratory of Particle Acceleration Physics and Technology Institute of High Energy Physics Chinese Academy of Sciences Beijing 100049 China High Energy Accelerator Research Organization KEK Oho Ibaraki 305-0801 Japan GLVAC Industrial Technology Research Institute of High Power Devices Kunshan 215300 China

This paper presents the first phase of design, analysis, and simulation for the klystron coaxial radio frequency（RF）output window. This study is motivated by 800 kW continuous wave（CW）, 650 MHz klystrons for the future plan of circular electron–positron collider（CEPC） project. The RF window which is used in the klystron output section has a function to separate the klystron from the inner vacuum side to the outside, and high RF power propagates through the window with small power dissipation. Therefore, the window is a key component for the high power klystron. However, it is vulnerable to the high thermal stress and multipacting, so this paper presents the window design and analysis for these problems. The microwave design has been performed by using the computer simulation technology（CST） microwave studio and the return loss of the window has been established to be less than-90 d B. The multipacting simulation of the window has been carried out using MultiPac and CST particles studio. Through the multipacting analysis, it is shown that with thin coating of TiN, the multipacting effect has been suppressed effectively on the ceramic surface. The thermal analysis is carried out using ANSYS code and the temperature of alumina ceramic is lower than 310 K with water *** design result successfully meets the requirement of the CEPC 650 MHz klystron. The manufacturing and high power test plan are also described in this paper.

关键词： klystron coaxial radio frequency window thermal stress multipacting

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Marx调制器单元设计和叠加测试

强激光与粒子束 2011年第10期23卷 2737-2741页

作者：吕琨何大勇池云龙中国科学院高能物理研究所北京100049 中国科学院研究生院北京100049

基于单元器件的成功研制,介绍了Marx调制器单元充放电回路、电压和电流的实时监测以及控制系统和连锁保护等功能的设计和实现。对IGBT固态开关的静态、动态均压进行分析和模拟,采用RCD缓冲电路实现IGBT的动态均压;对控制系统改进和优化... 详细信息

基于单元器件的成功研制,介绍了Marx调制器单元充放电回路、电压和电流的实时监测以及控制系统和连锁保护等功能的设计和实现。对IGBT固态开关的静态、动态均压进行分析和模拟,采用RCD缓冲电路实现IGBT的动态均压;对控制系统改进和优化,设计了专用电源转换模块;分压电路和电流霍尔采样回路分别实现调制器单元电压和电流的检测;连锁保护功能由控制系统和继电器控制完成。所有部件按照电气标准设计在调制器单元支架上。经过测试的4个单元进行了叠加试验,4个单元总输出24kV,各器件在高压试验中工作正常。

关键词： Marx固态调制器绝缘栅双极晶体管 RCD缓冲单元布局四单元叠加试验

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Marx固态调制器单元研制

强激光与粒子束 2010年第7期22卷 1610-1614页

作者：吕琨何大勇池云龙中国科学院高能物理研究所北京100049 中国科学院研究生院北京100049

Marx固态脉冲调制器是根据Marx发生器的原理并以绝缘栅双极晶体管(IGBT)固态开关作为开关元件而设计的脉冲调制器。其低成本、高可靠性、小体积等优点可以很好地满足国际直线对撞机(ILC)对脉冲调制器提出的要求。介绍了Marx调制器单元... 详细信息

Marx固态脉冲调制器是根据Marx发生器的原理并以绝缘栅双极晶体管(IGBT)固态开关作为开关元件而设计的脉冲调制器。其低成本、高可靠性、小体积等优点可以很好地满足国际直线对撞机(ILC)对脉冲调制器提出的要求。介绍了Marx调制器单元样机主要部件包括IGBT串联高压开关组件、储能电容器、串联高压充电电源以及控制系统样机的研制。Marx调制器单元完成了12 kV高压试验,各部件达到设计指标,为单元的模块化生产和多单元的叠加试验提供可靠的数据和保障。

关键词：国际直线对撞机 Marx发生器固态调制器绝缘栅双极晶体管

Status of the IHEP 1.3 GHz superconducting RF program

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Science china(Physics,Mechanics & Astronomy) 2011年第S2期54卷 154-159页

作者： GAO Jie ZHAI JiYuan PAN WeiMing LI ShaoPeng SUN Yi DAI JianPing chi yunlong LI ZhongQuan ZHAO TongXian HUANG TongMing MA Qiang GE Rui LI ChunHua GUO HaiSheng WANG GuangWei QIU Feng LIN HaiYing HOU Mi WANG QunYao Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

The 1.3 GHz superconducting radio-frequency (SRF) technology is one of the key technologies for the ILC and future XFEL and ERL projects in china. With the aim to develop 1.3 GHz SRF technology, IHEP has started a program to build an SRF Accelerating Unit. This unit contains a 9-cell 1.3 GHz superconducting cavity, a short cryomodule, a high power input coupler, a tuner and a low level RF system. This program also includes the SRF laboratory upgrade, which will permit the unit to be built and tested at IHEP. The unit will be used for the 1.3 GHz SRF system integration study, high power horizontal test and possible beam test in the future. In this paper, we report the recent R&D status of this program. The first large grain low-loss shape 9-cell superconducting RF cavity made by IHEP reached 20 MV/m in the first vertical test in July, 2010. The prototype tuner and low level RF (LLRF) system are under test. The high power input coupler and cryomodule are under fabrication. Several key SRF facilities for 9-cell cavity surface treatment and pre-tuning were successfully commissioned and are in operation.

