Reservoir Scandate Cathode for Electric Propulsion, Phase II

Metadata Updated: May 2, 2019

We propose to combine the two most powerful cathode technologies into one hollow cathode assembly for use in ion and Hall-effect thrusters. Together, these technologies will boost ion thruster performance and life beyond current art. Reservoir cathodes have demonstrated, in microwave tube environments, lifetimes beyond 100,000 hours with no drop in output. Scandate impregnated cathodes have demonstrated emission beyond 10 amps/cm2 at 800 degrees Cb(W) and emission levels over 100 amps/cm2 at under 1000 degrees Cb(W). This is over 200 degrees below comparable all-tungsten impregnated cathodes, the cathode normally used for space propulsion. High temperature is the great enemy of long cathode life. Longer-life cathodes are needed for interplanetary and lunar missions, as well as earth-escape and near-earth maneuvers. In Phase II, we shall continue developing the hybrid scandate reservoir cathode and perfect our stand-alone scandium-doped tungsten cathodes. We shall continue to improve our hollow reservoir technology. Then we will combine the two technologies into an integrated module.

Access & Use Information

Public: This dataset is intended for public access and use. License: U.S. Government Work

Downloads & Resources


Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date August 1, 2018
Metadata Updated Date May 2, 2019
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_33301
Maintainer Email
Public Access Level public
Bureau Code 026:00
Metadata Context
Metadata Catalog ID
Schema Version
Catalog Describedby
Datagov Dedupe Retained 20190501230127
Harvest Object Id d60d7a5d-119a-4eab-a194-043109f93460
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2017-12-01
Homepage URL
Data Last Modified 2018-07-19
Program Code 026:027
Source Datajson Identifier True
Source Hash 0a37a70d5d4c98f2d5e1a5b81081c2eacaceb8c8
Source Schema Version 1.1

Didn't find what you're looking for? Suggest a dataset here.