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Electromagnetic simulation of a 32-GHz, TE021 gyrotron

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3 Author(s)
Barroso, J.J. ; Associated Plasma Lab., Nat. Inst. for Space Res., Sao Jose dos Campos, SP, Brazil ; Kostov, K.G. ; Correa, R.A.

A simulation study with experimental parameters of a 32-GHz gyrotron operating in the TE021 mode is presented. Beam electrons with typical energy of 40 keV and transverse-to-axial velocity ratio ranging from α=0.8 to α=2.0 are injected into the cavity to drive electromagnetic oscillations from noise. On the basis of an electromagnetic particle-in-cell (PIC) code, a parameterization study is carried out to determine the dependence of output power upon pitch ratio and beam current. A comparison of the PIC simulation results with the predictions of the fixed-field approximation on considering Gaussian and asymmetric profiles has indicated close agreement between field parameters and conversion efficiency corresponding to both approaches

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Plasma Science, IEEE Transactions on  (Volume:27 ,  Issue: 2 )