X波段高功率负载的优化设计与测试

李秦; 柴熙源; 唐运盖; 王改; 吴丛凤

doi:10.11884/HPLPB202234.210451

X波段高功率负载的优化设计与测试

doi: 10.11884/HPLPB202234.210451

中国科学技术大学国家同步辐射实验室，合肥 230026

基金项目: 国家重点研发计划项目(2016YFA0401900)；中央高校基本科研业务费专项资金(WK2310000098)

详细信息

作者简介:
李　秦，lq123123@mail.ustc.edu.cn

通讯作者:
吴丛凤，cfwu@ustc.edu.cn

中图分类号: TN61
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- 文章访问数: 864
- HTML全文浏览量: 332
- PDF下载量: 72
- 被引次数: 0
出版历程
- 收稿日期: 2021-10-25
- 修回日期: 2021-12-13
- 录用日期: 2021-12-23
- 网络出版日期: 2021-12-29
- 刊出日期: 2022-03-19

Design and test of X-band high power loads

National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230026, China

摘要

摘要: 利用三维电磁场仿真软件CST进行了圆形水室水负载的仿真设计，先后设计的两种不同规格的负载驻波比分别为1.032 5和1.055 3，在50 MW的峰值功率下，峰值场强分别为21.16 MV/m和17.57 MV/m；并探究了陶瓷片和水的介电性质对驻波比的影响；测试驻波比分别为1.058 2和1.076 3。对一种圆筒水负载进行了优化设计，结果表明其具有很高的功率耐受水平。最后设计了一种不锈钢干负载，对其吸收齿结构和长度进行了优化，使其更利于加工。使用ANSYS对干负载结构进行了热应力分析，结果显示，最高温度和最大应力分别为83.478 ℃和63.917 MPa，最大形变为0.072 971 mm。
- X波段 /
- 驻波比 /
- 高功率 /
- 吸收负载 /
- 热应力分析
Abstract: In the research project of high performance free electron laser, it is necessary to absorb the residual power at the end of its acceleration structure. At the operating frequency of 11.424 GHz, the RF load with the VSWR (voltage standing wave ratio) of less than 1.1 and high power absorption capacity needs to be developed. The software CST (Computer Simulation Technology) is used to design the loads. For the cylindrical water chamber water load, the design VSWRs are 1.0325 and 1.0533; At 50 MW peak power, the peak field intensities are 21.16 MV/m and 17.57 MV/m; the test VSWRs are 1.0582 and 1.0763. The effect of dielectric properties of ceramic and water on VSWR is also investigated. For the cylinder-shaped water load, the simulation results show that it has a high power tolerance level. For the dry load, the length of the load and the structure of the absorbing tooth are optimized to make it more convenient for machining. The results of thermal stress analysis calculated by ANSYS show that the maximum temperature and stress are 83.478 ℃ and 63.917 MPa respectively, and the maximum deformation is 0.072 971 mm.
- X-band /
- voltage standing wave ratio /
- high power /
- load /
- thermal stress analysis

HTML全文

图 1 CST内水负载模型

Figure 1. Water load in CST

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图 2 水负载驻波比

Figure 2. VSWR of water load by CST

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图 3 水负载电场分布

Figure 3. Electric field of water load in CST

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图 4 水负载实物图

Figure 4. Water load

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图 5 陶瓷片的介电常数对驻波比影响

Figure 5. Effect of relative dielectric constant of ceramic on VSWR

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图 6 陶瓷片的损耗正切对驻波比影响

Figure 6. Effect of loss tangent of ceramic on VSWR

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图 7 水的介电常数对驻波比的影响

Figure 7. Effect of relative dielectric constant of water on VSWR

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图 8 水的损耗正切对驻波比的影响

Figure 8. Effect of loss tangent of water on VSWR

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图 9 CST内新水负载模型

Figure 9. New water load in CST

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图 10 新水负载驻波比

Figure 10. VSWR of new water load by CST

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图 11 新水负载电场分布

Figure 11. Electric field of water load in CST

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图 12 新水负载实物图

Figure 12. New water load

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图 13 水负载测量结果 (VSWR=1.0582)

Figure 13. Water load measurement result (VSWR=1.0582)

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图 14 新水负载测量结果 (VSWR=1.0763)

Figure 14. New water load measurement result (VSWR=1.0763)

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图 15 CST内圆筒水负载模型

Figure 15. Cylinder-shaped water load in CST

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图 16 圆筒水负载驻波比

Figure 16. VSWR of cylinder-shaped water load by CST

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图 17 圆筒水负载电场分布

Figure 17. Electric field of cylinder-shaped water load in CST

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图 18 CST内干负载模型

Figure 18. Dry load in CST

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图 19 正对 (a)和错开结构(b)

Figure 19. Aligned (a) and staggered structure (b)

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图 20 电场分布(正对结构)

Figure 20. Electric field in CST (aligned structure)

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图 21 电场分布(错开结构)

Figure 21. Electric field in CST (staggered structure)

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图 22 负载驻波比

Figure 22. VSWR of dry load by CST

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图 23 温度分布(正对结构)

