In this paper,based on the basic theory of eiecuic-magnetic fieldand computer technique ,are analyzed the vacuum electronic device field andfocusing features,and given the equation of electric line of force and the simulated result by computer.
The vacuum electronic device is an active component in which the signal can be amplified and transformed by the electron or the ion transferring from a electrode to the other one in the vacuum or gas medium. It is the one of the most important electronic devices used by the contemporary national defense equipment and national economy interrelated department.
The interaction between electron beam and high-frequency electromagnetic field directly determines electron efficiency and operation performance of the vacuum electron device, so the study of the beam-wave interaction is currently one of the most extensive projects and also the most important content of the device research.
The discharge of mercury arc is electric discharge phenomena of low pressure gas and the current density is great. A vacuum electron device made by the discharging currnt,that is,ignitron,has the features of resistance to high pressure, high power and fast current rise.