Title :
A mercury linear ion trap frequency standard for the USNO
Author :
Tjoelker, R.L. ; Prestage, J.D. ; Maleki, L.
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
fDate :
31 May-2 Jun 1995
Abstract :
A frequency standard for the USNO based on mercury ions in a Linear Ion Trap is operational. Initial measurements of the new standard LITS-3 against an active hydrogen maser gives a fractional frequency stability of σy(τ)=7.5×10-14/τ 1/2 for measuring intervals up to 10,000 seconds. Stability measurements for longer averaging intervals against another ion trap standard have commenced
Keywords :
atomic clocks; frequency measurement; frequency stability; measurement standards; mercury (metal); particle traps; trapped ions; 10000 sec; Hg; LITS-3; USNO; frequency stability; frequency standard; linear ion trap; mercury ions; time interval measurements; Atomic measurements; Clocks; Electron traps; Frequency measurement; Hydrogen; Magnetic field measurement; Magnetic shielding; Masers; Measurement standards; Stability;
Conference_Titel :
Frequency Control Symposium, 1995. 49th., Proceedings of the 1995 IEEE International
Conference_Location :
San Francisco, CA
Print_ISBN :
0-7803-2500-1
DOI :
10.1109/FREQ.1995.483886
