Improved Electron Emission by Use of a Cloth Fiber Cathode.
MISSION RESEARCH CORP ALBUQUERQUE NM
Pagination or Media Count:
Intense electron beams are usually produced by applying a strong electric field 400 kVcm to the surface of a suitable material. In a number of applications of intense, pulsed beams, such as Free Electron Lasers, microwave generation and collective ion acceleration, good uniformity is desirable. In addition, there are many applications such as laser pumping and microwave generation where it is useful to produce pulsed electron beams at relatively low potentials 20-50 kV and high currents .2-10 kA. This document presents data which demonstrates that cloth fiber cathodes can have superior properties as cold cathode emitters. The specific material used is a 12cm x 12cm array of tufts, each composed of approximately 40, 75 rayon, 25 silk, 10-20 micron diameter, 1 mm long fibers. Each fiber is oriented approximately perpendicular to the cloth substrate. The substrate is, in turn, attached to a stainless steel base using a thin layer of epoxy. This material is easily obtained at any cloth store at a nominal cost.
- Electrical and Electronic Equipment
- Nuclear Physics and Elementary Particle Physics