Into Unscientific

Chapter 646 Yu Da’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

Physicists who will be famous in later generations are all 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”

 “Please give in and leave a gap for me”

 “Hey, are there any people who get into other people’s crotches like you?”

“Look, this thing is so ingenious.”

“Look at area A2, 86.324. That should be the parameter designed by our team, right?”

“Xiao Zhou, wipe your saliva quickly, it’s almost dripping on me!”

　　　　　　　　　　　　　　　　　　　　　　　　　　　.

 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!

This round ball drawn on this drawing is the atomic bomb "Miss Qiu" that the rabbits are obsessed with.

design diagram!

"OK OK."

after awhile.

 Seeing that the crowd was likely to pounce on the drawings at any time, Lu Guangda quickly waved his hand and stepped in to control the scene:

“Stop it first! Just a reminder, this drawing is a real one-if anyone damages it, prepare to be punished!”

“If you really want to take a look, 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?”

“Now, everyone, please get back to your seats first, hurry up!”

Lu Guangda has been called "Doctor Doll" from 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 only lost their composure for a moment, and their basic sanity was not lost, so they quickly returned to their positions obediently one after another.

ˆ “.”

 After everyone has returned to their places.

Lu Guangda just put down his hands on his waist, and his tone gradually returned to calmness:

“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 Liverpool chased three goals in a row, and ultimately lost the game.”

“There are often a lot of uncertainties in everything in the world before results are achieved, 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 be 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.”

 There was a burst of chuckles from the audience soon.

really.

　　The drawings of the atomic bomb, 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", but in terms of the overall progress, they can only be regarded as less than half.

 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 is true for the atomic bomb.

Miss Qiu's health bar has been stripped off now, 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.

 Based on 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 is 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 inside of the shell, 1.5 mg of polonium-210 is precipitated using the precipitation method - that is, the reducing agent stannous chloride solution is used to precipitate polonium in the polonium chloride solution. Telluric acid can also be added to the polonium chloride solution in advance. As a carrier, after using stannous chloride to precipitate, polonium will co-precipitate with elemental tellurium, which is convenient for operation.

  The outer layer of the neutron source is made of nuclear charge uranium 235, with a total weight of 5.1kg and a diameter of 18cm.

 Those who have studied atomic bombs should all know this.

 When the crystal form of uranium is α phase, although the critical mass is small, it is easily brittle and is not conducive to mechanical processing.

 In this way, accidents may easily occur inside the nuclear bomb, or it may fail to detonate due to fragmentation.

Therefore, during the smelting process, it is necessary to add 3 to 3.5 mole fraction of gallium element (converted to 1 to 2% by weight) to turn the uranium into a delta phase that is not easily brittle.

Although the critical mass of delta phase uranium is not very low, it is already very close to the critical mass when thick uranium-238 is wrapped as a neutron reflection layer.

 At the same time, when the detonation wave of the outer explosive squeezes the nuclear charge, the density of delta uranium increases sharply, and it is immediately converted into alpha phase uranium, accelerating the chain reaction.

Because gallium is corrosive, nickel plating needs to be used on the nuclear charge by vapor method to achieve a protective effect at the same time.

 The part surrounding the nuclear charge is U-238 elemental substance, which is larger than the calculated neutron reflection layer and has a thickness of 4.554 cm.

In order to prevent free neutrons from harming the nuclear charge, the reflective 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 external neutrons.

 The outer layer is a “push body” made of aluminum, with a total diameter of 47cm.

 Aluminum is easy to deform and can effectively transmit the shock wave of explosives to the inner layer, with better effect. (Note: I added a small bug to the specific structure, can you tell where it is?)

“The yellow part of the penultimate outer layer 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.

 Lu Guangda's head had some beads of sweat on his head, but the look on his face was still exciting:

“It is also worth mentioning that for explosives, we have made a total of two corresponding plans based on the actual situation.”

