Add to ORKGThe technology of impregnated materials is described and some inherently advantageous characteristics of impregnated cathodes are discussed. Thermionic emission measurements are presented for oxide coated and impregnated cathodes. Five cathode configurations with barium oxide impregnated porous tungsten inserts and/or tips have been fabricated and tested. Reliability, durability, and stability of operation are characterized. One of the cathodes has accumulated over 9000 operational hours, another has been cycled on and off more than 800 times
Cathode tips made from a number of different materials were tested in a modular arcjet thruster in o...
Magnetoplasmadynamic (MPD) thrusters have demonstrated performance and power handling capabilities w...
An interest in alternate propellants for ion-bombardment thrusters, together with ground application...
The surface properties of conventional impregnated cathodes were investigated by the use of Auger sp...
The effect of tungsten erosion, transport, and redeposition on the operation of dispenser hollow cat...
An experimental investigation of hollow cathodes for 30-cm Hg bombardment thrusters was carried out....
Four hollow cathode electron sources were analyzed via boroscopy, scanning electron microscopy, ener...
Electric thrusters use hollow cathodes as the electron source for generating the plasma discharge an...
Dispenser hollow cathodes rely on a consumable supply of Ba released by BaO-CaO-Al_2O_3 source mater...
A model for the insert chemistry developed by the authors and based on the knowledge of the BaO – Ca...
This thesis work deals with theoretical and experimental studies carried out at Alta-Centrospazio on...
The research presented here is an effort to integrate an existing hollow cathode design with a low p...
An update on the life testing of commerical, high current density impregnated tungsten cathodes is p...
Performance of four hollow cathode configurations with low work function inserts was evaluated in a ...
Reservoir-type dispenser hollow cathodes are currently being developed for use on NASAs Prometheus 1...
Cathode tips made from a number of different materials were tested in a modular arcjet thruster in o...
Magnetoplasmadynamic (MPD) thrusters have demonstrated performance and power handling capabilities w...
An interest in alternate propellants for ion-bombardment thrusters, together with ground application...
The surface properties of conventional impregnated cathodes were investigated by the use of Auger sp...
The effect of tungsten erosion, transport, and redeposition on the operation of dispenser hollow cat...
An experimental investigation of hollow cathodes for 30-cm Hg bombardment thrusters was carried out....
Four hollow cathode electron sources were analyzed via boroscopy, scanning electron microscopy, ener...
Electric thrusters use hollow cathodes as the electron source for generating the plasma discharge an...
Dispenser hollow cathodes rely on a consumable supply of Ba released by BaO-CaO-Al_2O_3 source mater...
A model for the insert chemistry developed by the authors and based on the knowledge of the BaO – Ca...
This thesis work deals with theoretical and experimental studies carried out at Alta-Centrospazio on...
The research presented here is an effort to integrate an existing hollow cathode design with a low p...
An update on the life testing of commerical, high current density impregnated tungsten cathodes is p...
Performance of four hollow cathode configurations with low work function inserts was evaluated in a ...
Reservoir-type dispenser hollow cathodes are currently being developed for use on NASAs Prometheus 1...
Cathode tips made from a number of different materials were tested in a modular arcjet thruster in o...
Magnetoplasmadynamic (MPD) thrusters have demonstrated performance and power handling capabilities w...
An interest in alternate propellants for ion-bombardment thrusters, together with ground application...