> Lower initial density isn't really an advantage.
Wouldn’t larger change in density for a given force be an advantage, though? It allows you to have a larger subcritical mass (at the lower density) that becomes critical as force is applied, without having to play geometric games; but maybe those games are trivial?
Wouldn’t larger change in density for a given force be an advantage, though? It allows you to have a larger subcritical mass (at the lower density) that becomes critical as force is applied, without having to play geometric games; but maybe those games are trivial?