A diode design study of the virtual cathode oscillator with ring-type reflector

A numerical simulation study of the high power microwave generation from the virtual cathode oscillator (vircator) is carried out for various diode configurations by a 3 dimensional particle-in-cell (PIC) code called MAGIC. The coaxial vircator has a cylindrical cathode, cylindrical anode-mesh, and...

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Bibliographic Details
Published inDigest of Technical Papers. PPC-2003. 14th IEEE International Pulsed Power Conference (IEEE Cat. No.03CH37472) Vol. 2; pp. 1143 - 1146 Vol.2
Main Authors Wook Jeon, Kew Yong Sung, Yoon Jung, Jin Gi Kim, Eun Ha Choi
Format Conference Proceeding
LanguageEnglish
Published IEEE 2003
Subjects
Bandwidth
Cathodes
Coaxial components
Diodes
High power microwave generation
Microwave frequencies
Microwave oscillators
Numerical simulation
Power generation
Ring oscillators
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Summary:A numerical simulation study of the high power microwave generation from the virtual cathode oscillator (vircator) is carried out for various diode configurations by a 3 dimensional particle-in-cell (PIC) code called MAGIC. The coaxial vircator has a cylindrical cathode, cylindrical anode-mesh, and reflector, in order to enlarge the active interaction region in the virtual cathode space. The simulation results show that the output microwave frequency has a narrow bandwidth and its output microwave power depends sensitively on the position and width of ring-type reflector. The maximum microwave output power will be obtained by adopting a ring-type reflector 10 mm in width and 40 mm in downstream of cathode for intense relativistic electron beam. The output microwave mode without the ring-type reflector is mixture of TM and TE mode, however, it has been found to be dominantly to be TM/sub 01/ mode and its resonance frequency was 2.2 GHz under the ring-type reflector.
ISBN:0780379152
9780780379152
DOI:10.1109/PPC.2003.1278013