EFRATOM Rubidium Lamp Frequency Standard
Lampe au rubidium étalon de fréquence
Rubidium Lampe, Frequenz Standard

Efratom Elektronik was established in 1971 in Munich (Germany) by Gerhard Hübner and Ernst Jechart. Efratom established a branch in Irvine (California) in 1973 and manufactured compact rubidium frequency standards there for a variety of customers. The firm became a division of Ball Aerospace in 1982 and then part of Datum in 1995. Symmetricom acquired Datum in 2002.

A rubidium standard or rubidium atomic clock is a frequency standard in which the hyperfine transition of electrons in rubidium-87 atoms (at 6 834 682 610.904 Hz) is used to control the output frequency. The intensity of light from the rubidium discharge lamp that reaches a photodetector through a resonance cell will drop by about 0.1% when the rubidium vapor in the resonance cell is exposed to microwave power near the transition frequency. The crystal oscillator is stabilized to the rubidium transition by detecting the light dip while sweeping an RF synthesizer (referenced to the crystal) through the transition frequency.

See also • Voir aussi • Siehe auch : EFRATOM LPRO-101 Rubidium Frequency Standard 10 MHz.

 

Hauteur • Height • Höhe : 17 mm • 11/16"
Diamètre • Diameter • Durchmesser : 9 mm • 3/8"

 

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