Unprecedented stability of frequency in superconducting, triple-cavity ruby maser oscillator achieved by incorporation of amplitude-control subsystem. New design enhances ultra-stable measurements of time by reducing fluctuations to 2 X 10 to negative 19th power routinely, and to as little as 10 to negative 20th power in exceptional cases. Currents induced in superconducting pickup coil by changes in magnetic field in ruby. Currents from coil fed to superconducting quantum-interference device (SQUID) magnetometer, output used to generate control signal for electronically variable attenuator. Attenuator varies pump-signal amplitude in response to magnetic-field fluctuations in ruby. Very high feedback-loop gain used for sensitivity of control and adequate compensation of fluctuations.


    Zugriff

    Zugriff über TIB

    Verfügbarkeit in meiner Bibliothek prüfen


    Exportieren, teilen und zitieren



    Titel :

    Ultra-Stable Superconducting-Maser Oscillator


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    01.06.1989



    Medientyp :

    Sonstige


    Format :

    Keine Angabe


    Sprache :

    Englisch




    Maser Oscillator With Dielectric Resonators

    Dick, G. John / Strayer, Donald M. | NTRS | 1988


    Performance Of Superconducting-Cavity Maser

    Dick, G. John / Wang, Rabi T. | NTRS | 1991


    Temperature Compensated Sapphire Resonator for Ultra-Stable Oscillator Capability

    Dick, G. J. / Santiago, D. G. / Wang, R. T. | NTRS | 1994


    An Advanced Synthesized Ultra-Stable Oscillator for Spacecraft Applications

    Wallis, R. E. / Weaver, G. L. / Reinhart, M. J. et al. | British Library Conference Proceedings | 2005


    The MASER 9 and MASER 10 Microgravity Rocket Missions

    Lockowandt, C. / Loth, K. / Florin, G. et al. | British Library Conference Proceedings | 2004