Accession Number:

AD0252239

Title:

A STUDY OF SELF-ACTUATED TRANSIENTS IN HIGHPERVEANCE PLANAR ELECTRON TUBES

Descriptive Note:

Corporate Author:

COLORADO UNIV AT BOULDER ENGINEERING EXPERIMENT STATION

Personal Author(s):

Report Date:

1960-12-01

Pagination or Media Count:

1.0

Abstract:

An analytical study is made of certain behavior occurring in a short-circuited infinite planar diode when the velocity of convection current injected through one plane is adjusted to give, in turn, each of the two critical values of perveance possible. It is found that the higher critical perveance value leads to instability in the form of an oscillation whose frequency is two times the plasma frequency calculated on the basis of charge density at the entrance plane. That this is not just ringing resulting from an initial transient impulse in a lossless system is demonstrated by reinitiating the problem routine with initial conditions corresponding to the alternate and in past conjectures, stable static solution. So long as perveance is unchanged, steady-state oscillation at this same frequency develops regardless of initial conditions of charge displacement and velocity within the space. An extension of this problem is presented, in which the effects of electrons returned to the gun region are acknowledged. Quantitative results are highly dependent upon the capture cross-section of the grid. Author

Subject Categories:

Distribution Statement:

APPROVED FOR PUBLIC RELEASE