氢原子钟蓝宝石谐振腔的设计和实验表现  

A Design of Sapphire Loaded Cavity for H-maser and Its Experimental Performance

作　　者：代克[1,2] 张燕军[1] 王文明[1,2] 张为群[1] 

机构地区：[1]中国科学院上海天文台,上海200030 [2]中国科学院研究生院,北京100039

出　　处：《时间频率学报》2010年第2期103-107,共5页Journal of Time and Frequency

基　　金：上海市自然科学基金资助项目(10ZR1435900)

摘　　要：为了设计主动型氢原子钟蓝宝石谐振腔的结构尺寸,对根据TE011模式下蓝宝石谐振腔的麦克斯韦尔方程组推出的超越方程进行了求解,利用电磁场有限元分析软件对蓝宝石腔进行了仿真分析。通过计算S参数,确认了所设计的氢原子钟蓝宝石谐振腔实现氢脉泽自激振荡的现实性。利用SOHM-4型氢钟机架作为实验床,在离子泵电流1.1 mA时,得到了强度为-102.93 dbm的脉泽振荡信号。此信号强度与标准的主动型氢原子钟在相同的离子泵电流下的信号强度相仿。To design the dimensions of sapphire loaded cavity for active H maser,we solved the transcendental equation which was deduced from Maxwell equations for the cavity in TE011 mode.By FEM（finite element methods） simulation of the cavity,the solution we got was confirmed.Then the ability of the cavity to sustain self-oscillation was calculated.With the active H maser SOHM-4 as a experimental bed,an H maser signal with oscillation power of-102.93 dBm was obtained from the sapphire loaded cavity,while the ion pump flux was about 1.1 mA.The signal power is almost as same as that of the standard active H maser,for the same ion pump flux.

关 键 词：氢钟 蓝宝石谐振腔 有限元分析 

分 类 号：TM935.115[电气工程—电力电子与电力传动]