{"title":"The USNO Rubidium Fountain","authors":"S. Peil, S. Crane, T. Swanson, C. Ekstrom","doi":"10.1109/FREQ.2006.275402","DOIUrl":null,"url":null,"abstract":"We present initial evaluations of our rubidium atomic fountain - the first of six that are designed for continuous operation and for inclusion into the USNO timescale. We have demonstrated short-term performance in weak-gradient, MOT-loaded operation of 1.3 times 10-13/taufrac12. We have made a comparison between our rubidium fountain (NRF1) and cesium fountain (NCF), demonstrating a relative stability characterized by white-frequency noise down to an Allan deviation of 1.5 times 10-15. Assuming that each fountain exhibits the same noise type, the data are consistent with an Allan deviation for our rubidium fountain of 7 times 10-16 at 11 hours. Further upgrades to our cesium fountain should enable more precise comparisons","PeriodicalId":445945,"journal":{"name":"2006 IEEE International Frequency Control Symposium and Exposition","volume":"13 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2006-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"5","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2006 IEEE International Frequency Control Symposium and Exposition","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/FREQ.2006.275402","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 5
Abstract
We present initial evaluations of our rubidium atomic fountain - the first of six that are designed for continuous operation and for inclusion into the USNO timescale. We have demonstrated short-term performance in weak-gradient, MOT-loaded operation of 1.3 times 10-13/taufrac12. We have made a comparison between our rubidium fountain (NRF1) and cesium fountain (NCF), demonstrating a relative stability characterized by white-frequency noise down to an Allan deviation of 1.5 times 10-15. Assuming that each fountain exhibits the same noise type, the data are consistent with an Allan deviation for our rubidium fountain of 7 times 10-16 at 11 hours. Further upgrades to our cesium fountain should enable more precise comparisons
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