MULTI-SUSPENDED GATE CATHODE STRUCTURE, ELECTRON GUN, ELECTRON ACCELERATOR, AND IRRADIATION DEVICE

摘要

The present invention relates to a multi-suspended gate cathode structure, an electron gun, an electron accelerator, and an irradiation device. The multi-suspended gate cathode structure comprises: a cathode used for emitting an electron beam; an emission suppression gate located at a side of an emitting surface of the cathode; a first suspended gate located at a side of the emission suppression gate that faces away from a cathode body, a first suspended gate cathode being provided at an edge of the first suspended gate, a first suspended gate anode being disposed at an interval from and opposite to the first suspended gate cathode, and the first suspended gate anode being connected to an external first bias power source; and a second suspended gate located at a side of the first suspended gate that faces away from the emission suppression gate, a second suspended gate cathode being provided at the edge of the second suspended gate, a second suspended gate anode being disposed at an interval from and opposite to the second suspended gate cathode, and the second suspended gate anode being connected to an external second bias power source.