Confined Electron Flow in Periodic Electrostatic Fields of Very Short Periods
- 1 January 1957
- journal article
- Published by Institute of Electrical and Electronics Engineers (IEEE) in Proceedings of the IRE
- Vol. 45 (1) , 66-73
- https://doi.org/10.1109/JRPROC.1957.278300
Abstract
By utilizing the centrifugal force of an electron, resulting from a magnetic field in the cathode plane as a restoring force, an electrostatically-confined beam flow can be obtained through the strong focusing of a periodic electric field. Because of the extremely steep nature of the potential valley derived from its particular force field, the focusing scheme is far more stable than any previous ones. A uniform magnetic field threading the cathode is employed when a very thin, hollow beam is to be focused. By using a radially varying magnetic field, the focusing scheme can be applied to thick hollow beams, of low as well as of high perveance. Experimental results indicate that the focusing performance obtained is much less critical than that obtained with a periodic magnetic field which has been recently tested extensively.Keywords
This publication has 7 references indexed in Scilit:
- Beam Focusing by Periodic and Complementary FieldsProceedings of the IRE, 1955
- Focusing of a Long Cylindrical Electron Stream by Means of Periodic Electrostatic FieldsJournal of Applied Physics, 1954
- Electron Beam Focusing with Periodic Permanent Magnet FieldsProceedings of the IRE, 1954
- Focusing of an Electron Beam by Periodic FieldsJournal of Applied Physics, 1954
- Axially Symmetric Electron Beam and Magnetic-Field SystemsProceedings of the IRE, 1952
- The Formation and Maintenance of Electron and Ion BeamsJournal of Applied Physics, 1940
- Velocity-Modulated TubesProceedings of the IRE, 1939