EUGM 2017: Design of electron beam guns using evolutionary algorithms and finite element modelling
Published on 13 Mar 2017
Presenter: Colin Ribton, TWI
Electron beams are used in many different industrial, medical and scientific applications. Each area has many specific requirements that can only be met with bespoke gun designs producing beams with the required intensity, brightness and divergence for the application. Usually, tentative electron gun designs are produced, simulated using modelling software and then the resultant beam is analysed in comparison to the requirements. The designer continues with this trial and error approach until a satisfactory design is derived. This is labour intensive and may not produce an optimum design. This presentation describes the development of algorithms to automatically derive an optimum gun design. The method uses Opera in combination with a genetic algorithm, where the gun FE model is described by a genetic code. Evolutionary processes are then applied to a population of gun designs, and after several generations near optimum designs are evolved. This offers a rapid method of developing custom gun designs and allows radical design approaches to be examined.