Dispenser cathode structure for use in electron gun.

摘要

A dispenser cathode for an electron gun comprising a reservoir (2) for thermoelectron emissive material (1) and a sleeve (3) which has an outward flange at the top thereof and receives the reservoir within its upper portion. A heat shielding tube (5) has an inward flange at the top thereof which corresponds to and overlaps with the flange of the sleeve (3) and is welded thereto. A holder supports the heat shielding tube. <IMAGE>