For the purposes of the MPD thruster a typical propellant is hydrogen gas, which does not normally conduct electricity. If hydrogen was going to be the “round. In theory, magnetoplasmadynamic (MPD) thrusters could produce extremely high specific impulses (Isp) with an exhaust velocity of up to and. Ion Engines and, as we will see, Electrospray Thrusters are electrostatic devices, Magneto Plasma Dynamic (MPD) thrusters: The most powerful type, with self-.
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There are a few technically feasible approaches to get about a megawatt of power in space using nuclear power or solar power.
Russia has a project to develop about a megawatt nuclear reactor for space applications. One project is to design, build, and test two 20 kW-sized deployable solar arrays, bringing them to technology readiness level TRL 5, and through analysis show that they should be extensible to kW-class systems kw per wing.
These solar arrays are approximately square meters in total area which is about an order-of-magnitude larger than the square meters solar array blankets on the International Space Station ISS.
Orbital ATK has a promising lightweight and compact solar array structure. The elastic structure maintains stiffness throughout deployment for partially deployed power generation.
The rectangular mxgnetoplasmadynamic can be configured in magetoplasmadynamic ways by either lengthening the booms, adjusting the length and width, or attaching several winglets onto a deployable backbone. See below for a fully deployed ROSA array.
The new wings are easy to deploy and do not involve astronauts. A NASA presentation looked at space based power and storage requirements and options.
Power at the hundreds of kilowatts and megawatt levels would be great for magnetoplasmadynamic thrusters. MPD technology mxgnetoplasmadynamic has the potential for thrust levels of up to newtons N 45 lbFby far the highest for any form of electric propulsion, and nearly as high as many interplanetary chemical rockets. A magnetoplasmadynamic MPD thruster MPDT is a form of electrically powered spacecraft propulsion which uses the Lorentz force the force on a charged particle by an electromagnetic field to generate thrust.
Generally, a gaseous material is ionized and fed into an acceleration chamber, where the magnetic and electrical fields are created using a power source. The particles are then propelled by the Lorentz force resulting from the interaction between the current flowing through the plasma and the magnetic field which is either externally applied, or induced by the current out through the exhaust chamber.
Unlike chemical propulsion, there is no combustion of fuel.
As with other electric propulsion variations, both specific impulse and thrust increase with power input, while thrust per watt drops. There are two main types of MPD thrusters, applied-field and self-field.
Magnetoplasadynamic thrusters have magnetic rings surrounding the exhaust chamber to produce the magnetic field, while magnetolpasmadynamic thrusters have a cathode extending through the middle of the chamber. Applied fields are necessary at lower power levels, where self-field configurations are too weak. Various propellants such as xenon, neon, argon, hydrogen, hydrazine, and lithium have been used, with lithium generally being the best performer.
According to Edgar Choueiri magnetoplasmadynamic thrusters have input power kilowatts, exhaust velocity kilometers per second, thrust 2.
My Electric Engine – Magnetoplasmadynamic Thruster
A plan, proposed by Bradley C. Edwards, is to beam power from the ground. This plan utilizes 5 kW free electron lasers at 0. The tuning of the laser wavelength of 0. Magnetoplasmadynamic thrusters can have hundreds of times the thrust of ion propulsion for space application.