Effect of Velocity Distribution on Traveling-Wave Tube Gain
- 1 November 1954
- journal article
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 25 (11) , 1375-1379
- https://doi.org/10.1063/1.1721570
Abstract
The density-function method is applied to the one-dimensional model of the traveling-wave tube to determine the effect of velocity distribution on traveling-wave tube performance. For narrow velocity spreads, a term is introduced into the root equation for the incremental propagation constants which is like the space charge term 4QC and directly added thereto. This term is proportional to the ratio of the variance of the distribution to the square of the gain parameter C. For a typical tube, thermal velocities are found to reduce the gain by less than one part in 104. In a tube employing confined magnetic focusing, and employing a high perveance beam, the velocity spread resulting from space charge lowers the gain by about 1 percent.This publication has 4 references indexed in Scilit:
- Helix Impedance Measurements Using an Electron BeamJournal of Applied Physics, 1953
- The Effect of Velocity Distribution in a Modulated Electron StreamJournal of Applied Physics, 1952
- Equivalent Temperature of an Electron BeamJournal of Applied Physics, 1951
- Effect of Hydrostatic Pressure in an Electron Beam on the Operation of Traveling-Wave DevicesJournal of Applied Physics, 1951