Propagation in Periodic Electron Beams
Journal Article
·
· Journal of Applied Physics
A small-signal analysis of smooth electron beams with periodic variations in their d-c parameters reveals the existence of infinite sets of space harmonics of the fast and slow space-charge waves. For a finite beam coupling between the space-charge waves and field waves exists at an infinite number of frequencies. The periodicity of a beam has a very small effect on the space-charge wave propagation constants. Velocity -jump, rippled-stream, and rippled-wall amplification are shown to result from coupling between fast and slow space-charge waves of adjacent harmonics. The periodicity of an electron beam will have negligible effect on most conventional traveling-wave devices. Although the frequency dependence of the amplitudes of the beam harmonics may introduce difficulties in some devices, this dependency may also be made use of in a negligible effect on most conventional traveling-wave devices. Although the frequency dependence of the amplitudes of the beam harmonics may introduce difficulties in some devices, this dependency may also be made use of in a variety of ways. Beam harmonics make millimeter-wave interactions possible in smooth circuits, but practical devices at these frequencies will probably be limtited to those employing positional periodicity of the beam. (auth)
- Research Organization:
- Hughes Aircraft Co., Los Angeles
- Sponsoring Organization:
- USDOE
- NSA Number:
- NSA-15-025321
- OSTI ID:
- 4018291
- Journal Information:
- Journal of Applied Physics, Journal Name: Journal of Applied Physics Journal Issue: 7 Vol. 32; ISSN JAPIAU; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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