超导腔数字自激垂直测试系统

杨际森; 潘卫民; 王洪磊; 刘佳冀; 王牧源; 周全; 贺斐思; 沙鹏; 林海英; 王群要; 王光伟; 米正辉

doi:10.11884/HPLPB202032.190320

超导腔数字自激垂直测试系统

doi: 10.11884/HPLPB202032.190320

杨际森^{1, 2, 3, 4,},
潘卫民^{1, 2, 3, 4},
王洪磊^{1, 2, 3, 4},
刘佳冀^{1, 2, 3},
王牧源^{1, 3, 4},
周全^{1, 2, 3, 4},
贺斐思^{1, 3, 4},
沙鹏^{1, 3, 4},
林海英^{1, 3, 4},
王群要^{1, 3, 4},
王光伟^{1, 3, 4},
米正辉^{1, 3, 4, ,}

1.
中国科学院高能物理研究所，北京 100049
2.
中国科学院大学，北京 100049
3.
中国科学院粒子加速器物理与技术重点实验室，北京 100049
4.
中国科学院高能物理研究所射频超导与低温研究中心，北京 100049

基金项目: 国家自然科学基金项目（11805216）

详细信息

作者简介:
杨际森（1992—），男，博士研究生，从事超导腔垂直测试研究；yangjisen@ihep.ac.cn

通讯作者:
米正辉（1986—），男，博士，从事射频超导研究；mizh@ihep.ac.cn

中图分类号: TL503.2
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- 被引次数: 15
出版历程
- 收稿日期: 2019-08-28
- 修回日期: 2019-12-12
- 刊出日期: 2020-03-06

Digital self-excited vertical test system of superconducting cavity

Yang Jisen^{1, 2, 3, 4
,},
Pan Weimin^{1, 2, 3, 4},
Wang Honglei^{1, 2, 3, 4},
Liu Jiaji^{1, 2, 3},
Wang Muyuan^{1, 3, 4},
Zhou Quan^{1, 2, 3, 4},
He Feisi^{1, 3, 4},
Sha Peng^{1, 3, 4},
Lin Haiying^{1, 3, 4},
Wang Qunyao^{1, 3, 4},
Wang Guangwei^{1, 3, 4},
Mi Zhenghui^{1, 3, 4
, ,}

1.
Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049
2.
University of Chinese Academy of Sciences, Beijing 100049, China
3.
Key Laboratory of Particle Acceleration Physics and Technology, Chinese Academy of Sciences, Beijing 100049, China
4.
Center for Superconducting RF and Cryogenics, Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要:
基于数字自激算法设计并实现的超导腔垂直测试系统提高了超导腔的垂直测试效率，为先进光源技术研发与测试平台（PAPS）的超导腔批量化生产提供了重要保障；垂直测试系统的射频前端和时钟分配系统采用了二次上下变频方案，可以在一定范围内灵活设置测试系统自激环路的工作频率，增大了该测试系统的工作带宽。利用此系统完成了1.3 GHz 9-cell超导腔的通带频率测试，结果表明，该测试系统能有效避免不同模式之间的串扰，具备较强的频率分辨能力（＜800 kHz），保证多单元超导腔性能验证的进行。
- 超导腔 /
- 垂直测试 /
- 数字自激 /
- 二次上下变频 /
- 数字低电平
Abstract:
Vertical test is an important method for characterizing the performance of superconducting cavities. We designed an superconducting cavity vertical test system based on digital self-excited algorithm and the technology of low-level radio frequency, which could improve the vertical test efficiency of superconducting cavities. The RF front-end and clock distribution system of the vertical test system adopts the second up-and-down conversion scheme. To some extent, the working frequency of the digital self-excited loop of the vertical test system can be set flexibly, and the working bandwidth of the test system is increased. The test results of the pass-band frequency of the 1.3 GHz 9-cell superconducting cavity show that the vertical test system has strong frequency resolution (＜800 kHz) to ensure the smooth progress of the multi-cell superconducting cavity pass-band test.
- superconducting cavity /
- vertical test /
- digital self-excited loop /
- second up-and-down frequency conversion /
- digital low level radio frequency

HTML全文

图 1 自激环路原理

Figure 1. Schematic of the self-excited loop

下载: 全尺寸图片幻灯片

图 2 第一次和第二次上下变频原理图

Figure 2. Schematic of the first and the second up-and-down frequency conversion

下载: 全尺寸图片幻灯片

图 3 数字信号处理算法

Figure 3. Scheme of digital signal processing

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图 4 坐标旋转示意图

Figure 4. Diagram of coordinate rotation

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图 5 射频前端线性度测量

Figure 5. Measurement results of radio frequency front end

下载: 全尺寸图片幻灯片

图 6 数字自激系统运行过程中Pickup信号的波形图

Figure 6. Free running self-excited loop

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图 7 场衰减时间测量

Figure 7. Decay time measurement

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图 8 1.3 GHz 9单元超导腔通带模式频率

Figure 8. Pass-band mode frequency of 1.3 GHz 9-cell cavity

下载: 全尺寸图片幻灯片

表 1 1.3 GHz 9单元超导腔通带频率测试

Table 1. Pass-band mode frequency of 1.3 GHz 9-cell superconducting cavity

mode	frequency/MHz
mode	temperature is 298.15 K	temperature is 2 K
π/9	1 275.515 80	1 277.384 00
2π/9	1 278.776 20	1 280.695 08
3π/9	1 281.090 20	1 283.006 44
4π/9	1 282.928 40	1 284.837 76
5π/9	1 287.449 80	1 289.295 32
6π/9	1 291.568 20	1 293.490 92
7π/9	1 295.010 60	1 296.945 96
8π/9	1 297.301 20	1 299.237 56
π	1 298.076 00	1 300.017 72

下载: 导出CSV

参考文献(12)

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