Chapter 732 Three Bombs Exploded Simultaneously! (Part 2)

At this moment.

Looking at a bunch of big guys with excited expressions.

Xu Yun suddenly felt a sense of emotion in his heart.

The efforts of himself and Dayu in the past few days finally had a chance to be made public.

What?

You asked how much Xu Yun contributed?

Just kidding.

It's scary to say it. Without Xu Yun's assistance, Dayu's efficiency would at least drop by several levels - the pencils that Dayu used for calculations were sharpened by Xu Yun one by one!

What is the assist of the century.JPG.

While Xu Yun was feeling very relieved, Dayu finally introduced his ideas:

"Comrades, this is almost the design of the miniaturization of the hydrogen bomb. If any comrade has any ideas or objections, please raise them now."

The relevant parameters of the hydrogen bomb are the highest level of secrets in any country, but even if they are as high as the level of Emperor Huang Tian, ​​these confidential data will eventually be implemented through production.

And these big guys in the conference room are responsible for the production link, so Dayu did not hide much when introducing the content of the hydrogen bomb, and even reported the specific parameters.

After hearing Dayu's question.

Soon, a relatively young expert in the audience raised his hand:

"Comrade Yu Min, I have a question."

Da Yu smiled at him politely:

"Comrade Zhang Qing, feel free to say anything."

This young expert is called Zhang Qing, the same name as the featherless arrow in the Water Margin. Together with another female comrade named Zhang He, they are known as the two "military generals" of the 221 base.

Currently, Zhang Qing is responsible for the data derivation and production research of neutron beam collimators. He is one of the few talents who can lead projects in both theory and application.

Then Zhang Qing looked at the calculation paper in front of him, which recorded a lot of information and parameters mentioned in the introduction:

"Comrade Yu Min, according to what you said just now, the three-dimensional deflection angle you designed is 5.5. Is this value a bit small?"

"According to the idea of ​​Rutherford's formula, the cross section does not care about the positive or negative coefficient of α. The detonation angular momentum inside the hydrogen bomb after miniaturization should be E=mv∞22, M=mv∞ρφ0=∫rmin∞(ρ/r2)dr1ρ2/r22U/(mv∞2)"

"I simply calculated it according to this logic. I can't guarantee the exact result after the decimal point, but the unit digit should not be less than 7."

Zhang Qing's fair and clean appearance is a bit "a little bit of a slut" in the words of later generations, but when he asked the question, his expression and tone were very serious.

Three-dimensional deflection angle.

This is hydrogen bomb design. To be precise, it is a very important concept in the entire atomic physics.

Solid angle is usually represented by the letter Ω. It is the angle of an object in three-dimensional space relative to a specific point. It is the analogy of plane angle in three-dimensional space.

It describes the concept very simply:

It is the scale of the size of an object measured by an observer standing at a certain point.

For example, for a specific observation point, a small object near the observation point may have the same solid angle as a large object far away.

With the observation point as the center of the sphere, a unit sphere is constructed. The projection area of ​​any object projected onto the unit sphere is the solid angle of the object relative to the observation point.

This is similar to "plane angle is the length of an arc on the unit circle".

Solid angle is a measure of the size of the spatial angle, which is similar to the theorem "plane angle is the length of an arc on the unit circle".

On a plane, the circular angle multiplied by the radius is equal to the chord length, and the solid angle multiplied by the square of the radius in space is equal to the surface area of ​​the sphere.

In this way, a solid angle formula Ω=SR can be defined, the area element is Rsin(θ)dθdψ, the solid angle is Ω=sin(θ)dθdψ, and the solid angle of the closed curve is Ω=∫sinθdθdψ=2π(1cosθ0).

So the unit of solid angle is not [°] as many people may subconsciously think, but sr.

The maximum value of solid angle is 4π, or approximately equal to 12.57.

In the process of nuclear fusion.

The solid angle is a linkage parameter of the detonation angular momentum, which can be understood in a sense as the relationship between the total number of words written by a writer in a single day and the speed of writing.

When the time of writing words per day, that is, the propagation speed of X-rays remains unchanged.

The faster the writer's writing speed (detonation angular momentum), the more (higher) the total number of words written in a single day (solid angle), and vice versa.

Just as most writers have to update at least 4,000 words a day, the solid angle will have a theoretical lower limit in each scenario.

