Title :
Slotted third-harmonic gyro-TWT
Author :
Chong, Chae K. ; McDermott, D.B. ; Luhmann, N.C.
Author_Institution :
Dept. of Appl. Sci., California Univ., Davis, CA, USA
Abstract :
Summary form only given. A low magnetic field, low voltage gyro-TWT has been designed in collaboration with CPI/Varian for operation at 95 GHz and tested in a scaled experiment at 10 GHz. A slotted interaction circuit is utilized to achieve strong interaction at the third harmonic. Analytical theory was used to check for oscillation from gyro-BWO and the absolute instability. A self-consistent slow-timescale simulation code predicts the three-section, slotted third-harmonic gyro-TWT, which utilizes a 11.6 kG magnet and a 50 kV, 3 A, v/sub /spl perp//v/sub z/=1.4, axis-encircling electron beam with an axial velocity spread of 6%, which yields an output power of 30 kW with an efficiency of 20%, a saturated gain of 40 dB and a constant-drive bandwidth of 2%.
Keywords :
backward wave oscillators; electron beam testing; gyrotrons; harmonic generation; microwave amplifiers; microwave generation; millimetre wave amplifiers; millimetre wave generation; simulation; travelling wave amplifiers; 10 GHz; 11.6 kG; 20 percent; 3 A; 30 kW; 40 dB; 50 kV; 95 GHz; CPI/Varian; absolute instability; axial velocity spread; axis-encircling electron beam; constant-drive bandwidth; efficiency; gyro-BWO; low voltage gyro-TWT; oscillation; output power; saturated gain; scaled experiment; self-consistent slow-timescale simulation code; slotted interaction circuit; slotted third-harmonic gyro-TWT; third harmonic; Circuit simulation; Circuit testing; Collaboration; Electron beams; Low voltage; Magnetic analysis; Magnetic fields; Power generation; Predictive models; Saturation magnetization;
Conference_Titel :
Plasma Science, 1997. IEEE Conference Record - Abstracts., 1997 IEEE International Conference on
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-3990-8
DOI :
10.1109/PLASMA.1997.604919
