The outputs (cw operation, f=301 GHz, P/spl sim/20W) of the Gyrotron FU IV are stabilized up to /spl Delta/P/P/spl sim/1% and /spl Delta/f/spl sim/50 kHz by decreasing the fluctuations of the cathode voltage and the anode voltage (/spl Delta/V/sub k/ /spl sim/ 0.6V, /spl Delta/V/sub a/ /spl sim/ 0.2 V), via introducing smoothing circuits consisting of resistors, induction coils and capacitors. Further stabilization of output frequency (/spl Delta/f< 1 kHz, /spl Delta/f/f<3/spl times/10/sup -9/) is attained by applying phase lock control. A carefully designed cavity resonator with nonlinear up-taper has been developed and implemented in Gyrotron FU VA. The measurements of the radiation patterns have confirmed high-purity mode operations. The output radiation of TE/sub 03/ and TE/sub 13/ modes are converted into bi-Gaussian beams by a quasioptical system.


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    Titel :

    High quality operation of a submillimeter wave gyrotron


    Beteiligte:
    Ogawa, I. (Autor:in) / Idehara, T. (Autor:in) / Hoshizuki, H. (Autor:in) / Myodo, M. (Autor:in) / Nagao, K. (Autor:in) / Mitsudo, S. (Autor:in) / Hori, T. (Autor:in)


    Erscheinungsdatum :

    2005-01-01


    Format / Umfang :

    896870 byte




    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



    WA4-1 High Quality Operation of a Submillimeter Wave Gyrotron

    Ogawa, I. / Idehara, T. / Hoshizuki, H. et al. | British Library Conference Proceedings | 2005


    CW Operation of a Submillimeter Wave Gyrotron (Gyrotron FU IV) for High Stability of the Output Frequency

    Idehara, T. / Yoshida, K. / Nishida, N. et al. | British Library Online Contents | 1998


    Amplitude Modulation of Submillimeter Wave Gyrotron Output

    Idehara, T. / Shimizu, Y. / Makino, S. et al. | British Library Online Contents | 1997


    Frequency Measurement of a Submillimeter Wave Gyrotron Output

    Idehara, T. / Yamagishi, Y. / Tatsukawa, T. | British Library Online Contents | 1997


    Mode Cooperation in a Submillimeter Wave FU Series Gyrotron

    Idehara, T. / Mitsudo, S. / Pereyaslavets, M. et al. | British Library Online Contents | 1999