关键词： 1.3 GHz superconducting RF 9-cell cavity high power input coupler tuner LLRF cryomodule

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ADS注入器Ⅰ高频四极场功率源系统研制

强激光与粒子束 2015年第8期27卷 256-260页

作者：周祖圣何大勇刘熔池云龙中国科学院高能物理研究所、粒子加速物理与技术重点实验室北京100049

ADS注入器Ⅰ高频四极场(RFQ)功率源系统将为325MHz RFQ提供连续波功率,使束流离开RFQ时,其能量达到几MeV。功率源系统除了补偿RFQ腔耗外,还必须提供足够的功率以保证RFQ中的加速电场。ADS注入器ⅠRFQ功率源系统主要包括600kW连续波速调... 详细信息

ADS注入器Ⅰ高频四极场(RFQ)功率源系统将为325MHz RFQ提供连续波功率,使束流离开RFQ时,其能量达到几MeV。功率源系统除了补偿RFQ腔耗外,还必须提供足够的功率以保证RFQ中的加速电场。ADS注入器ⅠRFQ功率源系统主要包括600kW连续波速调管、80kV/18A基于脉冲步进调制技术的PSM电源、环流器以及相应的波导传输系统等。根据ADS总体指标和RFQ的相关技术参数,提出了功率源的总体布局、技术指标以及设计要求等,在此基础上完成系统安装与调试,并通过专家组测试与验收。

关键词： ADS 注入器 RFQ功率源

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中国散裂中子源大功率可编程脉冲电源设计

强激光与粒子束 2010年第11期22卷 2689-2694页

作者：沈莉黄川池云龙唐靖宇周国仲中国科学院高能物理研究所北京100049

在中国散裂中子源大功率可编程脉冲电源设计中,主回路采用绝缘栅双极型晶体管(IGBT)H桥串并联拓扑,错相工作方式,利用IGBT功率放大的特性,实现了电源高功率(60 MW)、高频率(1.843 2MHz)、高压(3.319 kV)和大电流(18 kA)的要求,并通过电... 详细信息

在中国散裂中子源大功率可编程脉冲电源设计中,主回路采用绝缘栅双极型晶体管(IGBT)H桥串并联拓扑,错相工作方式,利用IGBT功率放大的特性,实现了电源高功率(60 MW)、高频率(1.843 2MHz)、高压(3.319 kV)和大电流(18 kA)的要求,并通过电源反馈控制系统,实现了电源的快速响应时间,使电源跟踪精度达到1.5%,满足指标要求。在电源研制中,解决了IGBT高压、大电流的均压和均流问题;由于IGBT工作在开关状态,为了消除谐波,利用多重化技术,得到了光滑的输出脉冲电流曲线;采用电流互感器的并联,实现了输出大电流的检测;电源的反馈控制策略采用比例和前馈运算,实现了电源输出波形对给定波形的快速跟踪。

关键词：快速跟踪谐波 IGBTH桥错相工作多重化处理

S波段HYBRID聚束-加速结构的样机研制

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强激光与粒子束 2021年第2期33卷 89-95页

作者：高斌裴士伦王辉赵世琦池云龙清华大学工程物理系北京100084 中国原子能科学研究院回旋加速器研究设计中心北京102413 中国科学院高能物理研究所北京100049

Hybrid聚束-加速结构是把驻波预聚束器、行波聚束器和标准加速管集成到一起的新型RF结构。简述了对S波段Hybrid聚束-加速结构样机的束流动力学优化和微波设计结果,解释了Hybrid结构导致发射度增长的原因,对此样机进行了射频低功率测试... 详细信息

Hybrid聚束-加速结构是把驻波预聚束器、行波聚束器和标准加速管集成到一起的新型RF结构。简述了对S波段Hybrid聚束-加速结构样机的束流动力学优化和微波设计结果,解释了Hybrid结构导致发射度增长的原因,对此样机进行了射频低功率测试。样机的冷测结果与RF设计结果一致性很好。在冷测频率2855.21 MHz处,实测S11小于-45 dB,腔间相移偏差小于±2°,VSWR≤1.2对应的带宽大于5 MHz,轴向场分布完全满足动力学要求。

关键词：聚束系统 Hybrid聚束-加速结构非谐振微扰法反射相位法低功率测试