Massachusetts, MIT.

Although it was already 8 p.m., Professor Dennis White's "nuclear workshop" was still brightly lit and even bustling.

As director of the MIT Center for Plasma Science and Fusion, Professor Dennis White is a recognized leader in fusion research.

In addition to his academic attainments and prestige, Professor Dennis is most endearing to his students because he abandoned the traditional standard teaching at an early age—no longer focusing on lectures and PowerPoint presentations, but actively encouraged his students to find more ways to solve more practical problems.

Ten years ago, he assigned his students a task to modify the then clumsy and bulky tokamak of ITER (International Thermonuclear Experimental Reactor Program) using the second-generation high-temperature superconducting magnet REBCO.

Professor Dennis's teaching style has proven to be viable, at least among a group of students with high IQs and strong scientific interests.

After some hard work, his students came up with a steady-state tokamak device called "Vul".

Later, Professor Dennis tasked his students with completing a new, miniaturized, magnet-replaceable tokamak based on their previous design.

His students also worked on solving problems in a constant process of "asking questions", and finally, two years ago, they completed a small fusion device called SPARC.

The D-shaped magnet used to confine high-temperature ions is only 2 meters tall and 1 meter wide – about 1/8 the size of ITER, the International Thermonuclear Experimental Reactor (ITER) Cooperative Organization.

And half a year ago, Professor Dennis again proposed a task for his students.

——Understand the idea of the constraint trap proposed by the Oriental genius at an academic meeting, and cooperate with the article in the "Annals of Physics" to complete a bold attempt.

Only this time...... His students were a little crazy.

In the beginning, the students did not make any progress at all, and it was difficult to even understand Yeming's ideas.

It wasn't until September that YE-equation was officially announced.

As if a dawn to dispel the darkness, Professor Dennis's team took the lead in finding a set of spatial solutions at high field strengths.

They then got into the design.

……

"Professor, although there is no problem with the field strength, the silicon carbide substrate is a little unbearable."

Standing in front of the small, one-man-tall, four-meter-diameter fusion reactor that had been dismantled, Mongaard was both excited and worried. He was a professor for his Ph.D. more than ten years ago, and after graduation, he was recommended by Professor Dennis to go to Harvard, and just hired as an associate professor this year.

Because of his familiarity, Mongaard has also become the best leader of the Harvard-MIT joint team.

"What's the problem?" Professor Dennis looked at his "protégé" and continued to be persuasive.

Meng Jiade laughed: "Maybe it's a breakdown problem, maybe it's a migration or loss problem, it always has to be taken out and analyzed." ”

"Then wait for the analysis. That's right, you look here. Professor Dennis pointed to the reactor in the middle: "The escaping neutrons are doing a good job." ”

"But it's also well bound."

"Yes, otherwise why would it be called a miracle?"

Professor Dennis looked up as he spoke, and he looked at Professor Horrien, who was walking like a flyer.

“Gee。” Dennis opened his arms.

"There's no kung fu." Professor Hollyon refused to hug him, but only took the other person's hand and shook it for a moment, and then stood in front of the reactor.

"Is it because at 30 KeV, the YE field has decayed?" Professor Hollyon asked, looking at the reactor core, silent for a few seconds.

Professor Dennis and Mongard glanced at each other, the latter frowning slightly, hesitated for a few seconds and nodded, "Yes, but the restraint can be stabilized by pressurizing the restraint device." ”

"Walking on the Stars"

Professor Horion was silent, and exhaled softly after a moment.

"Questions?" Professor Dennis looked at his old friend, keenly aware that something was wrong with Professor Horryon.

"There's a little bit of a problem. I contacted Ye and he said that if you use silicon carbide, or gallium nitride, the problem of electron loss is very difficult to solve. ”

Professor Dennis was slightly stunned, and then frowned: "They made it?" ”

"No?"

......After a few seconds of silence, Professor Dennis laughed: "Then wait until we try - it's not that I don't believe in mathematics, but I think it's better to do it directly, face the problem, and solve the problem than to predict without a formula." ”

“……”

*

*

Provincial Jiaotong Auditorium.

Ye Ming did not tell everyone why he "couldn't go far".

He just gave a speech according to the content of the PPT step by step.

Finally, when the equation was fully expanded and described, Ye Ming began to turn a new page of PPT.

“…… Back to our constraint field. ”

As soon as his words fell, he saw that many scholars in the audience were obviously in high spirits!

He smiled.

"In a constrained field, there is an escape solution, or escape function. In the constrained field model, the solution is related to the breakdown field strength and electron mobility of the substrate. ”

Ye Ming said as he picked up the pen and walked to the whiteboard.

"Please vote for the whiteboard."

"Like here."

Ye Ming quickly established a constrained field model: "Let's substitute a few values at random...... Well, let's bring in the model of MIT's reactor that was announced to have been in operation for fifteen minutes. ”

They claim to have been reacting at 20 KeV for 15 minutes and ending at 30 KeV – if they're not short of money, they can consistently react to higher records and conditions. Then we have reason to believe that they have a problem at 30kev. ”

"What's the problem? Obviously constrained attenuation. ”

"So according to what I heard, the equivalent field strength they constrained is 30 Tesla, then according to the calculation, their electrode base material should be silicon carbide, because the gallium nitride base will be higher...... Energy is ......"

Ye Ming kept talking while writing down various data.

"Now expand the equation and let's do the math."

Ye Ming stopped his pen and looked at the entire whiteboard seriously.

In the audience, several mathematicians have begun to pick up their pens. But they gave up right away......

Because Yee's equation is a very complex system of equations after expansion, if you want to calculate it with a pen, you don't have half a draft book to think about it.

"Well, the values are as follows."

Ye Ming said that he didn't care about the shocking world, and directly wrote the data on a new whiteboard.

"These solutions are actually useless, we just need to look at this solution."

Ye Ming said and circled on a relational form.

"It's the escape electron relation, and I haven't found the right tool to describe it accurately, but it's clear that the function will have a threshold because of a few variables."

"That threshold is their end."