Physics of Wave Phenomena

, Volume 19, Issue 1, pp 52–61 | Cite as

Numerical model of electron injector for a traveling-wave tube based on a coupled-cavity chain

Microwave Electronics


A 2.5D numerical model of electron injector has been developed taking into account the thermal-electron velocities at the cathode. Three modes of operation are considered for hot-cathode diodes: initial-current, space-charge-limited current, and emission-current-saturation modes. The simulation results are compared with the measured current-temperature and current-voltage characteristics of injector for a traveling-wave tube based on a coupled-cavity chain.


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  1. 1.
    A. E. Vasil’ev, V.V. Vetrov, V.M. Pikunov, and V. S. Smirnov, “On Consideration of Near-Cathode Phenomena in Calculations of Electron Injector for Traveling-Wave Tube,” Preprint No. 11, MGU (Lomonosov Moscow State Univ., Faculty of Physics, 2005).Google Scholar
  2. 2.
    V. Bursian, “Thermionic Current between Plane Electrodes in Vacuum,” Vestnik Rengenologii i Radiologii. 1(3), 1 (1919).Google Scholar
  3. 3.
    I. Langmuir, “The Effect of Space Charge and Initial Velocities on the Potential Distribution and Thermionic Current between Parallel Plane Electrodes,” Phys. Rev. 21, 419 (1923).ADSCrossRefGoogle Scholar
  4. 4.
    A. M. Filachev, S.V. Andreev, M.A. Monastyrskii, V. A. Tarasov, I. Sh. Beluga, I.S. Gaidukova, and A. G. Murav’ev, “Development on Computation Techniques and Applied Program Package for Electron Beam Technological Units Modeling,” Appl. Phys. No. 2, 5 (1998).Google Scholar
  5. 5.
    M. A. Monastyrskii, V. A. Tarasov, and A.G. Murav’ev, “Numerical Iterative Solution of the Self-Consistent Problem for Electron Guns in the Near-Cathode Region,” Appl. Phys. No. 2, 22 (1998).Google Scholar
  6. 6.
    I. I. Barbarich, A. N. Ivanov, and A. A. Titov, “Software Package for Calculating the Parameters of Axially Symmetric Electron-Optical Systems with Allowance for the Initial Velocities of Thermal Electrons and Space Charge,” in New Methods for Calculating Electron-Optical Systems (Nauka, Moscow, 1983), p. 28 [in Russian].Google Scholar
  7. 7.
    I. Sh. Beluga and I.M. Sokolova, “A Program for the Calculation of an Electron-Optic System Taking into Account Initial Velocities of Electrons,” Appl. Phys. Nos. 2–3, 88 (1997).Google Scholar
  8. 8.
    V. M. Pikunov, “Numerical Simulation of Electron Injector with Allowance for the Cathode Temperature,” in Lomonosov Readings, Section of Physics, April 2007 (MGU, Moscow, 2007), p. 132 [in Russian].Google Scholar
  9. 9.
    V.P. Il’in, Numerical Methods for Solving Problems of Electrophysics (Nauka, Moscow, 1985) [in Russian].Google Scholar
  10. 10.
    S. I. Molokovskii and A. D. Sushkov, Intense Electron and Ion Beams (Energoatomizdat, Moscow, 1991) [in Russian].Google Scholar
  11. 11.
    S. D. Gvozdover, Theory of Microwave Electron Devices (Gostekhizdat, Moscow, 1956) [in Russian].Google Scholar
  12. 12.
    L. N. Dobretsov and M. L. Gomoyunova, Emission Electronics (Nauka, Moscow, 1966) [in Russian].Google Scholar
  13. 13.
    G. Hall and J.M. Watt, Modern Numerical Methods for Ordinary Differential Equations (Clarendon, N.Y., 1979).MATHGoogle Scholar
  14. 14.
    O. Yu. Maslennikov and A. B. Ushakov, Handbook of Efficient Hot Cathodes (Design and Technology) (MFTI, Moscow, 2003), Pt. 2 [in Russian].Google Scholar

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© Allerton Press, Inc. 2011

Authors and Affiliations

  1. 1.Faculty of PhysicsMoscow State UniversityMoscowRussia

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