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Theoretical investigation of a high efficiency and broadband subterahertz gyrotron

2010; American Institute of Physics; Volume: 96; Issue: 16 Linguagem: Inglês

10.1063/1.3400216

1520-8842

Nai-Ching Chen, Tsun‐Hsu Chang, Ching-Pin Yuan, T. Idehara, I. Ogawa,

Insects and Parasite Interactions

This study investigates the electron dynamics of gyrotron interaction in a tapered waveguide and proposes an interaction structure for a 0.2 THz TE02 reflective gyrotron backward-wave oscillator (gyro-BWO). The design shows the advantages of high power, continuous, and broadband frequency tuning, mode converter free, and inherently possesses mode-selective ability to suppress the potentially competing TE22 mode. Calculated results indicate that the reflective TE02 gyro-BWO is capable of generating a peak power of 3.3 kW corresponding to 26.3% interacting efficiency with a broad 3dB tuning bandwidth of 6.9 GHz at beam current Ib=0.5 A and beam voltage Vb=25 kV.