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In a gridded-ion thruster, why are the ions accelerated away from the thruster and do not just stay close to the negatively charged grid?

if the ions are accelerated due to their attraction to a negatively charged gird That they are attracted to the grid is a simplification. The potential on the grids set up an electric field that is ...
BowlOfRed's user avatar
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2 votes

In a gridded-ion thruster, why are the ions accelerated away from the thruster and do not just stay close to the negatively charged grid?

why don't the ions just stay by the grid? https://www.nasa.gov/wp-content/uploads/2015/08/ionpropfact_sheet_ps-01628.pdf The positively charged ions are accelerated out of the thruster as an ion beam,...
Woody's user avatar
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2 votes

In a gridded-ion thruster, why are the ions accelerated away from the thruster and do not just stay close to the negatively charged grid?

There are multiple electrodes and grids. The propellant is first ionized between a positive and negative grid. Just on the other side of the positively charged grid is a high voltage negatively ...
Slarty's user avatar
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1 vote

In a gridded-ion thruster, why are the ions accelerated away from the thruster and do not just stay close to the negatively charged grid?

To accelerate positive ions, the grid must be negatively charged relative to the ion emitter. However, it need not be negatively charged relative to the spacecraft: instead, the ion emitter may be ...
John Doty's user avatar
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