title: Design and metrological features of microwave synthesizers for atomic fountain frequency standard.
abstract: In this paper we describe the improved redesign of the microwave frequency synthesizers for Laboratoire National d'Essais-Systèmes de Référence Temps-Espace (LNE-SYRTE) atomic fountains. The synthesizers use a cryogenic oscillator to generate both Cs and Rb hyperfine frequencies based on a new distribution frequency of 1 GHz. The main metrological features (phase noise, long-term phase stability, and spectral purity) of the synthesizers have been measured in situ connected to an atomic fountain and are compatible with an accuracy goal of 10(-16) for the atomic fountains. The simultaneous test of two different synthesizers on the FO2 atomic fountain at the 10(-16) level also is reported.
authors: Laboratoire National d'Essais-Systèmes de Référence Temps-Espace (LNE-SYRTE), CNRS-UMR8630, Observatoire de Paris, 61, Av de l'Observatoire, Paris, France.
authors: Damien
authors: D
authors: Chambon
authors: Michel
authors: M
authors: Lours
authors: Frederic
authors: F
authors: Chapelet
authors: Sebastien
authors: S
authors: Bize
authors: Michael E
authors: ME
authors: Tobar
authors: Andre
authors: A
authors: Clairon
authors: Giorgio
authors: G
authors: Santarelli
mesh_terms: D004581:Electronics; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005602:France; D008872:Microwaves; D009991:Oscillometry / Q000295:instrumentation* / Q000379:methods / Q000592:standards*; D012015:Reference Standards; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*; D013997:Time Factors; D014159:Transducers