Mainz 2017 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 13: Precision Measurements and Metrology: Optical Clocks
Q 13.4: Talk
Monday, March 6, 2017, 17:45–18:00, P 104
First campaigns with PTB transportable optical lattice clock — •J. Grotti1, S. Koller1, S. Vogt1, A. Al-Masoudi1, S. Dörscher1, S. Herbers1, S. Häfner1, U. Sterr1, C. Lisdat1, H. Denker2, M. Pizzocaro3, P. Thoumany3, B. Rauf3, C. Clivati3, M. Zucco3, F. Levi3, D. Calonico3, A. Rolland4, F. Baynes4, and H. Margolis4 — 1Physikalisch-Technische Bundesanstalt, Bundesallee 100, 38116 Braunschweig, Germany — 2Institut für Erdmessung - Leibniz Universität Hannover, Schneiderberg 50, 30167 Hannover, Germany — 3Istituto Nazionale di Ricerca Metrologica, Strada delle Cacce 91 , 10135 Torino, Italy — 4National Physical Laboratory, Teddington, Middlesex TW11 0LW, UK
A transportable lattice clock based on 87Sr atoms has been built at PTB and successfully tested in the laboratory. The clock showed a stability of 1.3·10−15/√τ and a systematic uncertainty of 7.4· 10−17. Furthermore, its frequency is in agreement with the stationary system of PTB. The system has been placed inside a car trailer and used for two measurement campaigns: A proof of principle experiment of relativistic geodesy in the Frejus tunnel, at the Italy-France boarder, and a local measurement of the 171Yb/87Sr clock frequency ratio at Torino. These campaigns were performed in collaboration with INRIM, NPL and the Institut für Erdmessung (IfE), Leibniz University Hannover. Results will be shown in the talk. This work is supported by QUEST, DFG (RTG 1729, CRC 1128), EU-FP7 (FACT) and EMRP (ITOC). The EMRP is jointly funded by the EMRP participating countries within EURAMET and the European Union.