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Abstract
A brief overview of the historical evolution of the method of successive oscillatory fields developed by Norman Ramsey, and some different implementations of the decurrent methodology are presented. We use time and frequency standards, from Cs atomic beams to optical standards, as examples. The scientific progress and the technological implementation achieved through a partnership between USP-SC and INMETRO are shown on the characterization of each time and frequency standard.
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1 National Institute of Metrology, Quality and Technology - INMETRO; Av. Nossa Senhora das Graças, 50, 25250-020, Duque de Caxias- RJ - Brazil; Institute of Nuclear and Energy Research - IPEN, Avenida Lineu Prestes, 2242, 05508-000, São Paulo - SP -Brazil
2 National Institute of Metrology, Quality and Technology - INMETRO; Av. Nossa Senhora das Graças, 50, 25250-020, Duque de Caxias- RJ - Brazil
3 Institute of Physics of São Carlos - University of São Paulo - IFSC-USP, Av. Trabalhador São-Carlense, 400, 13566-590, São Carlos - SP - Brazil
4 Institute of Physics of São Carlos - University of São Paulo - IFSC-USP, Av. Trabalhador São-Carlense, 400, 13566-590, São Carlos - SP - Brazil; School of Engineering of São Carlos - University of São Paulo - EESC-USP, Av. Trabalhador São-Carlense, 400, 13566-590, São Carlos - SP - Brazil