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Liquid-metal-fed Pulsed Plasma Thrusters for In-space PropulsionLiquid metal propellants may provide a path toward more reliable and efficient pulsed plasma thrusters (PPTs). Conceptual thruster designs which eliminate the need for high current switches and propellant metering valves are described. Propellant loading techniques are suggested that show promise to increase thruster propellant utilization, dynamic, and electrical efficiency. Calibration results from a compact, electromagnetically-pumped propellant feed system are presented. Results for lithium and gallium propellants show capability to meter propellant at flow rates up to 10 +/- 0.1 mg/s. Experiments investigating the initiation of arc discharges using liquid metal droplets are presented. High speed photography and laser interferometry provide spatially and temporally resolved information on the decomposition of liquid metal droplets , and the evolution of the accelerating current channel.
Document ID
20040075614
Acquisition Source
Marshall Space Flight Center
Document Type
Conference Paper
Authors
Markusic, Thomas E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
August 21, 2013
Publication Date
January 1, 2004
Subject Category
Metals And Metallic Materials
Meeting Information
Meeting: JANNAF Propulsion Meeting
Location: Las Vegas, NV
Country: United States
Start Date: May 10, 2004
End Date: May 14, 2004
Sponsors: Department of the Navy, NASA Headquarters, Department of the Air Force, Department of the Army
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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