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A minigyrotron scheme controlled by a compact pulse magnet to excite broadband terahertz (THz) radiation is presented here. In comparison to an open-cavity circuit, the adopted prebunched backward-wave interaction circuit can expand tuning bandwidth tenfold under the control of time-varying magnetic field strength, which also significantly extends the available duration time of the pulse magnet for...
A high power Gyrotron Traveling-Wave Amplifier(Gyro-TWT) operating in the low-loss TE01 mode has been designed and demonstrated. The gyro-TWT consists of a double-anode magnetron injection gun(MIG), TE01 mode interaction circuit, a 36mm diameter collector, and a three disk sappire output window. A double-anode magnetron injection gun is designed to operate at 70 kV and 10A using the EGUN trajectory...
Loading a certain kind of the distributed loss technique to stabilize the linear stage of a gyrotron traveling-wave tube (gyro-TWT) forces a spurious mode to be confined in the nonlinear stage. This paper reports using a sharp down-tapered magnetic profile to further strengthen the unloaded nonlinear stage stability and to further enhance the system performance.
The design and experiment of a Ka-band Second-harmonic gyroklystron amplifier is presented. Three cavity 35 GHz second harmonic gyroklystron operate in the TE021 cylindrical mode. Initial experiments show a peak output power of 154 kW with a 3-dB bandwidth of 110 MHz (0.3%) .
A high power gyrotron traveling-wave amplifier operating in the low-loss TE01 mode has been designed. The amplifier will be driven by a 70-kV, 10-A electron beam with a pitch angle (vperp/v//)of unity and velocity spread of 3~5% generated by a double-anode magnetron injection gun (MIG).The amplifier is predicted by nonlinear theory simulation code to generated 180 kW at 35 GHz with 25 efficiency,...
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