On Fri, 21 Mar 2003 17:00:09 +0100, Russell Coker said: > The problem with lead is that it's poisonous and soft. Having to wash your > hands after touching your computer could get annoying.
Been there, done that. Had an experimental rig that for various reasons meant that we had a old AT-class computer that had to be within 4-6 inches of the beam in the accelerator (the actual constraint was a 18" tether one end of which was in a memory slot and other end which was actually in the beam). We had a lot of problems with backscattered stuff, so we ended up with a jacket that had a layer of lead to stop the high-energy stuff, but that had a lot of thermal neutrons coming out of it, so there was a layer of paraffin (I think, it's been close to 20 years now) to moderate those, and then the paraffin emitted the occasional alpha and beta particles, so there was a layer of metal foil to stop THOSE. If I got some more caffeine into me, I might even be able to relate the multiple layers needed for that rig to filesystem design. ;)
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