DEVELOPMENT OF ELECTRON GUN WITH NON-INTERCEPTING GRIDS.
Abstract
Equipotential lines for the region near the cathode of the 0.570-inch spherical radius cathode were obtained from a computer study. Electron trajectories from cathode through the anode were similarly obtained and shown to be satisfactory. A pair of aligned grids shaped to approximate the equipotential defined by the computer study were made. The shape produced was spherical with the size chosen to fit the equipotential line best out near the edge of the cathode. The two grids were separated beyond their concentric position to further improve grid wire alignment with respect to electron trajectories. This pair of grids was shown to operate as a nonintercepting grid under certain conditions when the gun in which they were installed was tested in a beammm tester. Computer analysis was also applied to the gun used on a 10 kw traveling-wave tube. Electron trajectories on this 0.460-in. diameter cathode gun were comparable to those on the 1-in. diameter 0.570-in. spherical radius cathode gun. Equipotential lines near the cathode followed a spherical pattern much more closely than for the larger gun. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 28, 1964
- Accession Number
- AD0456787
Entities
People
- Joseph Drees
- Marshall Mcdonald