COMPUTER SIMULATION OF SPACE-CHARGE FLOWS.
MICHIGAN UNIV ANN ARBOR ELECTRON PHYSICS LAB
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Digital computer programs for the accurate determination of space-charge flows have been developed and are described for several types of electron gun configurations. The effects of space-charge and applied magnetic fields are taken into account and relativistic effects can be included. Direct particle-particle interaction effects are ignored, although d-c thermal effects are given a brief treatment. The computer programs are written in the IBM-7090 FORTRAN programming language and require from four to 15 minutes to execute on an IBM-7090 digital computer. Individual sections of the programs, e.g., trajectory calculations, field evaluations, etc., are shown to be generally within 0.1 percent of theoretical predictions. The overall results are generally within four percent of either theory or experiment. The electrostatic and magnetic convergence and focusing of axially symmetric beams are discussed in detail. A program for the analysis of magnetron injection guns is also described. The importance of cathode edge effects is shown for a crossed electric and magnetic field electron gun configuration. Author
- Electrical and Electronic Equipment
- Computer Programming and Software
- Electricity and Magnetism