Pin-Hole Camera Investigation of Electron Beams
- 1 March 1955
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 43 (3), 299-306
- https://doi.org/10.1109/jrproc.1955.278135
Abstract
Electron beams produced b y low- and moderate-perveance Pierce-type electron guns have been investigated by means of a pin-hole aperture. Data are presented showing the current density distribution and transverse velocity distribution of electrons at various points in the beam. The thermal velocity distribution is Maxwellian, with a width corresponding to the cathode temperature modified by the geometry of the flow. The transverse velocity distribution also reveals aberrations in the electron gun which has led to improved gun designs and a large improvement in the focusing of electron beams. The theoretical background for this work is given in a companion paper.Keywords
This publication has 3 references indexed in Scilit:
- Thermal Velocity Effects in Electron GunsProceedings of the IRE, 1955
- Influence of space charge on thermionic emission velocitiesProceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences, 1947
- Rectilinear Electron Flow in BeamsJournal of Applied Physics, 1940