加速器用铁氧体-碳化硅混合型高次模阻尼器的研制  

Development of a ferrite-silicon carbide hybrid high-order mode damper for accelerators

作　　者：陈欣 李晨[1] 赵伟 黄刚[1] 向军[1] 李天涛[1] 杨洁[1] 刘平[1] 秦臻 Chen Xin;Li Chen;Zhao Wei;Huang Gang;Xiang Jun;Li Tiantao;Yang Jie;Liu Ping;Qin Zhen(Institute of Fluid Physics,CAEP,Mianyang 621900,China)

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2025年第2期108-113,共6页High Power Laser and Particle Beams

基　　金：国家自然科学青年基金项目(12205280)。

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,为了降低对束流的影响,束管中产生的高次模需要利用阻尼器将高频场能量转换成热量并通过冷却装置导走。介绍了某混合型高次模阻尼器的研制及主要性能。阻尼器采用的吸收材料为铁氧体和碳化硅,吸收材料通过金属化和钎焊实现与金属基板的焊接。通过CST和COMSOL软件分别开展了微波性能仿真和热仿真,对阻尼器的结构进行了优化设计。阻尼器的测试结果表明:该混合型阻尼器的吸收效率与计算结果在1.7 GHz以下频段相接近,在1.7 GHz以上高频段后,仿真吸收效率高于实测结果,相差较大;真空漏率、极限真空、水路耐压均满足超导高频腔设计需求。In large current accelerator beam tubes,high-frequency fields are generated when charged particles circulate within the beam pipe.To mitigate the impact on beam current,it is essential to use high-order mode damper to convert the high field energy into heat,which can then be dissipated by a cooling system.This paper presents the research,fabrication,and key performance characteristics of a hybrid high-order mode damper.The absorbing materials utilized in the damper include ferrite and silicon carbide,which can be welded to metal substrates through metallization and welding techniques.Microwave performance simulations and thermal simulations were conducted using CST and COMSOL software,respectively,leading to an optimized damper structure.Test results demonstrate that the absorption efficiency of the hybrid damper aligns closely with the calculated values in the frequency range below 1.7 GHz.However,the simulated absorption efficiency exceeds the measured results significantly above 1.7 GHz.Additionally,the vacuum leak rates,ultimate vacuum,and water resistance meet the design requirements for superconducting high-frequency cavities.

关 键 词：高次模 阻尼器 铁氧体 碳化硅 焊接 

分 类 号：TL503.2[核科学技术—核技术及应用]