The neatly arranged Rubik's Cube in red, yellow and white colors fell quietly on the desk. Looking at the little thing that had just recovered, a vague inspiration flashed through Xu Chuan's mind, and a hint of bright color appeared in his pupils.

Holding the thermos cup in his hand, he hurried back to his small room.

For the stellarator fusion device, adjusting its overall structure is as difficult as adjusting the engineering strength of a reservoir dam.

If the adjustments are made in the direction of high intensity and perfection, there is still hope.

But if you want to weaken the dam in exchange for easier construction, the consequences are bound to be tragic.

Just like the hydropower station dam built by a certain third brother, if the strength is not enough, the dam will be destroyed even after a week of impoundment, causing people to die, causing a large area downstream to be flooded.

The structure of the stellarator is also designed in advance.

It guides the high-temperature plasma inside through a twisted three-dimensional structure and a three-dimensional external field coil, allowing it to run smoothly in the chamber.

The purpose is to increase the engineering difficulty in exchange for the operational stability of the plasma.

And if the structure and external field coil are adjusted, it will affect the strength of the confinement magnetic field and the operation of the plasma. If one is not done well, the hundreds of millions of degrees high-temperature plasma running in the reactor chamber will go out of control.

As for the consequences, refer to the JT-60SA controllable nuclear fusion experimental reactor of the Fusion Research Institute of the small island country QST.

Therefore, it is quite difficult to adjust the structure of the stellarator.

But this is not impossible!

.......

In the office, Xu Chuan quickly took out the manuscript paper from the drawer. The signature pen in his hand quickly fell on the manuscript paper, and his eyes flashed with excitement.

Rubik's cube, puzzle, reconstruction!

Without changing the strength and direction of the magnetic field, mathematical calculations are used to decompose the design process of the magnet winding and 1 permanent magnet block into designing each permanent magnet one by one, and then perform multiple iterations to obtain the optimal design. The iterative process includes local optimization

and global optimization to optimize engineering difficulty...

This method is completely feasible in theory.

He just needs to recalculate the external field constraint coil of the stellarator. It is even possible to optimize the shape of the original three-dimensional superconducting coil!

damn it!

Why didn't he think of this method before?!

.......

Time passes quickly,

Behind the desk, Xu Chuan's pupils were bloodshot, but his face was full of excitement.

The tip of the pen touched the paper gently, holding the ballpoint pen in his hand, and quickly wrote out mathematical formulas and basic calculation theories one by one on the white A4 paper.

The stellarator is a magnetic confinement nuclear fusion approach whose fusion triple product parameter is second only to the tokamak. Compared with the tokamak, the stellarator has the advantage of steady-state operation and avoids the main shortcomings of the tokamak.

The problem is that the plasma will break up during the process.

However, there are two main reasons why stellarators have not been the first choice for fusion reactor technology for a long time:

First, the ripple of the magnetic field of traditional stellarators is larger than that of tokamak, which results in its neoclassical transport level and high-energy particle loss level being higher than that of tokamak.

Second, the stellarator requires a three-dimensional structure of the coil, which is complex in structure, difficult to manufacture, and costly.

The former can be solved through numerical control models of plasma turbulence and forced constraints of superconducting materials with high critical magnetic fields, and for the latter, he has now found a way!

At least, in theory, it is completely feasible!

.......

I don’t know how much time passed, but a gurgling sound sounded in the quiet office.

Xu Chuan came back to his senses, touched his stomach that was complaining about being hungry and hurting, and couldn't help swallowing.

When I raised my head, I saw that the sun outside the window had set and the night was getting darker.

He looked at the time on his phone and saw that it was almost seven o'clock. Unknowingly, he had been sitting in the office for almost four or five hours.

Phew~

With a long sigh of relief, Xu Chuan stood up from the chair and stretched his muscles.

eat first!

People are like iron rice and steel. If you don't eat a meal, you won't be hungry.

Especially mental activities like his consume no less energy than physical activities.

As soon as he walked out of the office, Xu Chuan bumped into Zheng Hai, holding two bags in his hands.

