Electron beam behavior in an axially-extracted virtual cathode oscillator

Journal Article · Sat Oct 01 00:00:00 EDT 1994 · IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/27.338311· OSTI ID:6625867

Yatsuzuka, Mitsuyasu; Nagakawa, Kenji; Hashimoto, Yoshiyuki; Nobuhara, Sadao ^[1]; Ishihara, Osamu ^[2]

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1. Himeji Inst. of Tech., Hyogo (Japan). Dept. of Electrical Engineering
2. Texas Tech Univ. Lubbock, TX (United States). Dept. of Electrical Engineering

High-power microwave generation in an axially-extracted virtual cathode oscillator has been studied experimentally. The microwave emission of 120 MW at frequencies in the range of 10--12 GHz is observed in the presence of annular electron beam operated at a 300 kV and 20 kA. The electron beam current in the diode region is well characterized by the electron space-charge-limited current in bipolar flow, which is well below the critical current defined for diode pinching. The observed microwave emission is accompanied by the strongly pinched electron beam. Essential feature of such a pinching effect for the microwave generation is confirmed by the absence of emission when the pinch of electron beam is suppressed by the application of the axial magnetic field.

• OSTI ID: 6625867
• Journal Information: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Transactions on Plasma Science (Institute of Electrical and Electronics Engineers); (United States) Vol. 22:5; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426000* -- Engineering-- Components
Electron Devices & Circuits-- (1990-)
DATA
DESIGN
DIAGNOSTIC TECHNIQUES
ELECTROMAGNETIC RADIATION
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
INFORMATION
MICROWAVE EQUIPMENT
MICROWAVE RADIATION
NUMERICAL DATA
OPERATION
PINCH EFFECT
RADIATIONS
SPACE CHARGE