基于电子管振荡电路的离子阱射频源性能研究  

Performance of radio frequency source based on electronic tube oscillation circuit for ion traps

作　　者：徐华轩 敖致远 李林 李梓 何胜国 童昕 XU Huaxuan;AO Zhiyuan;LI Lin;LI Zi;HE Shengguo;TONG Xin(School of Physics and Technology,Wuhan University,Wuhan 430072,China;State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics,Innovation Academy for Precision Measurement Science and Technology,Chinese Academy of Sciences,Wuhan 430071,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]武汉大学物理科学与技术学院,湖北武汉430072 [2]中国科学院精密测量科学与技术创新研究院波谱与原子分子物理国家重点实验室,湖北武汉430071 [3]中国科学院大学,北京100049

出　　处：《量子电子学报》2025年第2期229-237,共9页Chinese Journal of Quantum Electronics

基　　金：国家重点研发计划(2021YFA1402103);中国科学院战略性先导科技专项(XDB21020200)。

摘　　要：为实现在离子阱中对离子的稳定囚禁,本研究搭建了一套基于电子管振荡电路的射频源。该装置能够实现同时输出两路幅值相同、相位相反的射频电场,其频率在2.15~4.05 MHz范围内连续可调,且无需主动进行阻抗匹配。将该装置应用于离子阱,首先对其射频频率、相位差和两路电压峰峰值进行4.68×10^(4)s的连续测量,结果表明,各参数稳定度的最小Allan偏差分别达到10^(-5)、10^(-4)和10^(-4)量级。进一步利用该装置将钙离子囚禁在离子阱中,在不关断射频源的情况下,可连续调节射频频率,并通过CCD相机观察了钙离子库仑晶体在不同囚禁参数下的结构变化。In order to achieve the stable confinement of ions in ion traps,a radio frequency(RF)source based on electronic tube oscillation circuit is constructed in this work.The device can simultaneously generate two RF electric fields with equal amplitudes and opposite phases,and its output frequencies are continuously adjustable ranging from 2.15 MHz to 4.05 MHz without active impedance matching.Over a continuous measurement period of 4.68×10^(4)s,the stabilities of frequency,phase difference,and dualchannel voltage peak-to-peak values of the RF source are evaluated after being installed on an ion trap,and the minimum Allan derivations of each parameter's stability are obtained to be 10^(-5),10^(-4),and 10^(-4) orders of magnitude,respectively.Furthermore,calcium ions are successfully confined in the ion trap equipped with the designed RF source,and by continuous adjusting the RF frequency and amplitude without turning off the RF source,the structural variations of the calcium ion Coulomb crystal are observed by CCD camera.

关 键 词：光电子学 射频源 频率调节 稳定性 Allan偏差 

分 类 号：O441.4[理学—电磁学]