Figure 23. Temperature distribution (aligned structure)

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图 24 温度分布(错开结构)

Figure 24. Temperature distribution (staggered structure)

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图 25 应力分布(正对结构)

Figure 25. Stress distribution (aligned structure)

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图 26 应力分布(错开结构)

Figure 26. Stress distribution (staggered structure)

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图 27 形变分布(正对结构)

Figure 27. Deformation distribution (aligned structure)

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图 28 形变分布(错开结构

Figure 28. Deformation distribution (staggered structure)

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图 29 耦合段长度对驻波比影响

Figure 29. Effect of coupling length on VSWR

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图 30 吸收齿半径对驻波比影响

Figure 30. Effect of absorption tooth radius on VSWR

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图 31 新干负载结构

Figure 31. Structure of the new dry load

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图 32 新干负载电场分布

Figure 32. Electric field in CST of the new dry load

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图 33 新干负载驻波比

Figure 33. VSWR of the new dry load by CST

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图 34 新干负载温度分布

Figure 34. Temperature distribution of the new dry load

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图 35 新干负载应力分布

Figure 35. Stress distribution of the new dry load

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图 36 新干负载形变分布

Figure 36. Deformation distribution of the new dry load

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表 1 负载设计要求

Table 1. Load design requirements

frequency/ GHz	VSWR	average absorbed power/kW	peak absorbed power/MW
11.424	<1.1	3	50

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表 2 10 GHz下水的介电性质

Table 2. Dielectric properties of water at 10 GHz

temperature/℃	relative dielectric constant	loss tangent
15	49	0.7
25	55	0.54
35	58	0.44
45	59	0.4
55	60	0.36
65	59	0.32
75	57	0.28

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参考文献(13)

[1]	赖龙伟, 冷用斌, 阎映炳, 等. 自由电子激光装置数字化束流位置信号处理器研制及应用[J]. 核技术, 2018, 41(7):43-49. (Lai Longwei, Leng Yongbin, Yan Yingbing, et al. Development and application of digital beam position measurement processor for FEL[J]. Nuclear Techniques, 2018, 41(7): 43-49
[2]	廖承恩. 微波技术基础[M]. 西安: 西安电子科技大学出版社, 1994: 270−271 Liao Chengen. Fundamentals of microwave technology[M]. Xi’an: Xidian University Press, 1994: 270-271
[3]	丁海兵, 高冬平, 唐亮, 等. S波段高功率窗型水负载的设计[J]. 真空电子技术, 2016(4):26-28. (Ding Haibing, Gao Dongping, Tang Liang, et al. Design of an S-band high power window-type water load[J]. Vacuum Electronics, 2016(4): 26-28 doi: 10.3969/j.issn.1002-8935.2016.04.008
[4]	李沅锴. 波导结构水负载大功率计的研究[D]. 成都: 电子科技大学, 2014: 1-2 Li Yuankai. The research of water load power meter with waveguide structure[D]. Chengdu: University of Electronic Science and Technology of China, 2014: 1-2
[5]	陈亮. 6.5-18.0GHz大功率双脊波导水负载的研制[D]. 成都: 电子科技大学, 2008, 12-16 Chen Liang. Development of high power 6.5-18.0 GHz double ridge waveguide water load. Chengdu: University of Electronic Science and Technology of China, 2008, 12-16
[6]	Eves E, Yakovlev V. Analysis of operational regimes of a high power water load[J]. Journal of Microwave Power and Electromagnetic Energy, 2002, 37(3): 127-144. doi: 10.1080/08327823.2002.11688475
[7]	Liu Liang, Liu Fukun, Shan Jiafang, et al. Design of a new water load for S-band 750 kW continuous wave high power klystron used in EAST tokamak[J]. Plasma Science and Technology, 2007, 9(2): 223-226. doi: 10.1088/1009-0630/9/2/23
[8]	Koert P, Macgibbon P, Beck W, et al. High power water load for lower hybrid current drive at 4.6 GHz on Alcator C-Mod[C]//IEEE 22^nd Symposium on Fusion Engineering. 2007.
[9]	Krasnykh A , Maxwell T , Sheppard J , et al. Overview of high power vacuum dry RF load designs[C]//Proceeding of the 7^th International Particle Accelerator Conference. 2016: 504-506
[10]	杨立霞. S波段大功率水负载的研制[J]. 真空电子技术, 2015(3):58-60,74. (Yang Lixia. The development of S-band high-power water load[J]. Vacuum Electronics, 2015(3): 58-60,74 doi: 10.3969/j.issn.1002-8935.2015.03.016
[11]	Kuzikov S V, Rodin Y V, Vikharev A A. X-band high power loads[J]. Electromagnetic Waves and Electronic Systems, 2017, 22(1): 69-74.
[12]	Riddone G , Wuensch W, Matsumoto S, et al. High power evaluation of X-band high power loads[C]//Proceeding of Linear Accelerator Conference LINAC. 2010: 226-228
[13]	Meng Xiangcong, Shi Jiaru, Zha Hao, et al. Development of high-power S-band load[J]. Nuclear Inst and Methods in Physics Research, A, 2019, 927: 209-213.