Subject: Re: Centrifuges?
Thanks for the clarification. Obviously, I never worked on nuclear power (or weapons). My emphasis was astrophysics. I was only loosely acquainted with the general ideas. I was pretty sure they would have to separate fluids (solids don't separate very well), but I didn't remember that it was a gas until you said so.

All I know about nuclear weapons is that you want to achieve critical density at the moment of maximum neutron flux. I sorta know how they do the critical density bit, but I don't know how they affect the neutron flux. Of course, at that point they already have enriched product.