My notional spacecraft is essentially a metal cube holding a number of nukes in front of it to shield them from detonations behind it. It has a nuke-launching mechanism which projects a nuke a certain distance behind it before detonation.
i) What force F would a large H-bomb exert per square metre of my cube in space at, say, 1 km proximity? Assuming that radiation falls off exponentially, how much radiative energy E would be incident per square metre?
ii) What would my cube comprise (eg. a titanium cube with reflective shielding) in order to offer the best low-weight/high durability solution?
iii) Given that the cube of (ii) has a density of D kg per square metre exposed to the force F of part (i), how many nukes would be required to accelerate the structure to, say, 0.1c? Also, what temperature would each cubic metre attain given its specific heat capacity and E?
Further feasibility/modification questions to follow, perhaps. (I would research all this myself if I had time - go on, indulge me.)