Great Country Academician

After the "Daxiao" fusion experimental reactor was sent to the Qixia Controllable Nuclear Fusion Engineering Base, Xu Chuan lived in the research institute of the base and personally directed the assembly and transformation of the experimental reactor.

The high-temperature copper-carbon-silver composite superconducting material produced by Western Superconducting Group was processed into a special shape and sent to the warehouse of the engineering base.

This work was done in advance. When the transaction of the ASDEX device was confirmed during the Chinese New Year, he asked the Planck Institute for Plasma Research for the detailed design drawings and structural drawings of the ASDEX device.

Then the research team made a design based on the relevant information, and the designed drawing data was sent to the production line of Western Superconducting Group as soon as possible, and processed into corresponding superconducting products. Before the ASDEX device was delivered, it had already been delivered. in the base.

According to the design drawings, the project base is brightly lit 24 hours a day, and people are busy working overtime.

In order to stably transform the ASDEX device into the "Daxiao Fusion Reactor", Xu Chuan has not left the Qixiashan project base for more than a month, eating, drinking, and messing with it.

But this month-long busyness is worth it. After the August 1st Festival, like a special gift, the engineers of the dawn project finally completed the assembly of the last set of coils under 24 hours of non-stop work. .

In order to assemble the high-temperature copper-carbon-silver composite superconducting material on the original ASDEX device, Huaguo Nuclear Industry Construction Group set up a huge gantry over 20 meters in the core plant, and provided a super-strong magnetic field in each group. On the outside of the guide assembly, a corresponding fixing device is also built.

These fixing devices firmly fix the superconducting components and the dawn fusion reactor at the starting position, the purpose is to prevent the displacement of the superconducting coils that provide a strong magnetic field or other accidents.

After all, what runs in the chamber of the controllable nuclear fusion reactor is an ultra-high temperature plasma with a temperature of hundreds of millions of degrees. If there is a deviation in the control of the magnetic field, I am afraid that the tragedy of the Sakura Kingdom will repeat itself.

This is why Xu Chuan required that the geology must be stable when selecting the site.

After a month of hard work, the assembly and transformation of the ASDEX unit was finally fully completed.

Standing in front of the huge "Daxiao" fusion reactor, not only Xu Chuan, but all the staff and researchers showed pride, hope, anticipation, hope and other emotions in their eyes.

Fortunately, the work was successfully completed!

All that remains is to turn on the fusion reactor and enter the next stage of the journey after completion of acceptance.

With a smile in his eyes, Xu Chuan glanced at the huge fusion pile in front of him, looked at Academician Peng Hongxi standing beside him, and gave an order:

"All groups are ready to start checking the installation of the Xiaoxiao fusion device, report the situation in time, and start the power-on operation according to the scheduled plan!"

Having been busy for such a long time and spending 300 million euros and a huge effort to buy back the ASDEX device, it is naturally impossible to let it sit idle here.

Strictly speaking, the first power-on operation is not an ignition operation experiment, it is just an acceptance after assembly.

As for the goal of acceptance, it is actually very simple.

The first is to check whether the assembled Dawn fusion device can operate normally, including injecting certain raw materials into the interior and raising the temperature to control its operation.

The second is to confirm whether the external field coil made of high-temperature copper-carbon-silver composite superconducting material can normally provide a huge magnetic field exceeding 40T.

These two points are the goals of the first power-on operation, and do not pursue the long running time.

As long as these two goals are achieved, it can be confirmed that the Dawn fusion device can start subsequent experiments.

If all goes well, Xu Chuan is going to officially start the real first round of ignition operation experiment on a special day!

2020.10.01.

This year's October 1 is quite special, it is not only the National Day, but also the Mid-Autumn Festival!

The country and the family are all reunited.

On days like this, congratulating the country with a breakthrough in controlled nuclear fusion engineering is definitely one of the most beautiful things.

As for the time, in fact, it didn't take long after all.

It is now close to mid-August, and there is still one and a half months to go. Acceptance tests and equipment maintenance and adjustments after the tests will be carried out in the middle.

It's not tight, but it's not loose either.

After Xu Chuan gave the inspection order, the engineers of the Lixiao fusion device engineering team moved quickly.

For him, checking the status of the equipment is just a word of mouth, but in fact it is a rather cumbersome thing.

From the main body of the dawn fusion device, to the supercomputing center that provides computing power, to the liquid helium and liquid nitrogen equipment for cooling, to the stability of the power grid that provides electrical energy, etc.

When the engineers of the dawn fusion device engineering team actually completed all the inspection work, it was the fourth day after the order was issued.

In the underground core area where the Lixiao fusion device is installed, all the staff members of the Qixia Mountain Controlled Nuclear Fusion Engineering Project are guarding their respective positions in full battle.

