Numerical simulations of the reditron
The reflected electron discrimination tube (reditron) is a high-power, narrow-band, and single-mode microwave generator which makes exclusive use of the oscillatory character of the virtual cathode of a relativistic electron beam. In a basic virtual-cathode configuration, there are two competing mechanisms generating microwaves, namely, the oscillating virtual cathode and the reflexing electrons between the real and virtual cathodes. Furthermore, they tend to interfere destructively with each other. Specifically, the reflexing electrons can cause considerable heating of the electron beam via two-stream instability and fluctuations of the diode impedance resulting in oscillations of the electron beam energy. The authors demonstrated theoretically a concept which was subsequently proven experimentally to effectively remove these undesirable effects. In addition, they found that high-power, narrow-band, and monochromatic microwaves could be generated with efficiency of 10 to 20 percent by the reditron. They also found that further optimization could be achieved by the use of a density (current) modulated electron beam at appropriate frequencies.
- Research Organization:
- Los Alamos National Lab., Los Alamos, NM (US)
- OSTI ID:
- 6844868
- Journal Information:
- IEEE Trans. Plasma Sci.; (United States), Journal Name: IEEE Trans. Plasma Sci.; (United States) Vol. 16:2; ISSN ITPSB
- Country of Publication:
- United States
- Language:
- English
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BEAMS
CATHODES
DATA
ELECTRODES
ELECTRON BEAMS
ELECTRON TUBES
ELECTRONIC EQUIPMENT
EQUIPMENT
EXPERIMENTAL DATA
FLUCTUATIONS
FUNCTION GENERATORS
HEATING
HIGH-VOLTAGE PULSE GENERATORS
IMPEDANCE
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INSTABILITY
LEPTON BEAMS
MICROWAVE EQUIPMENT
MICROWAVE TUBES
MONOCHROMATORS
NUMERICAL DATA
NUMERICAL SOLUTION
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PARTICLE BEAMS
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PLASMA MICROINSTABILITIES
PULSE GENERATORS
RELATIVISTIC PLASMA
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TWO-STREAM INSTABILITY
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