Title :
Recent progress of an atomic fountain frequency standard NMIJ-F1 (2006 – 2007)
Author :
Yanagimachi, S. ; Takamizawa, A. ; Yoshida, Y. ; Yanagimachi, A. ; Watabe, K. ; Hagimoto, K. ; Ikegami, T.
Author_Institution :
Nat. Metrol. Inst. of Japan (NMIJ), AIST, Tsukuba
Abstract :
We review the current status of development of NMIJ-F1 for the recent two years. We have performed frequency measurement a few times per year with a combined (Type A, Type B) uncertainty of 3.9times10-15. For more frequent contribution to keep International Atomic Time (TAI), optics and microwave system have been modified.
Keywords :
atomic clocks; frequency standards; measurement uncertainty; International Atomic Time; atomic fountain frequency standard NMIJ-F1; frequency measurement; measurement uncertainty; microwave system; optics system; Atom optics; Frequency; Laser tuning; Masers; Microwave ovens; Optical amplifiers; Optical attenuators; Optical saturation; Power lasers; Semiconductor lasers;
Conference_Titel :
Precision Electromagnetic Measurements Digest, 2008. CPEM 2008. Conference on
Conference_Location :
Broomfield, CO
Print_ISBN :
978-1-4244-2399-6
Electronic_ISBN :
978-1-4244-2400-9
DOI :
10.1109/CPEM.2008.4574784
