Simulation of Klystrons With Slow and Reflected Electrons Using Large-Signal Code TESLA

Simulation of Klystrons With Slow and Reflected Electrons Using Large-Signal Code TESLA

The problem of modeling slow and reflected electrons that appear during operation of high-power klystrons is discussed. These electrons are not only problematic for the operation of real klystrons but also present a numerical challenge for simulation codes that solve the equations of motion with axi...

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Veröffentlicht in:IEEE transactions on electron devices 2007-06, Vol.54 (6), p.1555-1561
Hauptverfasser: Chernyavskiy, I.A., Vlasov, A.N., Antonsen, T.M., Cooke, S.J., Levush, B., Nguyen, K.T.
Format: Artikel
Sprache:eng
Schlagworte:
Algorithms
Applied sciences
Cavity resonators
Computer simulation
Devices
Electronic tubes, masers
Electronics
Equations
Equations of motion
Exact sciences and technology
Klystrons
large-signal code TESLA
Magnetic fields
Mathematical model
Mathematical models
Numerical models
slow and reflected particles
Thresholds
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Beschreibung
Zusammenfassung:The problem of modeling slow and reflected electrons that appear during operation of high-power klystrons is discussed. These electrons are not only problematic for the operation of real klystrons but also present a numerical challenge for simulation codes that solve the equations of motion with axial distance rather than time as the independent parameter. To meet this challenge, particles with axial velocity below some threshold are treated using an alternative algorithm. This approach has been implemented in the simulation code TESLA. The method is verified by comparison with PIC simulation. The effect of these particles on the efficiency of a hypothetical device is also presented.
ISSN:0018-9383
1557-9646
DOI:10.1109/TED.2007.896697