Experimental operation of a gyro-travelling wave amplifier with a helically corrugated interaction region is presented. Two thermionic cathode electron guns in Pierce-type geometries were used to generate rectilinear electron beams of 1 /spl mu/s pulse duration. One diode was operated at 185 keV energy with a current of 7.5 A and the other was operated with an applied potential of 115 kV producing a current of 18 A. Transverse velocity was imparted to the electron beam in a 'kicker'. The electron beam acquired a transverse velocity typically with a pitch factor of between 1 and 1.2. The resulting electron beam described a helical, axis-encircling trajectory. The coupling between the second harmonic cyclotron mode of the gyrating electron beam and the radiation field occurred in the region of near infinite phase velocity over a broad frequency band using a cylindrical waveguide with a helical corrugation on its internal surface. With a beam energy of 185 keV, the amplifier achieved a maximum output power of 220 kW, saturated gain of 24 dB, saturated bandwidth of 8.4 to 10.4 GHz (21% relative bandwidth) and an efficiency of 16%. With a beam energy of 115 keV, the amplifier achieved a maximum output power of 160 kW and an efficiency of 8%.


    Zugriff

    Zugriff prüfen

    Verfügbarkeit in meiner Bibliothek prüfen

    Bestellung bei Subito €


    Exportieren, teilen und zitieren



    Titel :

    Results from thermionic cathode gyro-TWA experiments


    Beteiligte:
    Phelps, A.D.R. (Autor:in) / Ronald, K. (Autor:in) / He, W. (Autor:in) / Young, A.R. (Autor:in) / Rafferty, E.G. (Autor:in) / Cross, A.W. (Autor:in) / Whyte, C.G. (Autor:in) / Thomson, J. (Autor:in) / Robertson, C.W. (Autor:in)


    Erscheinungsdatum :

    2004-01-01


    Format / Umfang :

    122389 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    Thermionic gyro-BWO experiment using a helical interaction waveguide

    He, W. / Cross, A.W. / Whyte, C.G. et al. | IEEE | 2004


    Barium-Dispenser Thermionic Cathode

    Wintucky, Edwin G. / Green, M. / Feinleib, M. | NTRS | 1989


    Autometric gyro for satellite relativity experiments.

    Frisch, D. H. / Kasper, J. F., Jr. | NTRS | 1969


    A Novel Thin Film Dispenser Cathode for Thermionic Emission

    Zavadil, K. R. / King, D. B. / Ruffner, J. A. et al. | British Library Conference Proceedings | 2001


    Comparison of Broadband Gyro-TWA Simulations with Experiments

    Young, A. R. / Whyte, C. G. / Rafferty, E. G. et al. | IEEE | 2006