Есть такой оптимист в теме мини-ньюков - Винтерберг.
Он считает, что:
"In such a “mini-nuke” the chemical high explosive implodes a spherical metallic shell onto a
smaller shell, with the smaller shell upon impact becoming the source of intense black body radiation
which vaporizes the ablator of a spherical U238 (Th232) pusher, with the pusher accelerated
to a velocity of ∼ 200 km/s, sufficient to ignite the DT gas placed in between the pusher and fissile
core, resulting in a fast fusion neutron supported fission reaction in the core and pusher. Estimates
indicate that a few kg of high explosives are sufficient to ignite such a “mini-nuke”, with a gain of
∼ 103, releasing an energy equivalent to a few tons of TNT, still manageable for the microexplosion
to be confined in a reactor vessel."
Используя килограммы ВВ в сочетании с У238, можно получить выход до тонн эквивалента.
"A further reduction in the critical mass is possible by replacing the high explosive with fast moving
solid projectiles. For light gas gun driven projectiles with a velocity of ∼ 10 km/s, the critical mass is
estimated to be 0.25 g, and for magnetically accelerated 25 km/s projectiles it is as small as ∼ 0.05 g.
With the much larger implosion velocities, reached by laser- or particle beam bombardment of the
outer shell, the critical mass can still be much smaller with the fissile core serving as a fast ignitor.
Increasing the implosion velocity decreases the overall radius of the fission-fusion assembly in
inverse proportion to this velocity, for the 10 km/s light gas gun driven projectiles from 10 cm to
5 cm, for the 25 km/s magnetically projectiles down to 2 cm, and still more for higher implosion
velocities."
А если ещё приплести к делу высокоскоростные снаряды, то получится настоящая сказка.
Лично мне хочется назвать этот оптимизм чрезмерным, потому как более осмысленные оценки дают те же тонны эквивалента при тоннах ВВ (как и сказал Ник), а снижение веса ВВ достигается внешними драйверами.