Thanks again, Dave. I expected the equation would be magnificently difficult. I wish I could find experiments of this nature, as that can make calculations much easier. Strangely, I found very little in the ways of building charge via radiation (only a couple at the tiniest scale).
Do you know of a member of the forum who may be experienced with this? I would like to PM them for advice.
I can't thank you enough for your help. I looked everywhere for the answers to my questions, and came up with almost nothing. Now, I have pretty well everything I need. I'll look into Maxwell's equation.