"Hey, Professor, the sun has set, are you willing to come out?" Looking at Xu Chuan who walked out of the door, Zheng Hai had a flash of surprise in his eyes, and joked with a smile.

This person is a ruthless person who doesn't care about time and body when he does research.

Xu Chuan glanced at him, his eyes fell on the two bags he was carrying and asked curiously: "What are you carrying?"

"Your dinner."

Zheng Haiyan said briefly and concisely, and then added: "Tang Sijia reminded me that you haven't come out and you haven't had dinner. It's almost seven o'clock, so it's not a problem to do research while hungry."

Xu Chuan said "Oh" and turned around and entered the office again.

Since Zheng Hai brought him dinner, there was no need to go to the cafeteria.

He untied the plastic bag and took out the lunch box. Xu Chuan took a look at the dinner. There were three dishes and one soup in the two-layer lunch box, fried shrimps, stir-fried beef with green onions, stir-fried cabbage, and a pigeon soup. He lay down quietly.

over there.

This dish was much richer than when he went to the cafeteria to eat by himself.

But he doesn't care that much about food, as long as it can fill his stomach.

"Speaking of which, have you found a way to solve the problem?"

In the office, Zheng Hai also opened his own dinner, opened his disposable chopsticks, and asked casually.

Xu Chuan looked up at him and asked with a smile: "How do you know?"

Zheng Hai shrugged and said, "If you don't find an idea, you rarely sit in the office for several hours."

"Huh?" Xu Chuan looked over curiously.

Zheng Hai said with a smile: "I have been following you for several years. Under normal circumstances, you are a restless person. Unless you have research ideas on a certain problem, you will stay in the office or at home. At other times

, you prefer to go out for a run."

Hearing this, Xu Chuan thought about it carefully and found that what Zheng Hai said seemed to be right.

He can't sit still, and when he has nothing to do, he rarely stays in his room for several days at a time.

Smiling, he asked: "You are very careful in your observations. Speaking of which, I seem to have never asked you which family you are from. The army? The armed police? Or somewhere?"

Zheng Hai took a mouthful of food, swallowed it and replied: "No, I'm from Guo'an."

Xu Chuan nodded, thought of something again, and asked curiously: "How many can you fight by yourself?"

Hearing this question, Zheng Hai asked, somewhat dumbfounded: "Why are you suddenly interested in this?"

"I'm a little curious. After all, I've never seen you come over." Xu Chuan thought for a moment and said.

Maybe it's because the domestic environment is really safe. Anyway, Zheng Hai has been following him for four years and has never made a move.

Zheng Hai thought for a moment and then said: "For ordinary people, like you, professor, there should be no problem with a dozen or so."

Hearing these words, Xu Chuan's mouth twitched, okay, has he become a unit of measurement?

It's just that this person beat ten, which is really exaggerated.

But what he didn't know was that Zheng Hai was still being humble.

After all, the place where he came from was specially trained to protect important people at the leadership level. A dozen ordinary people without any training, as long as they were not completely surrounded in a very small space, would probably be just hot enough.

warm up?

........

In the office, the two of them were chatting.

At this moment, the mobile phone in Xu Chuan's pocket suddenly rang.

He took out his cell phone and took a look. It was Liang Qu from Xinghai Research Institute. He swiped his finger on the screen and Xu Chuan answered the call.

"Hey, Liang Qu, what's wrong?"

"Academician Xu, the testing and debugging of the Huaxing fusion device have been completed. When will the first operation start?" Liang Qu asked respectfully on the phone.

Xu Chuan: "Have all the relevant preparations been completed?"

Liang Qu nodded and quickly replied: "It's completed, and the first operation of Huaxing can be started at any time."

Hearing this, Xu Chuan thought for a moment and said, "In that case, it's better to do it sooner rather than later. Let's do it tomorrow morning. I'll get there."

Although the theoretical work in hand has not yet been completed, and the external field coils at Western Superconducting have not been fully produced, this does not affect the trial operation of the stellarator.

Helix-7X once set a record of two and a half hours of running time. After the debugged equipment was replaced with the first wall material, there was no problem at all in the simulated ignition experiment.

And they also need experimental operating data from the stellarator to adjust the numerical control model of plasma turbulence.
To be continued...