Autoacceleration of Intense Electron Beams by Coaxial Cavity Structures.
Abstract
Tonk's theorem and Faraday's law are applied to study the autoacceleration interaction of an intense hollow beam with a coaxial transmission line cavity, assuming the constant-current approximation. The autoacceleration voltage is found proportional to the beam current and the inductance per unit length of the coaxial transmission line. Comparison with experimental data indicates that the coupling coefficient alpha is of the order 1/2. The creation of a virtual cathode near the autoacceleration region under certain beam and geometry conditions gives rise to a virtual cathode acceleration voltage. This voltage is found to be proportional to the inductance per unit length of the annular region between the hollow beam and the drift tube as well as the amount of charge per unit length reflected from the virtual cathode.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1975
- Accession Number
- ADA015307
Entities
People
- John G. Siambis
Organizations
- United States Naval Research Laboratory