Siheyuan: I eat melons while doing scientific research

Chapter 1101 Small things? Big things?
Small matter? If you can't talk about it on the phone, it's probably not a small matter, right?

Gao Zhendong complained in his heart, but he did not stop. He immediately got up, went downstairs and got into his car.

"Let's go to the Defense Working Committee!" Several GAZ vehicles that looked no different from ordinary GAZ-69s came out one after another and headed straight for the Defense Working Committee.

When he entered the leader's office, the leader immediately asked him to sit down.

"Look, you're an electronics expert, and I want to ask you, is there a switching device similar to a thyristor that can handle high voltage and high current?"

Hmm? It's really a small matter...

Gao Zhendong was a little confused. Why did he have to come to the committee specifically for such a small matter? Couldn't he have discussed it over the phone?

unless……

Back to one day ago, deep in the desert, a comrade in charge of the "ignition device" was holding a damaged device in his hand and frowned.

"The current and voltage are both high, which is within the critical range of this tube. The probability of the tube exploding is not low. If we want to change the explosive, this tube cannot be used anymore."

Strictly speaking, this is also a happy trouble. They now have a new type of explosive with higher density, greater power, faster detonation speed, but lower sensitivity. It can be regarded as a by-product of GAP propellant, or strictly speaking, it is an extended application of one of the components of GAP propellant.

As the "trigger" of thermonuclear weapons, ultra-high energy explosives with high density, high power and high detonation speed are beneficial to improving the performance of thermonuclear weapons "trigger".

And theoretically, lower sensitivity is a good thing. To be honest, this new type of explosive is not available elsewhere. It is not cheap and the output is not high. It can only be used unrestricted in the desert, so it is best to use it where it counts.

However, the problem lies in this "lower sensitivity", which means that a greater detonation energy is required to detonate the explosive.

"This new type of explosive is good, but the detonation energy requirement is higher. The original detonation energy is not enough. If the energy is increased, the current and voltage will increase. The original thyristor will not work, so we have to find a new one." The comrade in charge of the ignition device had a frown on his brow, but a smile on his face.

After all, compared with thyristors that can solve the problem by piling up materials, ultra-high energy explosives are more rare.

However, this is not a big deal, but it is a bit of a hassle, as the piling up of materials will bring more variables.

What most people cannot imagine is that, whether it is a fission bomb or a fusion bomb, except for the gun-type detonation principle, other detonation methods have very high requirements for the consistency of the fuse detonation delay.

The gun-type is simple, but its performance is poor. Except for the "Little Boy" eaten by the Japanese, the nuclear bombs in service of the five great good men are probably not gun-type. Moreover, the fission bomb based on the gun principle is difficult to use as the trigger of a fusion bomb.

As for the remaining implosion type, very high requirements are placed on the delay of the fuze detonation. They must be detonated simultaneously within a very small error and the fissionable material must be squeezed toward the neutron source in the center. Otherwise, some of the explosives will explode first, scattering and blowing the fissionable material away, making it impossible to detonate.

In fact, the delay required for the fuse to detonate the main charge must be less than x ns.

What has the best delay consistency? Naturally, it is electricity, electric fuse.

Moreover, the electric fuse here is not the electric detonator that most people think of. The electric detonator only uses electric heating wire to heat the explosive in the fuse, such as mercury fulminate, lead azide, etc. However, there is a problem here - the detonation process of these detonators is also uneven. This variation may not be very visible on a macro scale, but it appears too large in this application.

This results in that although the detonation signals arrive at the same time, when they finally detonate the main charge, the delay error may be far beyond the specified range. This becomes a Schrödinger's detonation, which may be fine or may not explode. This is undoubtedly unacceptable.

In fact, in situations where extremely high consistency in detonation delay is required, another detonation device is used.

——Explosive silk.

Simply put, this thing relies on a large amount of discharge to vaporize the conductor into plasma the moment the power is turned on. The plasma continues to conduct electricity, generating a large amount of heat and shock waves, and explodes completely, converting the input electrical energy into explosive energy.

There's no explosives in this thing! The energy source is a large, fully charged capacitor or set of them, and the "explosive" is a suitable conductor.

Theoretically, this thing is extremely safe. As long as you turn off the switch that charges the capacitor, it won't explode no matter how you mess with it.

Of course, this kind of high-end product with complex structure and high price cannot be used in ordinary weapons.

Under this requirement, large-scale discharge requires both high voltage and large current, which places extremely high demands on the electronic switch that controls the discharge.

Comrades are now facing this problem. The requirements are too high, the detonation is unreliable, and the pipes explode at any time. It would be fine if it exploded after completing the mission, anyway, this thing is a one-time deal, but no one can guarantee at which stage this thing will explode.

