Radial acceletron, a new low-impedance HPM source

Journal Article · Sat Jun 01 04:00:00 EDT 1996 · IEEE Transactions on Plasma Science

DOI:https://doi.org/10.1109/27.533102· OSTI ID:377859

Arman, M J ^[1]

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1. Phillips Lab., Kirtland AFB, NM (United States)

The transit-time effect in a coaxial structure was explored to develop a low-impedance high-power microwave (HPM) source that uses no external magnetic field and no confining foils. This source will work in the 1--20 GHz range and will have a power output of no less than 1 GW. The input will be a low-voltage dc pulse of only 350 kV or less with a flat top of approximately 200 ns. The dc pulse is launched into a coaxial structure that is the diode, the oscillator, and the buncher all in one. The source offers significant improvements in power, repetition rate, size, and efficiency. Because of the coaxial structure, the diode impedance may be reduced to a few ohms thus allowing larger input and output powers. With no foils to erode, the only factor limiting the repetition rate is the ability to maintain an adequate vacuum, and since there is no external magnetic field required, the device is simple, lightweight, and inexpensive. Because of the strong bunching, the efficiency is high. As is the case will all transit-time oscillators, the signal is stable and monochromatic. The device may be used as a buncher or as an oscillator. It is shown that a device based on this concept is indeed possible. In addition, it is shown that the gated emission of electrons, a process basic to high-power RF amplification, is a natural by-product of the mechanism used in this device.

• OSTI ID: 377859
• Journal Information: IEEE Transactions on Plasma Science, Journal Name: IEEE Transactions on Plasma Science Journal Issue: 3 Vol. 24; ISSN ITPSBD; ISSN 0093-3813
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
BEAM BUNCHING
BEAM CURRENTS
DESIGN
ELECTRIC POTENTIAL
MICROWAVE EQUIPMENT
NUMERICAL ANALYSIS
THEORETICAL DATA