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The gyrotron consists of a 20 T superconducting magnet, a demountable gyrotron tube, a triode-type magnetron injection gun, and a sapphire output window. Additional coils are installed surrounding the electron gun centered at the emitter to adjust the beam radius and beam quality at the cavity region. The operation conditions of the cavity modes at second harmonic were investigated through the numerical...
The experimental tests of a gyrotron using a 21 T pulse magnet have achieved 1 THz at second harmonic operation. The operation conditions of the gyrotron at the THz regime are investigated. The single mode operation at second harmonic and frequency of 1 THz has been clarified with the theoretical results. This achievement and understanding of operating condition of gyrotron at 1 THz will be useful...
A gyrotron with a 21 T pulse magnet achieved the breakthrough of 1 THz. This is the first result of high frequency operation in the world beyond 1 THz. In addition, new gyrotron series in FIR FU, University of Fukui, so-called Gyrotron FU CW Series is being developed. Such a present status of high frequency gyrotron in FIR FU will be introduced.
For application of high frequency gyrotrons to high power THz technologies, we are developing THz CW gyrotron, FU CW Series. Gyrotron FU CW I with 12 T liquid He free superconducting magnert has already been developed applied for material processing, for example, ceramics sintering. The second gyrotron of the series, Gyrotron FU CW II with an 8 T superconducting magnet has been constructed and the...
Simulation results of a CW 1 THz gyrotron operates at second harmonic are described. Gyrotron utilize a newly obtained 20 T superconducting magnet. Mode competition analysis is employed to investigate operation conditions for excitation of the second harmonic cavity modes in a single mode operation. Simulation results shows frequency tunability of 22.9 percent with frequency ranging from 781.6 to...
A gyrotron with a 21 T pulse magnet achieved the breakthrough of 1 THz. This is the first result of high frequency operation in the world beyond 1 THz. In addition, new gyrotron series in FIR FU, University of Fukui, so-called gyrotron FU CW series is being developed. Such a present status of high frequency gyrotron in FIR FU will be introduced.
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