高能同步辐射光源用铁氧体高次模阻尼器的研制

陈欣; 李晨; 赵伟; 向军; 李天涛; 黄刚; 杨洁; 刘平; 秦臻

doi:10.11884/HPLPB202537.240278

高能同步辐射光源用铁氧体高次模阻尼器的研制

doi: 10.11884/HPLPB202537.240278

中国工程物理研究院流体物理研究所，四川绵阳 621900

基金项目: 国家自然科学基金项目(12205280)

详细信息

作者简介:
陈　欣，chenxin10698@126.com

通讯作者:
李　晨，st.eddie@163.com。

中图分类号: TL503.2
计量
- 文章访问数: 99
- HTML全文浏览量: 34
- PDF下载量: 9
- 被引次数: 0
出版历程
- 收稿日期: 2024-08-26
- 修回日期: 2025-03-03
- 录用日期: 2025-03-03
- 网络出版日期: 2025-03-29
- 刊出日期: 2025-04-15

Development of ferrite high-order mode damper for High Energy Photon Source

Institute of Fluid Physics, CAEP, Mianyang 621900, China

摘要

摘要: 大电流加速器束管中，当带电粒子流通过束管时，会在束管中激励起高频场影响束流大小和稳定性，还会在超导腔运行中带来额外的热损耗，影响超导腔本身运行的稳定性，所以必须对高次模进行有效控制。采用铁氧体为吸波材料吸收高次模，通过金属化和钎焊实现铁氧体与铜基板的焊接，然后与铜束管、冷却系统焊接获得铁氧体高次模阻尼器。使用CST软件仿真了铁氧体高次模阻尼器在不同频率下的微波性能，并与实测结果对比，发现在测试频段内可以有效抑制高次模，但是一定频段内两者的结果存在一定差异。使用COMSOL软件仿真了铁氧体高次模阻尼器工作时的温度分布状态，并与测试结果进行了比较；热测结果表明，吸收功率10.14 kW时，吸收效率达到77.4%。真空漏率、极限真空、水路耐压测试结果均满足超导高频腔设计需求。
- 高次模 /
- 阻尼器 /
- 铁氧体 /
- 焊接 /
- 吸收效率
Abstract: In high-current accelerator beam tubes, the flow of charged particles induces a high-frequency field within the tube, which affects the current and stability of the beam. Additionally, this field leads to extra heat loss during the operation of the superconducting cavity, impacting its operational stability. Therefore, it is necessary to effectively control the high-order mode. This study employs ferrite as an absorbing material to absorb high-order modes. The ferrites were welded to copper substrates through metallization and brazing, and then they were joined with the copper beam tube and cooling system to create a ferrite high-order mode damper. The microwave performance of the ferrite high-order mode damper at various frequencies was simulated using CST software, and compared with the measured results. It is found that the high-order mode can be effectively suppressed in the test frequency band, but there are some differences between the two results in a certain frequency band. Additionally, COMSOL software was utilized to simulate the temperature distribution of the ferrite high-order mode damper during operation, and these simulations were compared with experimental data. The test results for loaded power show that the absorption efficiency reaches 77.4% when the absorbed power is 10.14 kW. Furthermore, results of vacuum leak rates, ultimate vacuum and water-resistant all conform to the design requirements for superconducting high-frequency cavities.
- high-order mode /
- damper /
- ferrite /
- welding /
- absorption efficiency

HTML全文

图 1 铁氧体高次模阻尼器在吸收功率为10 kW时温度分布仿真结果

Figure 1. Simulation results of temperature distribution for the high-order mode with an absorbed power of 10 kW

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图 2 高次模阻尼器结构示意图

Figure 2. Schematic of the ferrite high-order mode damper

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图 3 焊接质量效果图

Figure 3. Quality diagram of welding effects

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图 4 铁氧体高次模阻尼器的高功率测试装配图

Figure 4. High power test assembly diagram of ferrite high-order mode damper

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图 5 铁氧体高次模阻尼器仿真与实测吸收效率（无短路活塞）

Figure 5. Simulation and measurement of absorption efficiency of ferrite high-order mode damper (no short piston)

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图 6 不同吸收功率下进出口水的温升(约0.4 MPa)

Figure 6. Temperature rise of inlet and outlet water under different absorbed power (about 0.4MPa)

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图 7 不同输入功率下吸收功率及吸收效率

Figure 7. Absorption power and absorption efficiency under different input power

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表 1 高次模阻尼器主要的设计指标

Table 1. The main design metrics of the high-order mode damper

working mode	absorbed power/ kW	absorption efficiency	absorbing material	vacuum leak rates/ (Pa·L·s⁻¹)	ultimate vacuum/ Pa	water- resistant/ MPa	temperature difference between the outlet and inlet cooling water/℃
continuous wave	≥10	operating frequency band (0.6～3.0GHz)≥30%, critical frequency bands (0.8～1.5GHz)≥50%	after welding, the surface of ferrite shall be clean and flat, without particle shedding or cracks	≤1×10⁻⁷	≤6.5×10⁻⁸	≥0.9	when the absorbed power is 10 kW, the temperature rise of the outlet and inlet cooling water is ≤ 5 ℃.

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