For your contemplation from
here.
The largest H-bomb found in the present U.S. arsenal
is 1.8 megatons in yield. Until 1987 we had 112 9 megaton warheads on the titian two icbms.Until 1975 we had devices in our arsenal with a yield of up to 25 megatons.
These were on the atlas, and delta icbms which were decommissioned in 1975
We use many small H-bombs such as the W - 88 and similar devices. Such devices have something like a 20 kiloton trigger, and then a natural uranium or steel or lead bottle
that contains perhaps 2 kilograms of lithium 6 or 7 duteride
inside of it. 2 kilograms of this is about right for a 100
kiloton warhead, like those we use on the trident missiles in our trident submarines.On our icbms today the highest
yield found for a single warhead is about kilotons
.
These are on the minuteman 2 Icbms. A 300 kiloton
or so warhead may have a 20 kiloton primary and a bottle containing about 7 kilograms of lithium 6 or 7 dueteride.
A standard U.SA.F 200 kiloton warhead may contain
a 20 kiloton primary and a bottle that contains about 4 kilograms of lithium 6 or 7 dueteride. These are the kinds of devices that make up most of the U.S nuclear arsenal.
Efficient Pure fission devices can produce most of this range of yields without using any nuclear fusion at all.
But the pure fission type device has one disadvantage.
It will be bigger and heavier then a small H-bomb of the same yield.
The blast radius of a nuclear explosion is equal to the cube root of the yield in kilotons. The fire radius is eqaul to the sqaure root of the yield in kilotons.
Let us comapare the effects of a 20 kiloton A-bomb with those of a 20 megaton H-bomb which is 1000 times more powerful.
The blast radius of the 20 kiloton device is 2.67 miles.
The blast radius of a 20 megaton device is 27 miles.
The fire radius of the 20 kiloton device is 4.47 miles.
The fire radius of a 20 megaton device is 141 miles.
As you can see the H-bomb makes a good incendiary
device over a vast area. 20 megatons will ignite
everything within 141 miles in every direction under ideal
conditions of terrain and weather.
This will incinerate a 242 mile diameter area with a giant firestorm. This is useful only for terrozing, and exterminating civilian populations on an enormus scale of apocalypse. This has very little miltary value especially when H-bombing targets is a game that two belligerents can play, but this will only annhilate both sides completely.
An H-bomb war results in total apocalypse for both sides,
but an A-bomb war will not necessarily result in
such an appocalypse, although heavy/appalling damage
will be done, but it would be no worse then say world war
2 was in the degree of damage to the civillian population,and cities of Europe , and Japan:
1000 A-bombings might destroy 1000 large cities and kill 80,000,000 people: But a large target nation will survive, without suffering total annhilation from a mere atomic war.
A thermonuclear war however with 1000 multimegaton
H-bombings however will incinerate literally everything and almost nothing will survive a thermonuclear war, resulting in total apocalypse. Notice that theorecticly an attacker
could explode only 10 20 megaton H-bombs across the United States from coast to coast in a straight line through the middle , and this would literally incinerate the whole U.S.A. with a coast to coast fire fire storm that would burn all the lower 48 states to ashes.That is what just 10 20 megaton H-bombs can do in theory, imagine what 1000 or 10,000 20 megaton H-bombs can do.In the cold war this threat was a good thing because it forced both sides to keep the peace instead of fighting a thermonuclear world war 3. This what was meant by M.A.D. ( mutaul assured destruction).
Perhaps a similar threat like Mad will force the countries of India and Packistan to keep the peace between them, like
occurred in the U.S. Soviet cold war.
.