Electron beam alternating rotation in periodic permanent magnet focusing field has an effect on parasitic backward-wave oscillation in helix traveling wave tube

We have verified experimentally the theoretical predictions of our previous work (Belyavskiy, E.D. et al., IEEE Trans. Electron Devices, vol.48, no.8, p.1727-36, 2001) about the effect of electron beam alternating rotation on the parasitic backward-wave oscillation in the amplifier-type helix travel...

Full description

Saved in:
Bibliographic Details
Main Authors: Belyavskiy, E.D., Chasnyk, V.I., Strokovsky, Y.N., Khotiaintsev, S.N.
Format: Conference Proceeding
Language:English
Subjects:
Circuit stability
Current measurement
Electron beams
Electron tubes
Length measurement
Magnetic flux
Magnetic shielding
Magnetosphere
Oscillators
Permanent magnets
Citations: Items that cite this one
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:We have verified experimentally the theoretical predictions of our previous work (Belyavskiy, E.D. et al., IEEE Trans. Electron Devices, vol.48, no.8, p.1727-36, 2001) about the effect of electron beam alternating rotation on the parasitic backward-wave oscillation in the amplifier-type helix traveling-wave tube (TWT) under periodic permanent magnetic (PPM) focusing. We measured the backward-wave start-oscillation current as a function of the interaction length in a specially designed helix backward wave oscillator. The observed behavior is much closer to the predictions of our theory, than to theories that ignore the electron beam rotation. Our results can be used for improving the stability of the PPM-focused helix TWT with respect to parasitic backward-wave oscillation.
DOI:10.1109/DIPED.2004.242809