Electromagnetic interference on the arduino system

I am an inventor and I am working on a design for a coilgun (for those that don't know, it is a device that fires projectiles using magnetic fields as propulsion. They are also sometimes referred to as "Gauss Rifles" although this is technically a misnomer) with which I plan to use the arduino system for timing purposes. My concern is that the magnetic field strength can (if my calculations are correct) exceed 10 teslas- said field establishing in less than a 1/10 of a second (also collapsing in the same timeframe)- and might induce significant currents in the processor and associated circuitry. To what extent should I attempt to shield the arduino board from the pulse emanating from the drive coil?

I would think that the amount of shielding required would be a function of distance, wouldn't it?

How far will the Arduino be from the magnetic field?

You should check out this site. http://www.powerlabs.org/

This guy has been working with things like you are talking about for a long time and may be willing to offer you some information if you're nice. ;)

EDIT: This page in particular: http://www.powerlabs.org/railgun2.htm