SUSPENDED GRID CATHODE STRUCTURE, ELECTRON GUN, ELECTRON ACCELERATOR AND IRRADIATION DEVICE

摘要

The present invention provides an improved suspended grid cathode structure that is better suited for application in an electron accelerator and an irradiation device. The suspended grid cathode structure comprises: a cathode body (10) for emitting an electron beam; a suppression emission grid (20') located at a side of an emission surface of the cathode body (10), wherein a predetermined gap (d) is provided between the suppression emission grid and the cathode body (10), and the suppression emission grid is electrically connected to a negative voltage end of a power source (U); and a suspended grid (30) located at a side of the suppression emission grid (20') away from the cathode body (10).