Alec D. Gallimore
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View article: Future Directions for Electric Propulsion Research
Future Directions for Electric Propulsion Research Open
The research challenges for electric propulsion technologies are examined in the context of s-curve development cycles. It is shown that the need for research is driven both by the application as well as relative maturity of the technology…
View article: Update on the Nested Hall Thruster Subsystem for the NextSTEP XR-100 Program
Update on the Nested Hall Thruster Subsystem for the NextSTEP XR-100 Program Open
Under the NextSTEP program led by Aerojet Rocketdyne in collaboration with NASA Glenn Research Center the University of Michigan, and the Jet Propulsion Laboratory, the XR-100 100 kW Electric Propulsion system is being developed to Technol…
View article: Passive High-speed Imaging of Ion Acoustic Turbulence in a Hollow Cathode
Passive High-speed Imaging of Ion Acoustic Turbulence in a Hollow Cathode Open
Peer Reviewed
View article: Investigation of Channel Interactions in Nested Hall Thruster
Investigation of Channel Interactions in Nested Hall Thruster Open
Peer Reviewed
View article: Nonintrusive electron number density measurements in the plume of a 1 KW arcjet using a modern microwave interferometer
Nonintrusive electron number density measurements in the plume of a 1 KW arcjet using a modern microwave interferometer Open
Reponed here is the use of a microwave interferometric technique for making non-intrusive measurements of electron number density. Electron number density profiles were obtained throughout the plume of a 1 kW hydrogen arcjct by using a mod…
View article: IMPACT OF ANODE LAYER THRUSTER PLUMES ON SATELLITE COMMUNICATIONS
IMPACT OF ANODE LAYER THRUSTER PLUMES ON SATELLITE COMMUNICATIONS Open
Microwave interferometry was used to investigate the impact of the plume of a D-55 anode layer thruster on satellite communications. A 17 GHz microwave signal was transmitted through the plume in order to measure phase shift and signal att…
View article: Plasma Potential Measurements in the Discharge Channel of a 6-kW Hall Thruster
Plasma Potential Measurements in the Discharge Channel of a 6-kW Hall Thruster Open
In an effort to understand the role of neutral flow dynamics in the operation of Hall thrusters, a floating emissive probe was used to measure the plasma potential, electric field, and electron temperature in the discharge channel of a 6-k…
View article: 1 Langmuir Probe Measurements in the Discharge Channel of a 6-kW Hall Thruster
1 Langmuir Probe Measurements in the Discharge Channel of a 6-kW Hall Thruster Open
In an effort to understand the role of neutral flow dynamics in the operation of Hall thrusters, a cylindrical Langmuir probe was used to measure the electron temperature, floating potential, and ion number density in the discharge channel…
View article: Investigation of Channel Interactions in a Nested Hall Thruster Part I: Acceleration Region Velocimetry
Investigation of Channel Interactions in a Nested Hall Thruster Part I: Acceleration Region Velocimetry Open
Velocity distribution function maps were acquired using laser-induced fluorescence on the centerline of each channel in a two-channel nested Hall thruster.The inner channel velocity distribution maps showed that the acceleration mechanism …