This lower limit will vary according to the setting of each system framework. In the framework designed by Greater than , the solid angle should not be less than 7 in theory.

In addition to Zhang Qing, there were many theoretical experts at the scene. They picked up their pens and did a simple calculation after hearing this.

In the case that Greater than has clearly given the relevant parameters, this calculation process is simply to use Gaussian elimination to solve the three-variable cubic equation system.

Therefore, in less than two minutes.

Many scholars put down their pens, or whispered to the people around them, or nodded slightly.

Obviously.

The situation Zhang Qing said does exist - the solid angle designed by Greater than is too small.

Although a solid angle below the lower limit can increase the explosion efficiency of nuclear materials, it is a fatal flaw for subsequent energy transmission and can easily lead to detonation failure - just like a writer who writes less than 4,000 words a day, you can do this, but you will be out of attendance.

However, Dayu's expression at this time seemed very calm. He waited for all the scholars who were calculating to put down their pens before slowly saying:

"That's right, Comrade Zhang Qing, if you look at it from the perspective of Rutherford's formula, this solid angle is indeed a bit small."

"According to the information we have at present, both the Thousand Layer Pancake Hydrogen Bombs across the sea and the Russian Bear also use Rutherford's formula."

"But is there a possibility - I just said it's possible, although Rutherford's formula is applicable to the derivation of solid angle, it is not actually the choice of maximizing efficiency?"

Zhang Qing was stunned.

Then Dayu thought for a while and continued:

"Everyone knows the CA10 transport vehicle in our base. Theoretically, its maximum speed is 65 kilometers per hour."

"But this does not mean that the limit of the 5.6-liter 6-cylinder engine on the CA10 is this number. If it is replaced with a car with better hardware conditions, then its speed may burst to 80 kilometers per hour."

"CA10 is the Rutherford formula. It can smoothly control that engine and even run thousands of kilometers without problems, but it is not the limit framework of the engine."

This time, Zhang Qing finally understood what Dayu meant:

"Comrade Yu Min, are you saying that you have derived a scattering formula that is more efficient than the Rutherford formula?"

Dayu He nodded heavily:

"That's right."

Then Dayu picked up the chalk and wrote directly on the nearby blackboard:

"Rutherford's formula describes a classical scattering cross section, which is an excellent theory in the context of atomic bombs or nuclear fission."

"But according to my deduction, when the conditions are changed to fusion, even in the framework of uncontrolled fusion, there is actually a trap in the collision parameters of point particles."

Zhang Qing raised his voice a few points:

"Trap?"

"Yes."

Dayu drew a circle on the formula he wrote and explained:

"In the case of fusion, there is an imaginary value for the speed of point particles."

"This imaginary value looks like a limit value, but in fact it can be faster."

It was mentioned earlier.

Just like the solid angle is not a conventional degree angle, the scattering cross section is also not a cross section in conventional cognition.

This is a physical quantity that describes the probability of scattering of microscopic particles, also known as the collision cross section.

When a moving particle collides with another stationary particle, if the number of moving particles passing through a unit area perpendicular to the direction of motion in unit time is 1, and the number of stationary particles is also 1, then the probability of collision per unit time is called the collision cross section.

The dimension of the cross section is the same as the dimension of the area, and the unit is barn, 1b=1024cm2..

If the collision is elastic scattering, the corresponding cross section is called the elastic cross section, and if the collision is inelastic scattering, the corresponding cross section is called the inelastic cross section.

In 1909.

Rutherford conducted an alpha particle scattering experiment, and based on this experiment, he established a nuclear structure model of the atom, opening up a new world of atomic physics.

This experiment also provides a method for future generations to study the structure of matter by scattering, which has a profound impact on the development of modern physics and has been widely used in many fields of modern and contemporary physics.

In classical mechanics.

The movement of particles has a certain orbit, so the key to classical scattering is also to find the orbit, that is, to find the relationship between the scattering angle and the collision parameters. Of course, Newton's laws of motion are used here.

Most proofs of Rutherford's scattering formula use Newton's second law or Binet's formula, as well as basic knowledge of conic sections combined with parametric geometric methods, etc.

"Assume that the incident particle in the area element dσ on the incident cross section is scattered and located in a solid angle of size dΩ. Obviously, the larger dσ is, the larger dΩ is."

