STUDY OF ELECTRON FOCUSING BY NON-LINEAR SPIRALS
Abstract
The problem of a plane-to-plane electrostatic image-tube was attacked by theoretical, as well as by experimental, methods. Large spiral-lens cylinders were designed and built to handle focusing and accelerator functions involved. High transmission meshes, both flat and spherical, were prepared for use in test tubes. Raytracing studies revealed that an internal convex mesh-anode can produce a convex virtual-image surface from a flat cathode-plane, under certain conditions. Tubes built on that basis showed definite effects from the convex versus the concave shape of the mesh. These effects, however, were too weak to be usable. A triode system, using a strongly convex mesh of conchoidal shape, facing a plane cathode behind a flat first anode mesh, was giving good results. The theory of this aplanatic system, along with some pictorial evidence, is given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jun 30, 1962
- Accession Number
- AD0278094
Entities
People
- Kurt Schlesinger
Organizations
- General Electric