Trajectory of a boundary electron in the transition region between a slow-wave structure and a collector
Abstract
The boundary-electron trajectory between the slow-wave structure and the collector of a traveling wave tube is analyzed theoretically in connection with increases of electron-beam radius as a function of the width of the collector transition region, the electron injection angle, and the initial beam diameter. It is shown that the relative increase in the maximum beam diameter beyond the gap amounts to less than 2.5 percent for a four-fold change in the gap width. Under certain conditions, the change in collector potential beyond the gap produces a parallel shift in the boundary-electron trajectory. It is concluded that the results obtained can be used to calculate the dimensions of the transition region and to analyze the causes of current redistribution between the slow-wave structure and the first stage of the collector.
- Publication:
-
Radioehlektronika
- Pub Date:
- November 1986
- Bibcode:
- 1986Radel..29...89S
- Keywords:
-
- Delay Lines;
- Electron Beams;
- Electron Trajectories;
- Traveling Wave Tubes;
- Accumulators;
- Current Distribution;
- Electronics and Electrical Engineering