Richard appears at the spell testing ground at the bottom of the Sinkhole in Eden.

This is already the seventh day after the start of the creation of nuclear weapons.

After a week, he completed the first four important processes of nuclear weapons production, as well as many of the subsequent tedious processes, and advanced the progress to 60 percent, with 40 percent of the progress remaining to be completed.

Now, what he wants to do is the more important step in the 40 percent progress -- the experiment of nuclear weapons with explosives.

As mentioned earlier, nuclear weapons such as atomic bombs are composed of an initiation control system, a high-energy explosive, a reflective layer, a nuclear component containing a nuclear charge, a neutron source, and a shell.

The high-energy explosives are the energy source for pushing and compressing the reflective layer and the nuclear charge. In other words, it is a high-explosive charge that violently stacks together the previously manufactured "crystal heart" metal uranium components to a supercritical state, and then triggers a nuclear explosion.

In the case of a gun-type atomic bomb, the setting of high-energy explosives is extremely simple, as long as it can be exploded.

But in order to avoid waste and save hard-won uranium-235 nuclear raw materials, Richard created an atomic bomb not in the gun type, but in the implosion type.

This requires that high-explosive charges not only be able to explode, but also be blown up to standard.

What do you mean by meeting standards?

Generally speaking, implosion-type high-explosive charges are installed inside nuclear weapons in the shape of dozens or hundreds of pieces, arranged in an oval shape, which looks like a pearl necklace.

In order to allow the metal uranium component to be squeezed to the greatest extent, it is necessary to ensure that each "pearl (explosive block)" on this "pearl necklace" can be detonated together, and then the impact force of the explosion is transmitted through the rhenium-tungsten alloy component and acts on the metal uranium component at the same instant.

The most important thing is at the same time.

It has to be at the same time.

The error should not exceed one subtlety, or one millionth of a second.

Because the speed at which explosives explode is very fast.

The detonation rate of low-grade explosives such as mercury thunderate can reach the level of several thousand meters per second, while the detonation speed of high-grade explosives such as "Hei Suojin", "Tai'an", and "Octojin" can be close to 10,000 meters per second.

Monsters such as "CL-20 (hexanitrohexazaisowoodane)" and "DNAF (4,4'-dinitro-3,3'-oxide azofur)" directly exceeded the 10,000 meters per second mark, and there were ultimate explosives such as pentazole anionic salt and metallic hydrogen (1).

Even if the explosive speed is controlled at 8 kilometers per second, the difference of one microsecond is eight millimeters, close to one centimeter.

This distance is nothing elsewhere, but in nuclear weapons, it is deadly, so it must be detonated at the same time.

And just detonating explosives at the same time is just the beginning.

You must know that the propagation of the explosion and the release of power are from a point to a ball. Even if it is really possible to ensure that all explosives are detonated at the same time, countless "spherical pressure surfaces" are used to squeeze the uranium metal components.

It's like squeezing a huge dough with countless blown basketballs, and it's impossible to guarantee that the surface of the dough won't be dented.

Where there is a depression, there is a defect.

Therefore, even if the detonation time error of all explosives is strictly controlled within one microsecond, it still cannot meet the design requirements of implosion atomic bombs.

According to the design requirements of the implosion atomic bomb, the spherical pressure must be turned into a plane pressure, and the metal uranium components must be squeezed with a flat surface, so that the metal uranium components can be squeezed tightly enough to achieve a higher supercritical state and make greater use of hard-won nuclear materials.

But how does a sphere become a plane?

Explosives don't obey, they don't spread how outsiders tell them, they just faithfully follow the rules of physics to release their power.

Between two points, the line segment is the shortest.

As long as the distortion of space is not considered under the framework of classical mechanics, then according to the law of the shortest path, the power is transmitted from one point to the surrounding area, and the final formation is a spherical surface.

Always a ball.

Ball!

There is only one way to deal with this ball, and that is to use compound explosive blocks.

That's right, compound explosive blocks.

Composite explosive blocks, as the name suggests, are made up of a variety of different explosives.

As we all know, the types of explosives are different, and the detonation rate is different, so it is completely possible to design the explosive block in this way: the middle is a low-speed explosive, the outside is a medium-speed explosive, and the outermost is a high-speed explosive.

When explosives are detonated, low-velocity explosives will spread slowly, followed by medium-speed explosives, and high-velocity explosives will be very fast. In this way, the pressure surface, which is originally spherical diffusion, will appear to a certain degree of depression, and a plane will be formed in a certain direction.

In practice, some optimization can also be made.

For example, only two explosives with different detonation rates are needed, and the ratio of low-velocity explosives and high-velocity explosives can be adjusted in each explosion zone to control the propagation speed of explosives.

For example, for example, the detonation rate of high-velocity explosives is 3, and the detonation velocity of low-velocity explosives is 1. In the middle explosives section, make an explosive column, the upper third is filled with low-velocity explosives, and the lower two-thirds are filled with high-speed explosives, so that the speed of the entire explosive column will be balanced into 2.

The peripheral explosive partition, the explosive column can be filled with low-speed explosives in the upper sixth, and the lower five-sixths filled with low-speed explosives, so that the speed of the entire explosive column will be balanced to about 2.7, which is different from the central explosive partition, and finally produces a pressure plane.

What Richard is doing now is to use different explosives and adjust different ratios to test which explosives are the most stable and which explosives can meet the requirements.

Standing in the spell research field, Richard took out columns of explosives from the spatial iron ring, and began to arrange them in earnest around a fist-sized test target.

The arrangement is completed, and the detonation is decisive.

"Boom, boom!"

In the spell testing ground, explosions kept sounding, and Richard continued to test.

It has to be said that in order to find the most suitable value for the detonation of explosives for nuclear weapons, it is necessary to carry out tedious tests. Moreover, every test requires that there must be no error.

Because under the high explosion rate of explosives, every error will be magnified thousands of times, resulting in a failure.

Fortunately, with the guidance of mathematics, more than 99% of the wrong options can be eliminated in advance, and it is only necessary to repeatedly test the correct ones to find the optimal solution.

"Boom, boom!"

Time keeps ticking.

......

In the blink of an eye, another three days passed.

Over the course of three days, Richard conducted dozens or hundreds of explosion tests at the spell testing ground, and finally solved the problem of initiating explosives, determined what kind of composite explosive was the most suitable, and produced a sufficient number of them.

In other words, three days has taken a big step towards the complete successful manufacture of nuclear weapons.

......

Note (1): For the knowledge of explosives, please refer to Chapter 386 of this book "Pentazole Anionic Salts" for details.