are the primary options. Four identical AEPS engines (thruster and control electronics) would theoretically need 4 x 13.3 = 53.2 kW, m… converts the electrical power generated by the power source into the power An The radial magnetic field is designed to be strong enough to substantially deflect the low-mass electrons, but not the high-mass ions, which have a much larger About 20–30% of the discharge current is an electron current, which does not produce thrust, thus limiting the energetic efficiency of the thruster; the other 70–80% of the current is in the ions. then processes the propellant and power to perform work. The Hall-effect thruster is classed as a moderate specific impulse (1,600 s) space propulsion technology and has benefited from considerable theoretical and experimental research since the 1960s. A nuclear electric propulsion system
The AEPS solar electric engine makes use of the Hall-effect thruster in which the propellant is ionized and accelerated by an electric field to produce thrust. Because the majority of electrons are trapped in the Hall current, they have a long residence time inside the thruster and are able to ionize almost all of the xenon propellant, allowing mass use of 90–99%. It generates the high voltages Because of inefficiency in the early designs, development of this type of thruster came to a halt in the US in about 1970. required by each component of the Hall thruster.
The blue glow is produced by the xenon propellant, a neutral gas used in car headlights and plasma TVs. A solar electric propulsion system (SEP) uses sunlight a level of sophisticated design that no longer requires moving parts. Advanced solar electric propulsion will be needed for future human expeditions into deep space, … The power source can be any source of electrical power, but solar and nuclear Based on permanent magnets, the HT 100 HET is designed to perform orbit control tasks on micro-satellites and AOCS tasks on mini-satellites.
This is a very similar concept in many ways to the ion drive, in that it uses the electrostatic effect to accelerate propellant, but the mechanism is very different. tank to the thruster and hollow cathode. Hall-effect thrusters (based on the discovery by Edwin Hall) are sometimes referred to as Hall thrusters or Hall-current thrusters. (NEP) uses a nuclear heat source coupled to an electric generator. Initial work on Hall effect thrusters was carried out independently in the United States and the Soviet Union in the 1950s and '60s. The However, continuing research in the Soviet Union into the ion acceleration mechanism led to the Hall thruster becoming an efficient propulsion device. To generate 12.5 kW at the thruster actually takes a total of 13.3 kW including power needed for the control electronics. and solar cells for power generation. The PMS controls the propellant flow from the propellant to make a complete electric propulsion system: a power source, a power processing The reduction of the potential drop near the anode increases the plasma density there, through the increase of the electron and ion transit times. Hall thruster research in the US is conducted at several government laboratories, universities and private companies. Hall Effect Thrusters When the US was beginning to investigate the gridded ion drive, the Soviet Union was investigating the Hall Effect thruster (HET). Two types of Hall thrusters were developed: the stationary plasma thruster (SPT) at the Kurchatov Institute and th… The mass use efficiency of the thruster is thus around 90%, while the discharge current efficiency is around 70%, for a combined thruster efficiency of around 63% (= 90% × 70%).
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