Development of an optical standard based on an intercombination transition of stro...
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Time and Frequency metrology: Cesium atomic beam clock and a fountain with cold atoms
Full text
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| Author(s): |
Flavio Teles Carvalho da Silva
Total Authors: 1
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| Document type: | Doctoral Thesis |
| Press: | São Carlos. |
| Institution: | Universidade de São Paulo (USP). Instituto de Física de São Carlos (IFSC/BT) |
| Defense date: | 2002-05-17 |
| Examining board members: |
Vanderlei Salvador Bagnato;
Luis Gustavo Marcassa;
Paulo Alberto Nussenzveig;
Valentin Obac Roda;
Jose Carlos Sartori
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| Advisor: | Vanderlei Salvador Bagnato; Monica Santos Dahmouche |
| Abstract | |
This work is part of the program of the establishment of time and frequency metrology in Brazil. To realize this objective we are developing two atomic frequency standards: optically pumped cesium-beam frequency standard, currently in operation, and an atomic fountain, which is in progress. The performance of the Cs beam standard was evaluated by the measurements of the signal-to-noise ratio, velocity distribution and some major frequency shifts. The measurement short-term stability is σ(τ) =(1.78x10-11) x τ-1/2 . The atomic fountain construction process (vacuum chamber, the control system, microwave cavities and synthesizers) is described in detail (AU) | |