Yu Da wrote on the blackboard with the chalk in his hand, and said quickly:

"Define the ratio of the two as the differential scattering cross section, that is, D(θ)=dσdΩ."

"And dσ=bdbdφ, dΩ=sinθdθdφ, so D(θ)=bsinθ|dbdθ"

"The absolute value symbol appears in the above expression. As the collision parameter b increases, the scattering angle will decrease, so db/dθ is a negative value, and the differential cross section we define is a positive value."

"But in fact, in the nuclear fusion scenario, the orbit of the alpha particle is not one hyperbola, but two."

"This can be obtained mathematically by separating variables and integrating, and can also be derived from the Yuanqiangon model of Comrade Zhao Zhongyao and others."

All students who have studied theoretical physics in later generations should know it.

The data of the particle scattering experiment differs greatly from the theoretical value when the scattering angle is very small, that is, when θ<15o, this is because multiple scattering is dominant at small angles, and the scattering angle distribution is close to the normal distribution.

Therefore, the Rutherford formula has limitations to a certain extent because its framework is a center of mass system.

This is one of the few public information related to the miniaturization of hydrogen bombs in later generations. The essence is that the particle model research in later generations has achieved very good results - at least compared to the current period.

But on the other hand.

The optimization scheme proposed by Da Da only has a certain effect on the miniaturization of hydrogen bombs. Whether it is a weaker atomic bomb or a more advanced neutron bomb, this scheme is almost not used.

Therefore, even Ah San in future generations knows this information, but still cannot apply it in practice - because they still have a lot of pre-technical breakthroughs.

Later, Da Da made some more arguments and finally put down the chalk:

"That's the specific derivation process. Comrade Zhang Qing, if you have any objections, you are welcome to raise them in time."

Zhang Qing looked at the calculation steps he had written simultaneously on the paper and suddenly asked:

"Comrade Yu Min, how many kilotons is the yield of this miniaturized hydrogen bomb you designed?"

Yu Min seemed a little surprised by what Zhang Qing said. He originally thought that Zhang Qing would ask theoretical questions, but he still said honestly:

"4.396 million tons."

"4.396 million tons."

Zhang Qing repeated the number, was silent for a few seconds, and clapped with a solemn expression.

Snap, snap, snap

The applause of one person seemed a bit lonely in the conference room, but soon, a second scholar clapped his hands together.

Then the third, fourth, eighth, and twelfth places

More than ten seconds later.

The entire conference room was filled with thunderous applause.

Thirty-three top experts expressed their respect for DaDa in this way. As practitioners in atomic energy-related fields, they are all too aware of the difficulty and importance of DaDa's achievement.

If this achievement is applied to any country, it can occupy the top position of chief scientist of the military - even across the sea and Mao Xiong.

Not an exaggeration.

If Da Zhen went to the other side of the sea, Oppenheimer would have to toast him a glass of wine.

And in the local area at this time.

The only "reward" that can be obtained temporarily is the applause of the 33 experts and scholars in the audience.

No one else knows that in this desolate and uninhabited Gobi Desert, China, this ancient country that has just been reborn from fragmentation, has ushered in what kind of historical node.

but

Although dark clouds temporarily obscured the starry sky, the dazzling light of the supernova explosion will eventually be revealed to the world.

When he doesn't, when their names are no longer code names, the whole land of China will be proud of them.

Many small countries dream of a strong man descending from the sky, but China has a whole generation of such heroes.

What a blessing.

"."

The applause lasted for more than half a minute and then gradually stopped.

Then Li Jue took over the leadership of the meeting. He looked around the scene and said:

"Okay, comrades, everyone must be aware of the results of Comrade Yu Min's argument."

"Let me confirm one last time. Are there any comrades who have different opinions on Comrade Min's derivation results?"

"Comrades who have different views please raise your hands."

The audience responded with silence, and many experts immediately shook their heads.

Seeing this situation, Li Jue nodded with satisfaction:

"very good."

He was not surprised by the crowd's reaction, the applause just now was enough to explain everything.

Then he took another deep breath, and a murderous look suddenly appeared on his elegantly dressed face:

"That being the case, comrades, I hereby officially announce something."

"With the approval and signature of the leaders of the capital, it has been decided to add the micro neutron bomb to the third category for the test explosion on September 19 this year, and the relevant parts will be put into production from now on."

"Let's do it then. Three bombs will explode!"