4 research outputs found

    Optimization of a Langmuir-Taylor detector for lithium

    Full text link
    This paper describes the construction and optimization of a Langmuir-Taylor detector for lithium, using a rhenium ribbon. The absolute detection probability of this very sensitive detector is measured and the dependence of this probability with oxygen pressure and surface temperature is studied. Sources of background signal and their minimization are also discussed in details. And a comparison between our data concerning the response time of the detector and literature values is given. A theoretical analysis has been made: this analysis supports the validity of the Saha-Langmuir law to relate the ionization probability to the work function. Finally, the rapid variations of the work function with oxygen pressure and temperature are explained by a chemical equilibrium model.Comment: 11 pages, 7 figures, to appear in Rev. Sci. Instru

    InterféromÚtre de Mach-Zehnder atomique fonctionnant avec le lithium : premiers signaux

    No full text
    Nous venons d'observer les premiers signaux d'interférence atomique grùce à un interféromÚtre atomique de Mach-Zehnder à trois réseaux, fonctionnant avec un jet supersonique de lithium. La diffraction utilise des ondes lasers quasi résonnantes à 671 nm et fonctionne dans le régime de Bragg et les atomes de lithium sont détectés par un détecteur de Langmuir-Taylor
    corecore