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Why not use cold plasma for acceleration?
[http://www.odu.edu/ao/instadv/quest/ColdPlasma.html]http://www.odu.edu/ao/instadv/quest/ColdPlasma.html
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Why would you want to? You can't accelerate a plasma with an electrostatic field like you can in an ion engine, the plasma itself has a low energy so it would have terrible exhaust velocity, and it would take alot of energy to create it for a very small thrust.
VASIMR, which is also a plasma rocket, achieves its high propellant efficency and thrust because of the HIGH temperature of the plasma, up to a million degrees potentially, which gives it extreme exhaust velocity.
[i]"The power of accurate observation is often called cynicism by those that do not have it." - George Bernard Shaw[/i]
[i]The glass is at 50% of capacity[/i]
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