Chapter 646: Yuda's Concerns
after an hour.
The original calculation room.
Da Da, Qian Wushi, Qian Bingqiong, Zhao Zhongyao, Zhou Guangzhao, Wang Ganchang, Lao Guo, Peng Mengxiong
All the famous physicists of later generations were gathered at the front of the room like curious babies, staring at a certain drawing in front of them with bright eyes, and exclaiming from time to time:
"Wonderful, wonderful"
"Excuse me, please give me a break."
"Fuck, is there anyone like you who gets into someone's crotch?"
"Look, this thing is so exquisite."
"Look at area A2, 86.324. That should be the parameter designed by our team, right?"
"Xiao Zhou, please wipe your saliva quickly, it's almost dripping on me!"
"Bliss."
And at the front where these people gathered.
That is, on a huge drawing with a size of 1.5X1.5, a large round ball like the base of an ear is clearly drawn.
The interior of this sphere is divided into many modules. In addition to specific parameters, some modules are also marked with corresponding chemical reaction formulas or mathematical formulas.
That’s right!
The ball drawn on this drawing is the atomic bomb "Miss Qiu" that the rabbits have longed for.
design diagram!
"OK OK."
after awhile.
Seeing that the crowd had the tendency to pounce on the drawings at any time, Lu Guangda quickly waved his hand and stepped in to control the scene:
"Please stop here first! Just a reminder, this blueprint is a real one-if anyone damages it, prepare to be punished!"
"If you really want to see it, you can take this time. When the copies of the drawings come out in two days, everyone will have a copy. Then you can lick them if you want, okay?"
"Everyone counts, get back to your seats first, hurry up!"
Lu Guangda has been called 'Doctor Doll' since a long time ago. He is cheerful and polite to everyone and rarely gets angry.
Now that he suddenly had a serious face, it still had some effect on people who were used to his kind face.
In addition, these bosses indeed just lost their composure for a moment, and their basic rationality was not lost, so they quickly returned to their positions one after another.
"."
After everyone returns to their seats.
Lu Guangda just put down his hands on his waist, and his tone gradually returned to calm:
"Comrades, I can understand your mood, but at this time, we must remain calm."
"When I was studying abroad at Purdue University, I once saw a football match. The two teams were international students from the Politecnico di Milano and the University of Liverpool."
"At that time, the University of Milan took a 3-0 lead in the first half, and someone even opened champagne early during the halftime break. However, in the second half, the University of Milan chased three goals in a row, and ultimately lost the game."
"There are often many uncertain factors before everything in the world comes to fruition, not to mention that our current progress cannot be considered very satisfactory - there are still several mountains waiting for us to climb."
"So we must stay calm at this time. Just use what Xiao Xu said to me before. Oh, save your character."
"The more character we accumulate now, the easier the subsequent work may be. I think this makes sense."
A burst of chuckles soon erupted from the audience.
really.
Although the atomic bomb drawings or the finalization of the design drawings are not so small that they can only be described as "the first step in a long march of thousands of miles", in terms of the overall progress, they can only be regarded as a small part of the progress.
After the design drawing is completed.
The production of parts and components is also not an opponent that can be underestimated.
For example, the refining of enriched uranium, the proportion of explosives that Xu Yun visited before, the production of neutron sources, etc.
Just like the later Kirin 9000s, the special thing about this chip is the breakthrough from 0 to 1. In fact, there are still many areas that need to be improved and caught up in terms of performance.
After all, excitement is temporary, and business matters must ultimately be discussed from a business perspective.
The same goes for the atomic bomb.
Today, Miss Qiu's health bar has been stripped off, but it is still not easy to get rid of the 9999999 health bar.
Then Lu Guangda looked around the scene and continued:
"Okay, now that everyone has calmed down, let me introduce the specific height and weight of our 'Ms. Qiu'."
Say it.
Lu Guangda pointed at the center of the drawing with his finger, and then said:
"Let's start with the innermost layer of this atomic bomb. This is a Po_Be neutron source with a diameter of 2cm. The neutron source intensity is about 75Ci."
"Then follows."
Lu Guangda's introduction method is from the inside to the outside, which is also the most intuitive introduction method.
According to the design of Lu Guangda et al.
The ignition neutron source of "Miss Qiu" consists of two parts, namely the outer shell and the inner tank.
The inner tank is 4mm wide in diameter and made of beryllium.
The shell is designed in the shape of a wedge-shaped transverse groove, which is actually to use a long space to isolate the alpha particles emitted by the polonium-210 plated on the inside of the shell with air to prevent premature ignition.
After the alloy foil is attached to the inner side of the shell, 1.5 mg of polonium-210 is precipitated by precipitation method, that is, polonium is precipitated by using a reducing agent stannous chloride solution in a polonium chloride solution. Telluric acid can also be added to the polonium chloride solution as a carrier in advance. After the precipitation with stannous chloride, polonium will co-precipitate with tellurium, which is convenient for operation.
The outer layer of the neutron source is a nuclear charge uranium 235, with a total weight of 5.1 kg and a diameter of 18 cm.
