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Electron Beam Emission and Interaction in 0.3-THz Gyrotron for Second Harmonic, CW Operation

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6 Author(s)
Singh, U. ; Central Electron. Eng. Res. Inst., Pilani, India ; Kumar, N. ; Kumar, A. ; Yadav, V.
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This paper describes the design of a 0.3-THz gyrotron at second harmonic operation. The interaction cavity design and the beam-wave interaction computation are carried out for TE0,6 mode by using the particle-in-cell electromagnetic simulation approach. The simulation results confirm > 6-kW output power with efficiency ~ 17% by using an electron beam with accelerating voltage 20 kV and current 2.0 A. To achieve the required electron beam parameters, a triode magnetron injection gun is designed. The transverse-to-axial velocity ratio (α), 1.27 and the transverse velocity spread <; 4% are realized. Considering the fabrication and operation of the device, the parametric analysis is also performed.

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Plasma Science, IEEE Transactions on  (Volume:41 ,  Issue: 4 )