Top Student

"Some time ago, Academician Deng and I went to EAST in Luzhou to conduct some experiments. Through experiments, we found that there is a new substance that can generate a strong magnetic field in the plasma state, which can be used to realize controllable Magnetic Confinement for Nuclear Fusion Devices."

While talking about his recent achievements, Xu You projected the PPT he made on the big screen in front of him.

"The geometric model of the magnet of the traditional high-temperature superconducting tokamak device mainly includes the central solenoid coil and its compensation coil, as well as the poloidal field coil, etc. This is done by me through a two-dimensional axisymmetric model. Geometric model construction. Through this new scheme, the external magnetic field can be discarded, and the volume of the entire device can be greatly reduced."

Xu You's design scheme is very novel, and the whole design idea is different from all previous controllable nuclear fusion devices.

Following Xu You's further explanation, all the nuclear experts present became more and more approving of this plan.

Although Xu You's plan is different from several traditional plans, it has sufficient theoretical basis to support it.

The advantages of the program are also completely lacking in several traditional programs.

For some of the doubts, everyone also actively asked Xu You for advice.

"Professor Xu, how did you build such an optimization model?"

It was a nuclear physics expert from the Chinese Academy of Sciences who raised this question.

This expert has provided a number of theoretical achievements for the EAST project, and has even made more contributions than Dun Fu in the application of nuclear physics.

"I performed programming optimization by establishing a new algorithm. Establish a two-dimensional axisymmetric magnetic field finite element model, calculate the magnetic field distribution in it, and then transfer the magnetic field data to the model, and impose nonlinear constraints on the parameters to be optimized. "

While explaining his thinking, Xu You wrote down his analysis process of the objective function.

"Here is the magnitude and direction of the magnetic field generated by the plasma at different temperatures. By controlling the flow direction of the plasma, we can make the magnetic field generated by the plasma perfect for magnetic confinement."

According to the nature of this plasma, Xu You designed a diagram of the most suitable device.

This new device perfectly fits all conditions and can maximize the efficiency of nuclear reactions.

"Through simulations, the Q value of the new device is greater than 1, and the specific upper limit has not been accurately determined. But at least, this will be a controllable nuclear fusion device that achieves energy balance."

The Q value in controllable nuclear fusion refers to the ratio of energy output to input in the process of controllable nuclear fusion.

If the Q value is less than 1, it means that during the entire fusion reaction process, the output energy is not as much as the input energy.

Such a device cannot generate electricity at all.

Only when the Q value is greater than 1, it is possible to use controllable nuclear fusion to generate electricity.

Of course, in order to achieve real commercialization, the Q value must be greater than 10 as much as possible.

At this time, Qiao Sen thought of another question, raised his hand and asked:

"Professor Xu, the new device has also omitted the superconducting protection part?"

Qiao Sen didn't ask questions because of his special relationship with Xu You.

Xu You was also very satisfied with Qiao Sen's question, and quickly answered:

"Yes, the magnetic confinement method used by this new device is very special. Instead of using the magnetic field of an external magnet, it uses the magnetic field generated by the internal plasma. Therefore, superconducting protection is not required. But for superconducting For protection, we still need to continue research, because in the future, we may use two different magnetic confinement methods at the same time, so that the two magnetic fields can be superimposed."

"If superconducting protection is used, is it 202K high-temperature superconducting material?"

"Yes, because the superconducting critical temperature of this superconducting material is very high, dry ice can be used as a refrigerant, and the cooling cost is relatively low. Moreover, the superconductor is very close to the fusion plasma, and when the superconductor is working, it cannot withstand neutron bombardment and Activation. Choosing materials with a relatively high superconducting critical temperature can also better protect the superconductor machine."

"Okay, Professor Xu, I understand."

Qiao Sen was also very satisfied with Xu You's answer.

It was precisely because of his full confidence in Xu You that Qiao Sen dared to ask Xu You such obscure questions in public.

At this time, Chen Pingqiu also raised his hand.

"Professor Xu, for the inner wall material of the nuclear reactor vessel, are we using the same material as EAST?"

"This has not been determined for the time being, but it must be that the stronger the performance of the material, the better."

Hearing Xu You's answer, Chen Pingqiu felt a little proud.

Sure enough, Xu You hasn't finished all the work yet.

In this way, there is room for Chen Pingqiu to play.

"Okay, Professor Xu, I and other material experts in the project team will work together to develop better materials."

"Well, thanks to all the experts."

In fact, Xu You already had some ideas about the internal materials of the nuclear reactor.

However, when the idea was not yet mature, Xu You felt that it was better not to rush to talk about it.

After Xu You answered all the questions.

It was Lin Shi's turn to step forward and explain.

What Lin Shi wants to talk about is his discovery and various properties of this new type of plasma.

Because Xu You had already finished the main content, there was not much time left for Lin Shi.

In addition to explaining the results themselves, it is also to let everyone know a little bit about Lin Shi, so that Lin Shi can have a preliminary exchange with everyone.

"Hello experts, I am Lin Shi, a doctoral student at Jijing University, and let me explain the properties of this new type of plasma..."

It was the first time for Lin Shi to speak on such an occasion, and Lin Shi was still a little nervous.

And these experts in the audience were also a little surprised by the appearance of another young man.

However, when they learned that Lin Shi was Xu You's student and also the second runner-up of IPhO that year.

Such a thing is not so difficult to understand.

...

A young man wandered outside the police station for a long time.

It was the graduate student in Chen Pingqiu's lab.

After these days of torment, he finally couldn't bear it anymore.

At this point, if you walk in and admit what you have done, you will likely face severe punishment.

But if you leave here and continue to lose your way, you will never return.

will lead to a darker abyss.

In this tangled emotion.

On his forehead, fine beads of sweat could not help but ooze.

At this time, a public official in police uniform came out.

"Can I help you?"