Radio frequency measurements of cloud size in a linear ion trap

Author

Prestage, John D. ; Tjoelker, Robert L. ; Maleki, Lute

Author_Institution

Jet Propulsion Lab., California Inst. of Technol., Pasadena, CA, USA

fYear

1997

fDate

28-30 May 1997

Firstpage

225

Lastpage

227

Abstract

In this paper we describe a method for measuring the size of an ion cloud inside a linear ion trap. At ~10^-12 the 2nd order Doppler shift for trapped mercury ion frequency standards is one of the largest frequency offsets in these lamp based systems. Its measurement to the 1% level would represent an advance in insuring the very long term stability of these standards to the 10^-14 or better level. This measurement is implemented with a novel 12-rod linear ion trap which we have developed and describe here

Keywords

Doppler effect; Doppler shift; atomic clocks; frequency measurement; frequency stability; magnetic field effects; magnetic resonance; measurement standards; particle traps; 2nd order Doppler shift; cloud size; frequency offsets; harmonicity; ion cloud; linear ion trap; long term stability; radio frequency measurement; trapped mercury ion frequency standards; Clocks; Clouds; Doppler shift; Frequency measurement; Navigation; Radio frequency; Satellite ground stations; Size measurement; Space vehicles; Stability;

fLanguage

English

Publisher

ieee

Conference_Titel

Frequency Control Symposium, 1997., Proceedings of the 1997 IEEE International

Conference_Location

Orlando, FL

Print_ISBN

0-7803-3728-X

Type

conf

DOI

10.1109/FREQ.1997.638548

Filename

638548