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Do purely electrostatic ion traps exist?

by cantRemember
Tags: electrostatic, ions, penning, purely, trap
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cantRemember
#1
Mar17-14, 02:21 PM
P: 13
I was wondering whether you could trap a cation simply by putting it inside a positively charged sphere. Is this possible?
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mfb
#2
Mar17-14, 03:01 PM
Mentor
P: 11,576
This is impossible, see Earnshaw's theorem. You can also use Gauß' law to get the same result for a single charge in an electric field.


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