“The first plan is the situation mentioned above, which is to use CL20 as the detonating explosive.”

“But if the CL20 explosive cannot be successfully developed, then RDX and TNT debugging explosives will still need to be used.”

“We temporarily call that explosive N1, and its preset common diameter is 144.2cm. This is also the only AB plan in the entire design process.”

"These explosives are football-shaped geometries. There are 32 pieces of explosives in total. However, just from a single explosive, the implosion wave is arc-shaped. Thirty-two arc-shaped shock waves are completely unable to compress the nuclear package in a spherical shape. medicine."

“The solution to this problem is the last layer of our design, which is the explosive lens structure calculated by Comrade Yu Min, so that the shock wave can be “refracted” into a perfect circle.”

 Hearing what Lu Guangda said.

　　Many people turned their attention to the person next to Xu Yun.

Yu Da scratched his hair in embarrassment, smiled and nodded around, and his shyness in later interviews was vaguely visible.

 The slow explosive used in the explosive lens he designed is Baratol, which is made of 70% BaNO3 and 30% TNT. The detonation rate ratio with CL20 is 8:3.    If CL20 cannot be produced and is replaced by N1 explosive, just modify the detonator angle to 106° to perfectly fit this explosive.

Even greater than that, he also made two other plans that were not in the rabbits' plan, but Xu Yun was already used to it.

 Actually, once you get used to it, it seems to be quite enjoyable?

 And the other side.

Lu Guangda’s introduction also came to the end:

“In short, these are the specific structural parameters of the atomic bomb. In addition, the total weight of the atomic bomb is 1,420 kilograms, and its yield 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 1,550 kilograms, but the explosives accounted for more than 90% of it.

Now that Xu Yun has come up with the more powerful CL20, the required weight of explosives has been reduced, and the total weight of the atomic bomb has naturally been reduced.

 As for the detonation yield

 Mentioned earlier.

 There are three main nuclear reaction equations:

ˆU+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, uranium nuclei may eventually form nuclei such as those of neodymium and zirconium, strontium and xenon, or barium and krypton.

 Since mass is reduced before and after the reaction, the reduced mass becomes the released energy.

On average, the energy produced by the fission of uranium is 3.2*10^-11 joules. According to the chemical formula, one kilogram of uranium is approximately 2.56x10^24 atoms.

 Multiply the two together to get the energy produced by the fission of one kilogram of uranium, which is 8.2x10^13 joules of energy.

 That is, the nuclear fission of 1 kilogram of uranium is equivalent to the energy released when 18,000 tons of TNT explosive explodes.

Lu Guangda’s preset total weight of U235 is 5.1kg. Based on the fission efficiency of 20%, the equivalent of 20,000 tons is quite reasonable.

 In fact.

Originally, the yield 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 yield was directly linked to the nuclear charge - Xu Yun was not The administrators of Earth OL do not have the ability to change the energy released by nuclear fission of a unit.

 What he can do is advance the date of the birth of nuclear weapons and change some other things that can or cannot be written in the text.

all in all.

At this point, the theoretical link of the atomic bomb has almost been completed, as Lu Guangda said.

 The rest is the issue of parts production. These discussions must be discussed, but obviously not today.

after all

 From the beginning of calculating the data to now, everyone on site has been working overload for 22 hours.

In reality, many people will feel exhausted even if they just do nothing for 22 hours without sleeping. Not to mention Lu Guangda and others, they rested on their heads for less than an hour during these 22 hours.

 So a few minutes later.

Lu Guangda picked up the water glass and took a sip of water to moisten his throat, and quickly said:

“Okay, comrades, the above is the complete design plan of our atomic bomb.”

“Now please allow me to announce as the person in charge of the [Shangqing] project that the theoretical research on the atomic bomb has been completed! Thank you for your hard work!!”

 Everyone in the audience was silent for a moment after hearing this, and then thunderous applause broke out.

