Remove free electrons from plasma?

[LW94]

Starting to brainstorm ideas for my Masters project. The current idea I have in mind involves a chamber of ionized gas which I would have to then separate from the free electrons.

Would removing the electrons be as simple as connecting one of the chamber walls to the positive terminal of a battery, with the negative connected to ground?

 

[Drakkith]

That might work, but the low voltage of the battery would limit how many electrons you could remove from the plasma.