In fact, when Peng Juexian led his team to France, Chang Haonan had already returned to Huairou Science City and began preparing for new hypersonic weapons tests and theoretical experiments on dual-mode ramjet engines.

Han Chenfeng will continue to be primarily responsible for research and testing related to nuclear batteries.

Therefore, the satellite communication request sent by the former was transferred several times before it finally contacted Chang Haonan who had just started work in China.

"Lao Peng, at this time... it should be two o'clock in the morning in France, right?"

Chang Haonan glanced at the time in the lower right corner of the computer screen, and at the same time took the thermos cup filled with hot tea from Xing Muchun:

"Why, have the negotiations with ITER achieved a breakthrough?"

"The seminar will not start until the day after tomorrow... oh, now it should be tomorrow, and the negotiations will be even later."

Peng Juexian's voice came with the rustling sound of electricity:

"But what you said is true, we have made some breakthroughs off the court."

There was a faint sound of shuffling papers in the background:

"There are some problems with the plasma waveform data released by the French at today's open forum. We can't take photos of the specific situation, but in short, we suspect that the ToreSupra device has suffered a sawtooth collapse phenomenon. Although there is no evidence, it is highly likely that there will be abnormal changes in the magnetic field topology structure... I am transmitting the relevant information, and you will receive it soon."

"Are you sure it's the collapse of the magnetic topology that caused the cascading instability?"

Chang Haonan stopped sliding his mouse:

"Also, has the Eastern Super Ring ever encountered a similar situation? I mean, by comparing our data, can we determine specifically how serious the problem with ToreSupra is?"

Peng Juexian immediately denied it:

"I haven't encountered it... or strictly speaking, I haven't had time to encounter it. The current magnetic fluid stability time of the Eastern Super Ring is still around 200 seconds. Even if there are hidden dangers, the sawtooth oscillation will not have time to develop into a large-scale sawtooth collapse, so we can only speculate at present."

"However, one of my doctoral students discovered that the coordinate axes on the PPT were deliberately compressed, and the actual amplitude was at least an order of magnitude larger than the displayed value... If there was no problem, they could have just taken out a normal picture, and there was no need to do this."

Perhaps because it was already late, Peng Juexian spoke a little faster than usual:

"And if their superconducting magnet system already has this level of magnetohydrodynamic oscillations, then upgrading WEST will only drag the problem onto the new device...But Robert Hull just announced at the meeting that 'there is a solution'."

Chang Haonan held the receiver and fell into deep thought.

The cost of encrypted satellite communications when providing external services is calculated by the second, but as the promoter of the construction of the Qingluan constellation, he naturally does not need to care too much about this.

After a while, he spoke again:

"Do you think there might be something wrong with the solution the French claim?"

"That's true, but that's not the point..."

Peng Juexian replied:

“The point is, I think the French want to use the Tokyo Institute of Quantum Science and Technology model to explain the sawtooth collapse, in exchange for priority in the ITER test cycle being shifted to them… and now there are signs that they may participate in the upgrade plan of the Japanese JT60SA test reactor.”

Chang Haonan raised his eyebrows:

"Didn't you say before that Japan would not be involved in the first testing cycle?"

There was a sigh from the other end of the phone:

"The past was the past, and the present is the present... If we maintain the status quo, I'm afraid it will be difficult for us to prevent this situation on our own. After all, the EU bears nearly half of all the costs of ITER, and the French have the highest say..."

"Of course, I have also asked my acquaintances here indirectly, and they told me privately that Tokyo's theory is completely based on the 'ideal assumptions' of numerical simulations, but there are currently no other options, so the proposal put forward by Hull on behalf of the French Academy of Sciences is currently the mainstream."

At this point, Chang Haonan probably heard some clues.

The French are probably not united internally, but currently one faction in favor of cooperation with Japan is dominant.

This situation was all too familiar to him.

When we negotiated aviation industry cooperation with the EU, the situation was almost exactly the same:

"So, you think we can solve this problem, or at least explain it theoretically?"

Peng Juexian was silent for two seconds:

"First, we need to determine whether the magnetic field structure distortion phenomenon we observed at Factory 504 can correspond to the problem encountered by ToreSupra... Current theories generally believe that sawtooth collapse and abnormal changes in magnetic field topology are independent associated phenomena. If..."

At this time, Chang Haonan had already opened the materials sent by the other party on his computer and continued:

"If we can prove that there is a relationship between the two, then our advantage will be very obvious. At least it can offset or even surpass Tokyo's advantage in theoretical research..."

"Yes."

Peng Juexian replied.

"Then...give me some time."

After Chang Haonan finished speaking, he hung up the phone.

After that, he quickly wrote down a series of criterion equations for sawtooth collapse on paper, and then called the Torch Laboratory:

"Yabo, help me solve a partial differential equation..."

……

Peng Juexian hardly slept all night and only closed his eyes in a daze when it was almost dawn.

But before he could fall asleep completely, he was awakened by the satellite communication alert sound.

“The model holds.”

Chang Haonan's voice was flat, as if he was saying something that he had expected:

"When the frequency ratio of the toroidal magnetic field to the poloidal magnetic field approaches a rational number, the spiral wave will induce a chain resonance in the plasma core... This can explain why the boundary localized mode burst suddenly appeared in the experimental data released by JT-60U last year..."

Peng Juexian slammed the armrest of the sofa:

"it is good!"

"This is nothing special. I can write a detailed proof process for you."

Chang Haonan’s response was very straightforward.

However, Peng Juexian did not respond immediately.

Because he knew that the other party must have something to say.

Sure enough, after a burst of mouse clicking sounds, Chang Haonan spoke again:

"But I want more than just an academic victory. If we can prove our level in the field of plasma steady-state research, what specific benefits can we gain?"

Peng Juexian had been thinking about this question for most of the day, and gave the answer almost without thinking:

"At least the first two cycles of testing will be given priority, and we can squeeze out Tokyo's plan for the first cycle, thereby extending the testing period by one third... In addition, no less than two-thirds of the time allocated to our country will be used for the lithium/oxygen vacancy research that Academician Chang is interested in."

Under such conditions, it is a sure win for both the Chinese delegation and Chang Haonan personally.

But the principles he has always adhered to are -

If you earn less, you lose money.

"From my personal perspective, it's fine. Two-thirds of the cycle should be enough to get large-scale test data... But Lao Peng, I think you can also make some other requests."

Peng Juexian had long heard about Chang Haonan's ability to blackmail people.

Then a new interest suddenly came:

"How to say?"

"Since the ToreSupra team plans to cooperate with Tokyo, they may also consider using the JT60 as a guinea pig...then they should choose some Japanese subsystems as future upgrade parts, right?"

"That's how it should be."

Peng Juexian was a little uncertain:

"But the specific parts will have to wait until later to be announced. And even if it's just a formality, there has to be a bidding process..."

However, Chang Haonan said in an indifferent tone:

"It doesn't matter. You can adapt to the situation as needed. In short, you must try your best to get us some component development tasks. They may not necessarily be very core, but they must require subsequent operation and maintenance, or at least a continuous supply of consumables, such as divertors, ion heating equipment, and superconducting magnet systems..."

"In this way, even if there is no follow-up to the ITER project, the operation of the WEST equipment still depends on our support!"