| 3M™ Hollow Cathodes typically consist of a porous tungsten matrix impregnated with a barium based emission enhancing material. Depending on the application, the hollow insert may include a highreliability potted heater assembly and additional support structures. Hollow cathodes are used in space-qualified applications, from low earth orbit programs to deep space exploration. Applications include ion sources, electric propulsion, plasma contactors and spacecraft neutralization. These devices are mission critical and are constructed using the same quality systems that are used for the manufacture of space-qualified microwave cathodes. Hollow cathode assemblies are built under strict materials and process control, with documentation and test data available as required.Information provided by 3M™ |
