Magnetic focusing of electron beams in the presence of transverse velocity components
- 1 May 1981
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in IEEE Transactions on Electron Devices
- Vol. 28 (5) , 473-482
- https://doi.org/10.1109/t-ed.1981.20369
Abstract
The behavior of nonlaminar electron beams having an originally Gaussian current density distribution in a uniform magnetic field is studied by analytical and numerical methods. The effects of transverse velocity components vTin the beam are described by a fictitious, equivalent perveance which is proportional to the square of\bar{v}_{T}, the rms value of vT. Simple expressions are given for the magnetic field required to achieve a certain beam transmission through a tunnel of given diameter, and for the optimum beam filling factor. In the Appendix a simple experimental method for the determination of\bar{v}_{T}is descried.Keywords
This publication has 0 references indexed in Scilit: