A cryogenic linear ion trap for /sup 199/Hg/sup +/ frequency standards
J.D. Miller, M.E. Poitzsch, Flávio C. Cruz +4 more
A cryogenic linear rf trap has been constructed to study the accuracy of a clock based on laser cooled /sup 199/Hg/sup +/. Crystals of tens of ions have been observed. The residual micromotion of the ions has been minimized and Ramsey interrogation periods of 25 s have been demonstrated for the 40.5 GHz transition. This system should eventually provide a frequency standard of high precision and accuracy. We report on the development of compact, efficient, solid-state sources at 194 nm and 282 nm for laser cooling of /sup 199/Hg/sup +/ and investigation of the /sup 2/S/sub 1/2//spl rarr//sup 2/D/sub 5/2/ quadrupole transition of interest for an optical frequency standard.
Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS)•Nov 19, 2002•0 citations