الساعات الذرية : الذرات كمعايير أولية للذبذبات و الزمن

الملخص EN

In this article, we present the atomic clock as time and frequency standard and as one of the peaceful uses of atoms for development.

In the first part, we present the general principles of time and frequency metrology and the key role of the caesium atom in this field as well as the main applications of atomic clocks.

In the second part we introduce the different clock technologies based on Ramsey method, with a focus on atomic beam clocks and atomic fountain clocks.