TY - GEN
T1 - Experimental studies on cathode material dependence of mirowave power in axially-extracted vircator with resonance cavity
AU - Teramae, M.
AU - Niwa, F.
AU - Nakamura, T.
AU - Ito, H.
N1 - Publisher Copyright:
© 2017 IEEE.
PY - 2017/7/2
Y1 - 2017/7/2
N2 - The high power microwave generated in an axially extracted virtual cathode oscillator (vircator) has been studied experimentally. The vircator is driven by a Marx generator and pulse forming line. To improve the efficiency, we installed a cavity in the vircator, since the narrowing of the output microwave frequency leads to the improvement of the efficiency. The electron beam diode consists of the solid type cathode of 60 mm in diameter and the stainless steel meshed anode. The disc resonator with an extraction window was placed at the distance away from an anode with anode-cathode gap of 8 mm. The effect of the cavity on the characteristics of emitted microwave was investigated by varying the length and the aperture of cavity. The microwave power was evaluated for three different cathode materials (aluminum, graphite and polymer velvet), since the characteristics of the microwaves depend sensitively on the electrode material. The output power of the microwave increased by 15% to 80 MW by installing the cavity in the vircator, where the diode voltage and diode current are 280 kV and 12 kA, respectively. In addition, we evaluate the characteristics of output microwave with the resonator by analysis of the time-dependent frequency analysis.
AB - The high power microwave generated in an axially extracted virtual cathode oscillator (vircator) has been studied experimentally. The vircator is driven by a Marx generator and pulse forming line. To improve the efficiency, we installed a cavity in the vircator, since the narrowing of the output microwave frequency leads to the improvement of the efficiency. The electron beam diode consists of the solid type cathode of 60 mm in diameter and the stainless steel meshed anode. The disc resonator with an extraction window was placed at the distance away from an anode with anode-cathode gap of 8 mm. The effect of the cavity on the characteristics of emitted microwave was investigated by varying the length and the aperture of cavity. The microwave power was evaluated for three different cathode materials (aluminum, graphite and polymer velvet), since the characteristics of the microwaves depend sensitively on the electrode material. The output power of the microwave increased by 15% to 80 MW by installing the cavity in the vircator, where the diode voltage and diode current are 280 kV and 12 kA, respectively. In addition, we evaluate the characteristics of output microwave with the resonator by analysis of the time-dependent frequency analysis.
UR - http://www.scopus.com/inward/record.url?scp=85054233762&partnerID=8YFLogxK
U2 - 10.1109/PPC.2017.8291254
DO - 10.1109/PPC.2017.8291254
M3 - 会議への寄与
AN - SCOPUS:85054233762
SN - 9781509057481
T3 - IEEE International Pulsed Power Conference
BT - 2017 IEEE 21st International Conference on Pulsed Power, PPC 2017
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 21st IEEE International Conference on Pulsed Power, PPC 2017
Y2 - 18 June 2017 through 22 June 2017
ER -