# B Directional electron cloud/separating ions from free electrons

1. Sep 8, 2017

### Dohmer

If you were sending microwaves one direction to ionize a gas, would you be able to pull or separate the atoms from these directionalized electrons? Say you had a magnetic coil with a strong e field pulling the atoms one way while the microwaves were trying to push the electrons the other way-is this in any way do-able with any existing devices?

Thank you.

Last edited by a moderator: Sep 8, 2017
2. Sep 8, 2017

### Staff: Mentor

What do you mean by "directionalized electrons"?

3. Sep 8, 2017

### Dohmer

By "directionalized electrons," I mean microwaves flowing in one direction, alternating the shape of the plasma plume so that the concentration of electrons is shifted to one side.

4. Sep 8, 2017

### Dohmer

Do you follow? I suppose something that is also a part of the original question is- how do you 'pull' a current from the plasma

5. Sep 9, 2017

### sophiecentaur

The mean field of the microwaves is zero so I can't see that there will be any net resultant force on either set of charges. However, once you have the plasma, a DC field will tend to separate the charges in two directions, though.

6. Sep 9, 2017

### Dohmer

Wouldn't having a constant generation of microwaves be practically the same as a DC field? What I was thinking is that if you could shift the negative charge of a plasma in one direction, then could you draw that current effectively by some type of circuit?

I apologize for the broadness of my question..

Thank you

7. Sep 9, 2017

### sophiecentaur

What does 'practically the same' mean? The mean value is Zero so where is the D.C.?
To obtain DC power (in the form of a Current and a PD) you need some rectifying mechanism.
If this isn't too intuitive for you then try a Google search for what you are after. If it were possible then there will be a device available to do it.
Look up Magnetohydrodynamics for a design of electricity generator. Spot the essential difference between that and your idea.