Title :
Mercury-ion clock based on linear multi-pole ion trap
Author :
Prestage, John D. ; Tjoelker, Robert L. ; Maleki, Lute
Author_Institution :
Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA
Abstract :
Buffer gas cooled clocks rely on large numbers of ions, typically ~107, optically pumped by a discharge lamp at scattering rates of a few photons per second per ion. To reduce the second-order Doppler shift from space charge repulsion of ions from the trap node line, novel multi-pole ion traps are now being developed where ions are weakly bound with confining fields that are effectively zero through the trap interior and grow rapidly near the trap electrode walls
Keywords :
Boltzmann equation; Doppler shift; atomic clocks; frequency standards; mercury (metal); optical pumping; space charge; trapped ions; Boltzmann equation; Hg; Rabi pulse; buffer gas cooled clocks; effectively zero confining fields; ion cloud temperature; linear multipole ion trap; mercury-ion clock; second-order Doppler shift reduction; space charge repulsion of ions; trap electrode walls; trap node line; weakly bound ions; Clocks; Doppler shift; Electrodes; Lamps; Optical buffering; Optical pumping; Optical scattering; Particle beam optics; Particle scattering; Space charge;
Conference_Titel :
Frequency Control Symposium and Exhibition, 2000. Proceedings of the 2000 IEEE/EIA International
Conference_Location :
Kansas City, MO
Print_ISBN :
0-7803-5838-4
DOI :
10.1109/FREQ.2000.887441