 Xu Yun was also among the members who applauded.

Although theoretical research cannot be regarded as the final decisive victory, the members of the base's theoretical team have been waiting for this day for too long.

Xu Yun believes that it won’t be long before the assembly of atomic bomb parts will also receive news of success, thus bringing the entire project into the final countdown.

　A full minute passed.

After the applause had subsided, Lu Guangda pressed his palms towards everyone:

 “Okay, comrades.”

"It's already getting dark now. Since everything that needs to be explained has been explained, I think it's better for everyone to go back and let's talk about the rest another day."

 Hear this.

Yawns soon erupted from the audience, and Hua Luogeng next to Xu Yun even stretched.

Even a young man like Cai Shaohui has a strong look of exhaustion on his face.

 Then everyone quickly left their seats one after another and walked out of the basement in an orderly manner.

Lu Guangda and his assistants 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 not long after boarding the ship.

 One night. No, it should be said that there is nothing to say for one day.

I don’t know if it’s because of injuries.

Xu Yun slept for nearly 24 hours this time, and then he woke up slightly.

"Well"

The long sleep made Xu Yun's head a little dazed. When he woke up, he subconsciously prepared to press the call bell next to the bed and call Qiao Caihong to change his clothes.

As a result, before his hand touched the calling bell, Xu Yun caught a glimpse of something from the corner of his eye:

 I saw a black shadow standing on the left side of my hospital bed!

Xu Yun:

  “?!”

Xu Yun’s first reaction was that he had not updated enough and some reader came over to urge for updates offline, but he soon realized that this was within the dungeon!

  Furthermore, base 221 comes with certain buffs, and it is obviously impossible for monsters and monsters to appear.

In addition, the sky was somewhat hazy at this time, so Xu Yun, who calmed down, used the light to look at the black shadow carefully.

  A moment later.

 Suddenly Xu Yun’s voice sounded in the room:

 “Hey, Da Da? Why are you here?”

 That’s right!

This dark shadow that almost scared Xu Yun's heart into a heartbeat was the one Xu Yun was familiar with!

At this time, Da Da was leaning on the bed with his eyes closed and concentrating. After hearing this, he immediately stood up straighter:

 “Comrade Xu Yun, you’re awake.”

 “Well, I just woke up.”

Xu Yun leaned against the backrest of the nursing bed with some effort, looked at Yu Da with some doubts and asked:

 “Greater than, you are here early in the morning”

Yuda raised his head and glanced at Xu Yun, took out a small notebook from his body, and explained:

“Comrade Han Li, to tell you the truth, I have been thinking about a question since I was calculating the data yesterday.”

"This question has tortured me for a whole day and I still can't think of an answer, so I came to ask for your help early in the morning."

"oh?"

Xu Yun suddenly became interested when he heard this:

"what is the problem?"

 

Yu Da then opened the small book in his hand, organized some words, and said to Xu Yun:

“I have recently been responsible for the theoretical research and development of hydrogen bombs. During the theoretical process, I suddenly discovered a problem.”

“The hydrogen bomb across the sea mainly uses tritium, but the half-life of tritium is only 12.5 years, and the reserve tritium must be replaced every 6.5 years.”

“In addition, according to the top-secret information we received from the other side of the sea, the maximum cross-section of the tritium-tritium reaction calculated from the other side of the sea is 15 bar. According to my calculation results, it is absolutely impossible for the cross-section of any light nuclear reaction to exceed 5 bar.”

 “So I’ve been thinking about a question these days.”

“What role does tritium play in a hydrogen bomb explosion? If my calculations are correct, right?”

“In fact, can we ignore the tritium-tritium reaction and use other reactions instead?”

Note:

 It’s the last four hours of the extra update event. It’s estimated that 4,000 votes will not be reached. If 3,500 votes can be sent before 12 o’clock tonight, 200,000 words will be updated this month.

 (End of this chapter)