Students who have studied atomic bombs should know it.
When the uranium crystal form is α phase, although the critical mass is small, it is easy to break and is not conducive to mechanical processing.
This makes it easy to cause accidents inside the nuclear bomb, or it cannot be detonated due to fragmentation.
Therefore, during the smelting period, it is necessary to add 3 to 3.5 mole fractions of gallium (converted to 1 to 2% by weight) to turn uranium into a δ phase that is not easy to break.
Although the critical mass of δ phase uranium is not very low, it is very close to the critical mass when it is wrapped with a thick uranium-238 as a neutron reflection layer.
At the same time, when the detonation wave of the outer layer of explosives squeezes the nuclear charge, the density of delta uranium increases suddenly, and it will immediately convert into alpha uranium, accelerating the chain reaction.
Because gallium is corrosive, it is necessary to use steam nickel plating on the nuclear charge to protect it at the same time.
The part that wraps the nuclear charge is U-238, which is larger than the calculated neutron reflection layer, with a thickness of 4.554 cm.
Then, in order to prevent free neutrons from harming the nuclear charge, the outer shell of the reflection layer is wrapped with a 3mm thick boron polyethylene plastic shell. The neutron absorption cross section of boron is extremely large, which can effectively protect the nuclear charge from the influence of external neutrons.
The outer layer is a "thrust body" made of aluminum, with a total diameter of 47cm.
Aluminum is easy to deform, and can effectively transmit the shock wave of the explosive to the inner layer, which is more effective. (Note: I added a small bug to the specific structure. Can you tell where it is?)
“.The second-to-last outer yellow part is high explosive, with a total diameter of 124.9cm. It is initially determined to be the CL20 mentioned by Comrade Xu Yun.”
Half an hour later.
There were already some fine beads of sweat on Lu Guangda's head, but his face was still excited:
"It is also worth mentioning that we have made two corresponding plans for the explosives according to the actual situation."
"The first plan is the situation mentioned above, that is, using CL20 as the detonator."
"But if the CL20 explosive cannot be successfully developed, then the debugging explosives of RDX and TNT will also be needed."
"We will temporarily call that explosive N1, and the preset common diameter is 144.2cm. This is also the only AB plan in the entire design process."
"These explosives are football-shaped geometric bodies, with a total of 32 pieces of explosives, but if it is just a single explosive, the implosion wave is arc-shaped. Thirty-two arc-shaped shock waves cannot compress the nuclear charge in a spherical shape at all."
"And the solution to this problem is the last layer of our design drawing, that is, the explosive lens structure calculated by Comrade Yu Min, which allows the shock wave to be "refracted" into a perfect circle."
Hearing Lu Guangda's words,
Many people cast their eyes on Dayu who was beside Xu Yun.
Dayu scratched his hair a little embarrassedly, smiled and nodded to the people around him, vaguely showing his shyness in later interviews.
The slow explosive used in the explosive lens he designed was Barato, which was made of 70% BaNO3 and 30% TNT, and the detonation rate ratio with CL20 was 8:3.
If CL20 cannot be produced and replaced with N1 explosives, as long as the detonator angle is corrected to 106°, it will be perfectly matched with this explosive.
Even Dayu made two other plans that were not in the rabbits' plan, but Xu Yun was no longer surprised by the cheating.
In fact, after getting used to winning by lying down, it seems to be quite refreshing?
On the other side.
Lu Guangda's introduction just came to the end:
"In short, these are the specific structural parameters of the atomic bomb. In addition, the total weight of this atomic bomb is 1420 kilograms, and the equivalent is about 20,000 tons."
Hearing this, Xu Yun in the audience also nodded.
In the original history.
The total weight of the rabbits' first atomic bomb was 1550 kilograms, but the proportion of detonating explosives was more than 90%.
Now Xu Yun has taken out the more powerful CL20, and the weight of explosives required has been reduced, so the total weight of the atomic bomb will naturally be reduced.
As for the detonation equivalent,
it was mentioned earlier.
There are three main nuclear reaction equations:
U+n→Nd+Zr+3n+8e+(ν-, antineutrino), U+n→Sr+Xe+2n, U+n→Ba+Kr+3n.
It is not difficult to see from these equations.
At the end of nuclear fission, the uranium nucleus may eventually form nuclei such as neodymium and zirconium, strontium and xenon, barium and krypton.
Since the mass decreases before and after the reaction, the reduced mass becomes the released energy.
On average, the energy produced by uranium fission is 3.2*10^-11 joules. According to the chemical formula, one kilogram of uranium is about 2.56x10^24 atoms.
Multiplying the two together, we get the energy produced by one kilogram of uranium fission, which is 8.2x10^13 joules.
That is, the nuclear fission of 1 kilogram of uranium is equivalent to the energy released when 18,000 tons of TNT explodes.
Lu Guangda and his team preset the total weight of U235 to be 5.1kg. According to the fission efficiency of 20%, the equivalent of 20,000 tons is quite reasonable.
In fact.