"Use a series-parallel structure? This will improve performance." A comrade suggested this, which is also a routine operation. The comrade in charge of the ignition device shook his head and said, "No, if possible, I still don't want to use a series-parallel structure. The complex structure will reduce reliability, and we also have to consider the consistency of the tubes. It's like the flood hasn't been sent away, and the beast may come again."

"Then split it into multiple paths? After all, electrical signals travel fast."

"The switching speed of thyristors is not fast, which is already an uncontrollable factor. If it is dispersed into multiple paths, it will be even more uncontrollable."

"Then... ask the comrades outside through the Defense Work Committee. Maybe they have a solution. Isn't the trouble with the new explosives caused by the comrades outside, hehe." A comrade laughed.

"Hey, you're taking advantage of me, hahaha. But your suggestion is good, it's always good to ask." The person in charge of the ignition laughed. This matter was not a big deal, nor was it a small one, so they were not too worried.

This is the reason why the Defense Work Committee brought Gao Zhendong's phone call from the Third Rolling Mill. This incident itself is a small matter, but the cause of this incident is a big deal.

For the Defense Working Committee, the best option is to ask Gao Zhendong about this matter first. This guy is familiar with the 12th Ministry of Machine Building. Although the comrades of the Defense Working Committee are not familiar with thyristors, they just need to know that this thing is part of electronics. Who else can they ask if not Gao Zhendong?
Gao Zhendong didn't know the origin of all this, but for such a small matter, he was directly asked to come for an interview with great fanfare. He knew with his butt that this was most likely something that happened in the desert.

"It's hard to say. Are there any specific requirements? What are the original parameters of the thyristor being replaced?" Gao Zhendong said.

The leader of the Defense Work Committee took out a piece of paper and handed it to him: "Read it yourself, don't take it away."

Gao Zhendong became even more certain of what he was thinking. If this thing hadn't come from the desert, he would have eaten the paper.

I quickly scanned the requirements above. It's actually very simple, with only a few words. This thing is not a complicated device.

After reading it, Gao Zhendong laughed. He knew where the problem lay.

This thing requires a fast switching speed, and the fast switching speed actually implies another meaning - high frequency!

If we only talk about power, the thyristor (silicon controlled rectifier) ​​is the best because it is the most clumsy. But if we add the switching speed, it has no advantage. Simply put, the thyristor with high power usually has a slow switching speed.

It may be possible to have very good thyristors, but our current thyristor technology is not very good.

When the power and frequency requirements are combined, the GTO, which has a lower power but much higher frequency, has something to say. It kills the thyristor.

Seeing Gao Zhendong smile, the leader of the Defense Work Committee also smiled. He was very familiar with this smile on Gao Zhendong's face. As long as he saw this smile, there was nothing to worry about - except having to pay attention to the occasion and control Gao Zhendong from speaking carelessly.

"Is there a door?"

Gao Zhendong nodded: "Yes, there is. This door is almost finished."

"Finished? When was it done?" The leader of the Defense Work Committee was shocked. How did you know that this thing was needed?

Gao Zhendong was confused: "This thing belongs to the 12th Ministry of Machinery. This kind of power electronic device has many uses. I have been working on it with them for a long time. The requirements of this document just happened to meet them."

The leader of the Defense Work Committee then remembered that this guy had done a lot of things in the 12th Ministry of Machine Building. High-performance electronic switches were extremely useful in the 12th Ministry of Machine Building. Whether the desert needed them or not, the 12th Ministry of Machine Building needed them anyway.

And this time, it was just a coincidence that they collided.

But no matter what, it's a good thing that the problem can be solved. He couldn't help but think of the rumored leader's evaluation of Gao Zhendong: a fierce general, a wise general, a lucky general. The leader is the leader, and this is really a lucky general, a lucky general who seizes his luck with his own abilities.

Although the problem was solved, Gao Zhendong still added: "However, there is no one that meets this specification. However, I can notify the comrades of the 12th Machinery Department to customize it. It's not a big problem."

"That's great! Do you have a good chance of success?" The leader of the Defense Work Committee was still very objective. Everything has the possibility of failure.

"Very big!" Gao Zhendong said firmly. Compared with real high-power applications, the power of this thing is nothing.

When Gao Zhendong said it was big, it really was. The leader patted him on the shoulder a few times and said, "That's great! I'll give you a great credit!"

He even laughed after he finished speaking. How many contributions did Gao Zhendong make? He had made countless contributions to the desert alone.

Gao Zhendong did not end the topic, he had something to say.

(End of this chapter)