Absolute frequency measurement of the electric quadrupole transition of 88Sr+
| Autor: | Pierre Dubé, Marina Gertsvolf, John E. Bernard |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Physics
optical atomic clock business.industry Terahertz radiation Tracking (particle physics) 01 natural sciences Stability (probability) 010305 fluids & plasmas Ion Optics GPS frequency link Assisted GPS 0103 physical sciences Quadrupole Electronic engineering Global Positioning System Black-body radiation absolute frequency measurement single ion clock 010306 general physics business |
| Zdroj: | 2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFC). |
| Popis: | We report a new measurement of the 445 THz electric quadrupole transition of the strontium ion made using a GPS link to the SI second. Compared to our previous measurement reported in 2012, the operation of the optical clock has been improved in several ways, especially from a reduction of the micromotion shifts, of the black body radiation shift, and of the servo tracking errors. Moreover, the stability of the clock has been improved three-fold with state-preparation. The uncertainty of the optical clock during the measurement campaign was 7 mHz. The uncertainty of the frequency measurement was 0.75 Hz, limited primarily by the GPS link and to a lesser extent by the measurement statistics. The new frequency measurement is in good agreement with previously reported values. 2017 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS), 9-13 July 2017, Besancon, France |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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