Higher Order Mode Radiations of Weakly Relativistic Oversized Backward Wave Oscillator Higher Order Mode Radiations of Weakly Relativistic Oversized Backward Wave Oscillator

Access this Article

Search this Article

Author(s)

Abstract

Higher order mode radiations of oversized K-band backward wave oscillator (BWO) are examined experimentally. By injecting an annular beam in the weakly relativistic region less than 100 kV, a beam mode with harmonic number <i>n </i>= 1 excites BWO radiations based on the TM<sub>01 </sub>surface wave. The same beam mode excites higher order modes leading to radiations in the U- and E-bands. The power levels of the higher order modes are hundreds of times smaller than that of BWO due to the surface wave. For a beam mode with <i>n </i>= 2, higher order mode radiations are in the F- and D-bands, up to about 100 GHz, which is about four times higher than the frequency of the TM<sub>01 </sub>surface wave. The power level of higher order mode radiation by the <i>n </i>= 2 beam mode decreases by a factor of hundreds from that of the <i>n </i>= 1 beam mode.

Journal

  • Plasma and Fusion Research

    Plasma and Fusion Research 8(0), 2401085-2401085, 2013

    Japan Society of Plasma Science and Nuclear Fusion Research

Codes

  • NII Article ID (NAID)
    130004678513
  • NII NACSIS-CAT ID (NCID)
    AA12346675
  • Text Lang
    ENG
  • Article Type
    journal article
  • ISSN
    1880-6821
  • Data Source
    IR  J-STAGE 
Page Top