Title :
Hg+ trapped ion standard with the superconducting cavity maser oscillator
Author :
Prestage, J.D. ; Tjoelker, R.L. ; Wang, R.T. ; Dick, G.J. ; Maleki, L.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
fDate :
4/1/1993 12:00:00 AM
Abstract :
The frequency stability of an atomic standard based on 199 Hg+ ions confined in a hybrid RF/DC linear trap is described. The 40.5-GHz clock transition has been measured to be 17 mHz wide, representing a quality factor greater than 2×1012. A 160-mHz line is used to steer the output of a 5-MHz crystal oscillator to obtain a stability of 2×10-15 for 24000-s averaging times. In a separate measurement, a 37-mHz line is used to steer the output of the superconducting cavity maser oscillator to reach 1×10-15 stability at 10000 s
Keywords :
atomic beams; atomic clocks; frequency measurement; frequency stability; masers; measurement standards; mercury (metal); positive ions; superconducting devices; 40.5 GHz; 5 MHz; Hg+; atomic standard; clock transition; frequency stability; hybrid RF/DC linear trap; quality factor; superconducting cavity maser oscillator; trapped ion standard; Clocks; Electron traps; Extraterrestrial measurements; Frequency; Masers; Mercury (metals); Optical buffering; Optical filters; Oscillators; Stability;
Journal_Title :
Instrumentation and Measurement, IEEE Transactions on
