Soo Heyong Lee et al 2009 Metrologia 46 227 doi:10.1088/0026-1394/46/3/009
Accuracy evaluation of an optically pumped caesium beam frequency standard KRISS-1
Soo Heyong Lee1, Young-Ho Park2, Sang Eon Park1, Ho Seong Lee1, Sung Hoon Yang1, Dai-Hyuk Yu1 and Taeg Yong Kwon1
Show affiliationsWe report on Korea's first optically pumped primary frequency standard (KRISS-1) developed at the Korea Research Institute of Standards and Science. Although a relatively small microwave cavity (the cavity drift region is about 36 cm in length) has been employed in this experiment, we achieved our desired frequency accuracy by applying the regularized inverse on the Ramsey spectrum analysis and compensating the effect of the evanescent field inside the cavity. KRISS-1 typically performs at a short term stability of 
with a combined uncertainty of 1.0 × 10−14.
- PACS
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06.20.fb Standards and calibration
07.57.Hm Infrared, submillimeter wave, microwave, and radiowave sources
- Subjects
- Dates
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Issue 3 (June 2009)
Received 12 November 2008, in final form 25 January 2009
Published 24 March 2009
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Accuracy evaluation of an optically pumped caesium beam frequency standard KRISS-1
Soo Heyong Lee et al 2009 Metrologia 46 227
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