Citation
Abstract
A high-performance frequency standard based on !°°Hgt ions confined in a hybrid RF/dc linear ion trap has been demonstrated. This trap permits storage of large numbers of ions with reduced susceptibility to the second-order Doppler effect caused by the RF confining fields. A 160-mHz-wide atomic resonance line for the 40.5-GHz clock transition is used to steer the output of a 5-MHz crystal oscillator to obtain a stability of 2 x 107° for 24,000-second averaging times. Measurements with a 37-mHz line width for the Hgt clock transition demonstrate that the inherent stability for this frequency standard is better than I x 107° at 10,000-second averaging times.
Details
- Volume
- 42-108
- Published
- February 15, 1992
- Pages
- 10–18
- File Size
- 474.0 KB