Numerical simulation of electron beam transport in magnetosensitive vacuum microcell

A cylindrical multielectrode vacuum microcell with a circular emitter and a split plate anode is suggested as a field emitter array magnetosensitive element. Circular grid electrodes to control the electron beam and a plate target electrode serving as secondary electron emission source are included in the model. Electron beam transport in the self-consistent electric field and in an external magnetic field has been simulated using the cylindrical particle mesh code with Monte Carlo procedure. The split-anode difference current dependence on the intensity of a magnetic field parallel to the cell axis is discovered. Static characteristics and dynamic response of the element are calculated. The influence of the secondary electron emission is studied. The results enable to optimise the cell structure for the maximum magnetosensitivity