Title :
Compact cesium atomic fountain clock
Author :
Huang, Mao Sheng ; Yao, A. ; Peng, Jtn Long ; Chen, Chuan Chuan ; Hsu, Shau Wei ; Hsiao, E. N Ming ; Kou, C.S. ; Liao, Chia Shu
Author_Institution :
Center for Meas. Stand., ITRI, Taiwan
Abstract :
For most of the cesium fountain clocks, the microwave cavities together with the cesium atoms are enclosed in a huge vacuum chamber. In our new design, the microwave cavity is not in the vacuum chamber. A fused quartz tube is inserted through a cylindrical cavity via two 10-mm-diameter-holes at the end caps of the cavity. In such a configuration, the vacuum feed-through for the wave-guide is not necessary, and the size of the vacuum chamber can be obviously reduced. Some perturbations of the microwave cavity including cavity quality factor and resonant frequency from inserting in the quartz tube are estimated. It seems that the quartz tube does not cause serious problems
Keywords :
Q-factor; atomic clocks; frequency standards; vacuum techniques; 10 mm; Cs; cavity quality factor; cesium atoms; cesium fountain clocks; compact cesium atomic fountain clock; cylindrical cavity; fused quartz tube; microwave cavities; resonant frequency; vacuum feed-through; Atomic clocks; Atomic measurements; Charge carrier processes; Collision mitigation; Degradation; Dielectric losses; Frequency estimation; Measurement standards; Q factor; Resonant frequency;
Conference_Titel :
Frequency and Time Forum, 1999 and the IEEE International Frequency Control Symposium, 1999., Proceedings of the 1999 Joint Meeting of the European
Conference_Location :
Besancon
Print_ISBN :
0-7803-5400-1
DOI :
10.1109/FREQ.1999.840699