Originally, the equivalent of the first atomic bomb exploded by the rabbits in history was between 20,000 and 22,000 tons of TNT. Xu Yun's arrival only accelerated the progress at the technical level. The equivalent is directly linked to the nuclear charge - Xu Yun is not the administrator of Earth OL, and he does not have the ability to change the energy released by unit nuclear fission.
What he can do is to advance the birth time of nuclear weapons and change some other things that can or cannot be written in the main text.
In short.
At this point, the theoretical part of the atomic bomb is almost completely declared complete as Lu Guangda said.
The rest is the problem of parts production. These parts must be discussed, but obviously not today.
After all,
From the calculation of data to now, everyone on the scene has been overloaded for 22 hours.
In reality, many people would feel exhausted even if they did nothing for 22 hours without sleeping, not to mention that Lu Guangda and his team could only rest for less than an hour in these 22 hours.
So a few minutes later.
Lu Guangda took a sip of water from the water cup to moisten his throat, and quickly said:
"Okay, comrades, the above is the complete design of our atomic bomb."
"Now please allow me to announce as the head of the [Shangqing] project. The theoretical research of the atomic bomb is now completed! Thank you for your hard work!!!!"
The audience was silent for a moment, and then thunderous applause broke out.
Xu Yun was also among the members who applauded.
Although theoretical research cannot be regarded as the final victory of the decisive battle, the members of the base theory group have waited for this day for too long.
Xu Yun believed that it would not be long before the assembly of the atomic bomb parts would also bring news of victory, thus bringing the entire project into the final countdown.
A full minute passed.
After the applause subsided, Lu Guangda pressed his palm towards the crowd:
"Okay, comrades."
"It's getting early now. Since everything that needs to be explained has been explained, I think everyone should go home now. Let's talk about the rest another day."
Hearing this.
Yawns soon came from the audience, and Hua Luogeng next to Xu Yun even stretched.
Even young people like Dada and Cai Shaohui had strong fatigue on their faces.
Afterwards, everyone left their seats one after another and walked out of the basement in an orderly manner.
Lu Guangda and his assistant began to pack up the design drawings and prepare to start backing up overnight.
Xu Yun also returned to the hospital with the help of guard Mou Fangdong, and fell asleep soon after going to bed.
One night. No, it should be said that there was no talk for a day.
I don't know if it was because of the injury.
This time, Xu Yun slept for nearly 24 hours and just woke up a little heavy.
"Hmm"
The long sleep made Xu Yun's head a little dazed. After waking up, he subconsciously prepared to press the call bell beside the bed to call Qiao Caihong to change his clothes.
As a result, before his hand touched the call bell, Xu Yun caught a glimpse of something:
On the left side of his bed, there was a black shadow standing!
Xu Yun:
"?!"
Xu Yun's first reaction was that he thought that some readers came to urge him offline because he had not updated enough, but he soon realized that this was inside a copy!
And the 221 base has some buffs, so it is obviously impossible for monsters to appear.
In addition, the sky was somewhat bright at this time, and Xu Yun, who had calmed down, looked at the black shadow carefully in the light.
After a while.
Suddenly, Xu Yun's light exclamation sounded in the room:
"Hey, Dayu? Why are you here?"
That's right!
The black shadow that almost scared Xu Yun's heart was the familiar Dayu!
At this time, Dayu was originally leaning against the bed with his eyes closed, but he stood up straight after hearing the words:
"Comrade Xu Yun, you are awake."
"Yes, I just woke up."
Xu Yun leaned against the backrest of the nursing bed with some effort, looked at Dayu with some doubts and asked:
"Dayu, why are you so early in the morning..."
Dayu looked up at Xu Yun, took out a small notebook from his body, and explained:
"Comrade Han Li, to be honest, I have been thinking about a problem since I calculated the data yesterday."
"This problem has tortured me for a whole day and I can't think of the answer, so I came to ask you for help early in the morning."
"Oh?"
Xu Yun was immediately interested after hearing the words:
"What's the problem?"
Dayu's ability is like hanging on the wall, and Xu Yun is quite interested in the problem that he has been thinking about for two days without being able to figure it out.
Da Yu opened the small notebook in his hand, organized his words, and said to Xu Yun:
"I have been in charge of the theoretical research and development of hydrogen bombs recently. I suddenly found a problem in the theoretical process."
"The hydrogen bombs on the other side of the sea mainly use tritium, but the half-life of tritium is only 12.5 years, and the tritium reserves must be replaced every 6.5 years."
"In addition, according to the top-secret intelligence we got from the other side of the sea, the maximum cross section of tritium-tritium reaction calculated by the other side of the sea is 15 bar, but according to my calculation results, the cross section of all light nuclear reactions is absolutely impossible to exceed 5 bar."
“So I have been thinking about a question these days.”
“What role does tritium play in the explosion of a hydrogen bomb? If my calculations are correct, right?”
“In fact, can we ignore the tritium-tritium reaction and use other reactions instead?”
Note:
It is the last four hours of the update event. I don’t think I can reach 4,000 votes. If I can send 3,500 votes before 12 o’clock tonight, I will update 200,000 words this month.