Application of superconducting cavity tuner in dark photon dark matter search  

作　　者：Ming Liu Zhenghui Mi Peng Sha Weimin Pan Jing Shu Zhenxing Tang Chunlong Li Feisi He Lingxi Ye 

机构地区：[1]Institute of High Energy Physics,Chinese Academy of Sciences,Beijing,100049,China [2]University of Chinese Academy of Sciences,Beijing,100049,China [3]Key Laboratory of Particle Accelerator Physics and Technology,Chinese Academy of Sciences,Beijing,100049,China [4]School of Physics and State Key Laboratory of Nuclear Physics and Technology,Peking University,Beijing,100871,China [5]Center for High Energy Physics,Peking University,Beijing,100871,China [6]Beijing Laser Acceleration Innovation Center,Huairou,Beijing,101400,China [7]Institute of Heavy Ion Physics,Peking University,Beijing,100871,China

出　　处：《Radiation Detection Technology and Methods》2024年第3期1390-1396,共7页辐射探测技术与方法（英文）

基　　金：supported by the National Key Research and Development Program of China under Grant No.2020YFC2201501;YOUTH INNOVATION PROMOTION ASSOCIATION CAS NO.292022000038;Jing Shu is supported by Peking University under startup Grant No.7101302974;the National Natural Science Foundation of China under Grants No.12025507 and No.12150015 and is supported by the Key Research Program of Frontier Science of the Chinese Academy of Sciences(CAS)under Grants No.ZDBS-LY-7003.

摘　　要：Purpose In order to precisely control the resonant frequency of RF superconducting cavity to detect dark photon dark matter,and to be able to tune within a certain frequency range,it is necessary to design a low-temperature tuner for frequency control on the bare cavity.Methods Two type mechanical tuners have been designed for the 1.3 GHz single-cell bare cavity and 650 MHz single cell bare cavity.The tuner device tunes the frequency of RF superconducting cavity for the detection of dark photons and dark matter and measures its tuning range and accuracy in both room-temperature and low-temperature environments.Results The tuner for the 1.3 GHz cavity has a tuning accuracy of 1 Hz per step and a tuning range of 1.37 MHz at low temperature.The tuner for the 650 MHz cavity has a tuning range of 467 kHz at low temperatures,with a tuning accuracy of 1.77 Hz per step.Conclusion The designed tuner can meet the requirements of RF superconducting cavity tuning for detecting dark photons and dark matter,and its adjustable range,precision and stability ensure that the detection experiment can be carried out smoothly.

关 键 词：Superconducting cavity TUNER Dark photon Dark matter 

分 类 号：O43[机械工程—光学工程]