Standing in the main control room, Xu Chuan overlooked the dawn fusion device lying quietly on the wide ground through the huge monitoring screen. The huge reactor fell asleep like a giant steel beast, just waiting for an opportunity to wake up.

Although it was not the first time he stood in this position, his heart was throbbing and beating like never before.

No one knew that he had been waiting for at least ten years for this moment.

Walking to Xu Chuan's side, Han Jin, a student of Academician Peng Hongxi, who was in charge of the "Nuclear Beta Radiation Energy Concentration and Conversion of Electric Energy Mechanism" project before, also joined the controllable nuclear fusion project as Peng Hongxi's assistant.

At this moment, he was in charge of conveying the report to Xu Chuan on behalf of Academician Peng Hongxi: "Academician Xu, the comprehensive inspection of the Lixiao fusion device has been completed, and all equipment is normal without any problems, and the acceptance test can be carried out."

Hearing Han Jin's report, Xu Chuan nodded, took a deep breath, and calmly gave an order: "Start powering up!"

As the order to start the experiment was issued, the staff in the control rooms of each group quickly got busy.

The external current is stably supplied into the Xiaoxiao fusion device, and the valves of the pipelines connected to the storage of liquid nitrogen and liquid helium are opened, and the ultra-low temperature liquid helium and liquid nitrogen flow to different areas through different pipelines.

The high-temperature copper-carbon-silver composite superconducting material deployed in the field quickly reached the Tc critical temperature under the freezing of liquid nitrogen and liquid helium, as in countless previous experiments.

With the continuous input of strong current, the current passing through the superconducting coil in the external field began to increase rapidly and steadily, and with the "sizzling" sound of the strong current passing through the ordinary conductor, the external superconducting coil began to transform into a superconducting state.

At the same time, the strength of the confinement magnetic field and the various values ​​of the dawn fusion device fed back on the computer screen in the main control room began to rise continuously.

Looking at the confinement magnetic field rising all the way to 40T, Xu Chuan's tense face also brought a smile.

No matter how many times he has tested it before, no matter how many times he has used it in his previous life, when the high-temperature copper-carbon-silver composite superconducting material deployed on the Xiaoxiao fusion equipment shows its powerful performance as scheduled, he finally let go down.

40.21T!

The strength of the magnetic field that confines the plasma is one of the keys to controlling the turbulence of ultra-high temperature and high pressure plasma in the chamber of a controllable nuclear fusion reactor.

By superimposing the magnetic field strength of one hundred tesla, this is already 80,000 times the strength of the earth's magnetic field, which is more than four times that of the original ASDEX device.

Such a huge confinement magnetic field can further and more effectively control the plasma in the reactor chamber.

"The steady-state magnetic field strength has reached 40.21 Tesla, and the acceptance goal of the first stage has been achieved!"

In the main control room, the staff rang loudly with trembling and excited reports.

Not only this young researcher, everyone in the control room had joy on their faces.

The steady-state magnetic field of 40.21T has already broken the record of 25.72T of the most advanced all-superconducting tokamak nuclear fusion experimental device (EAST) in China.

In the main control room, Xu Chuan stood in front of the console. After confirming that there was no problem with the confining magnetic field and other components, he took a deep breath and continued to give instructions!

"Start the next acceptance process, inject helium three into the break dawn fusion device!"

When checking and accepting the controllable nuclear fusion reactor, a small amount of helium three gas is injected into the chamber, and then the temperature is continuously raised to heat it into plasma, which is used to verify whether the external confinement magnetic field can successfully control the plasma in the reactor chamber Body raw material is also a very critical step.

The reason why helium trifusion is used instead of deuterium-tritium gas as the raw material for DT nuclear fusion is because the conditions required for helium trifusion are more stringent.

In fact, to be precise, there is no strict temperature requirement for nuclear fusion to occur, only the intensity of the reaction and whether nuclear fusion can be maintained spontaneously.

For example, the temperature of the core of the sun is only 15 million degrees, but the hydrogen-helium nuclear fusion reaction has been taking place and maintained there.

However, on the earth, if the fusion reaction is to be maintained by means of controlled nuclear fusion, a high temperature of at least 50 million degrees is required.

As for the higher-level Helium III, if it is used for the next-level nuclear fusion, the temperature must be ten times or even higher than that of deuterium-tritium fusion.

Take the dawn fusion reactor in front of us as an example, deuterium-tritium gas can produce fusion phenomenon at a temperature of about 50 million degrees, while helium-3 needs to reach at least one billion degrees to produce fusion phenomenon under the same conditions.

As for the simple acceptance, it is definitely impossible to ignite the raw materials to fuse and output electric energy, and the relevant equipment has not been assembled yet.

Therefore, in order to prevent the experimental deviation caused by the spontaneous fusion phenomenon of the raw materials in the reactor chamber at a high temperature of hundreds of millions of degrees, it is most appropriate to use helium III, which requires a higher fusion temperature, as the experimental raw material.

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