Ammonia fuelled space electric propulsion systems using C12A7:e- electride as electron emitter

Designing Electric Propulsion Systems for UAVs

Development of Hollow Cathodes for Space Electric Propulsion at Sitael

Hollow cathodes are electron sources used for the gas ionization and the beam neutralization in both ion and Hall effect thrusters (HETs). A reduction of power and propellant consumption from the cathode is particularly needed in small satellite applications, where power and mass budgets are inherently limited. Concurrently, the interest in high-power HETs is increasingly fostered for a number ...

Advanced Hall Electric Propulsion for Future In - Space Transportation

The Hall thruster is an electric propulsion device used for multiple in-space applications including orbit raising, on-orbit maneuvers, and de-orbit functions. These in-space propulsion functions are currently performed by toxic hydrazine monopropellant or hydrazine derivative/nitrogen tetroxide bi-propellant thrusters. The Hall thruster operates nominally in the 1500 s specific impulse regime....

In situ measurements of the apex electric field in an electrospray emitter using scanning electron microscopy

In-situ observation of an operating ionic liquid electrospray emitter was achieved using a LaB6 transmission electron microscope. The emitter was an electrochemically etched tungsten needle that was externally wetted with the ionic liquid OMIM-BF4. During both positive and negative emission solid dendritic structures were created and left behind at the emission sites. These structures were seen...

Mathematical Modelling of Diesel-Electric Propulsion Systems for Marine Vessels

This article presents a mathematical model of a complete diesel-electric propulsion system, including components as diesel generators, distribution network, variable speed thruster-drives, and conventional motor loads. The model is split into two parts: One power generating part where the load is speci®ed with an aggregated active and reactive power load demand. Secondly, a power consumption pa...