• DocumentCode
    1012235
  • Title

    Effect of electron lenses on beam noise

  • Author

    Knechtli, R.C.

  • Author_Institution
    Hughes Aircraft Co., Culver City, Calif.
  • Volume
    5
  • Issue
    2
  • fYear
    1958
  • fDate
    4/1/1958 12:00:00 AM
  • Firstpage
    84
  • Lastpage
    88
  • Abstract
    Some types or electron guns used to form the beam of a low-noise beam type microwave amplifier (e.g. traveling-wave tube) impress sharp potential discontinuities or velocity jumps on this beam. These discontinuities produce strong electrostatic lenses. This paper presents a theory supported by experimental results, showing that the effect of such lenses is to increase the beam noise. Further, axial magnetic fields are shown to reduce this undesirable effect.
  • Keywords
    Bibliographies; Electron beams; Electron devices; Electron guns; Equations; Fluctuations; Lenses; Low-noise amplifiers; Magnetrons; Microwave amplifiers; Noise figure; Physics; Space charge;
  • fLanguage
    English
  • Journal_Title
    Electron Devices, IRE Transactions on
  • Publisher
    ieee
  • ISSN
    0096-2430
  • Type

    jour

  • DOI
    10.1109/T-ED.1958.14337
  • Filename
    1472380
    • Link To Document
    https://search.isc.ac/dl/search/defaultta.aspx?DTC=49&DC=1012235