Light Metal Propellant Hall Thruster Project

Metadata Updated: July 8, 2015

Busek proposes to develop light metal Hall Effect thrusters that will help reduce the travel time, mass, and cost of SMD spacecraft. Busek has identified three attractive light metal propellants: magnesium (Mg), zinc (Zn), and a eutectic (Mg/Zn). These metals are plentiful and practical alternatives to Xe and Kr, which are expensive and scarce, and Bi, which is overly condensable and requires a high voltage power processing unit (PPU) to reach velocities of interest. Because Mg and Zn are lightweight, specific impulse [HTML_REMOVED] 3000 s will be available with a near term, low voltage PPU, decreasing propellant mass and program and hardware costs. Both metals have favorable ionization properties, implying high efficiencies are possible. Mg can also be combusted with water in a rocket, enabling a multi-mode propulsion system where the Hall thruster and rocket share propellant. The availability of a high thrust impulsive mode can greatly decrease delta V and trip times for SMD spacecraft.

These light metals are non-toxic and solid at room temperature. They can be stored and fed to a thruster as a wire. For Zn and Mg/Zn, liquid distribution is also feasible. Life testing will be low cost because the light metals are inexpensive and self pumping; they will condense on the vacuum chamber wall. Vapor pressure curves suggest minimal spacecraft interactions.

In-situ propellant production is also possible. Mg, for example, can be extracted from Martian regolith using solar energy.

The key innovation in this proposal is the use of light metals to fuel a Hall thruster. In Phase I, Busek will design and demonstrate a wire based light metal feed system that will be integrated with an existing 1-2 kW bismuth vapor Hall Effect thruster. Busek will then demonstrate a Mg, Zn, or Mg/Zn discharge and measure its operating parameters. Finally, Busek will lay out a dedicated thruster and feed system to be built and tested in Phase II.

Access & Use Information

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

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References

http://techport.nasa.gov/home
http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf
http://techport.nasa.gov/fetchFile?objectId=6561
http://techport.nasa.gov/fetchFile?objectId=3456
http://techport.nasa.gov/fetchFile?objectId=3447
http://techport.nasa.gov/fetchFile?objectId=6584
http://techport.nasa.gov/fetchFile?objectId=6560
http://techport.nasa.gov/fetchFile?objectId=3448

Dates

Metadata Created Date April 9, 2015
Metadata Updated Date July 8, 2015

Metadata Source

Harvested from NASA Data.json

Additional Metadata

Resource Type Dataset
Metadata Created Date April 9, 2015
Metadata Updated Date July 8, 2015
Publisher Space Technology Mission Directorate
Unique Identifier TECHPORT_8347
Maintainer
TECHPORT SUPPORT
Maintainer Email
Id {$oid: 55942a9fc63a7fe59b4994f0}
Public Access Level public
Bureau Code 026:00
Metadata Context https://project-open-data.cio.gov/v1.1/schema/catalog.jsonld
Schema Version https://project-open-data.cio.gov/v1.1/schema
Catalog Describedby https://project-open-data.cio.gov/v1.1/schema/catalog.json
Harvest Object Id 18680d33-bad8-4d9a-bd04-6df0e861a493
Harvest Source Id 39e4ad2a-47ca-4507-8258-852babd0fd99
Harvest Source Title NASA Data.json
Data First Published 2009-01-01T00:00:00Z
Homepage URL http://techport.nasa.gov/view/8347
Language en-US
License http://www.usa.gov/publicdomain/label/1.0/
Data Last Modified 2015-03-12
Program Code 026:027
Publisher Hierarchy National Aeronautics and Space Administration > Space Technology Mission Directorate
Related Documents http://techport.nasa.gov/home, http://techport.nasa.gov/doc/home/TechPort_Advanced_Search.pdf, http://techport.nasa.gov/fetchFile?objectId=6561, http://techport.nasa.gov/fetchFile?objectId=3456, http://techport.nasa.gov/fetchFile?objectId=3447, http://techport.nasa.gov/fetchFile?objectId=6584, http://techport.nasa.gov/fetchFile?objectId=6560, http://techport.nasa.gov/fetchFile?objectId=3448
Source Datajson Identifier True
Source Hash a50506f37bdb9ed889330d2fd6b8ce4c9c1c2f8f
Source Schema Version 1.1
Temporal 2009-01-01T00:00:00Z/2009-07-01T00:00:00Z

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