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Results tagged with ion-thruster
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user 18356
Questions about engines used in space that accelerate ions to create thrust.
8
votes
3
answers
931
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Why is there supposed be a current passing through the grids in an Ion Thruster?
Recently,I've posted a question on ion thrusters.
I thought that it would be enough for the grids to be charged to accelerate ions. If I have a positive plate and a negative plate, separated by a …
- 477
25
votes
6
answers
8k
views
Why are Ion Thrusters so energy hungry?
Ion thrusters need a lot of energy. But I don't understand why. So, one thing I understand is that it takes a lot of energy to achieve a high exhaust velocity (since kinetic energy is proportional to …
- 477
0
votes
3
answers
1k
views
Why don't ion thrusters use exothermic reactions directly to ionize the gas and heat up the ...
Ion thrusters require a lot of energy because of their high exhaust velocities. But why can't they just pump a mixture of hydrogen and xenon into the chamber, mix it with oxygen and burn it? Doesn't t …
- 477
3
votes
2
answers
1k
views
In an ion thruster, does the temperature of the plasma drop after acceleration?
In the last discussion on why ion thrusters are so energy hungry(Why are Ion Thrusters so energy hungry?), people said that the system is not only supposed to ionize the gas but also heat it to suffic …
- 477