Schematic diagram of the core star imitator of Map Lab?

Everyone present, including the elderly in the lead, was ticked to attract interest.

"Academician Wang said before that Map Lab has made a major breakthrough in the first inner wall material of the star imitator. This conclusion can be said to be yes or not."

Lu Yi took the laptop from Zhang Qing's hand and connected it to the projector to project the screen.

Seeing the schematic diagram on the projection light curtain, the experts present at the field nuclear fusion were stunned. What is the gap directly to the plasma operation track?

After waiting for a while, someone seemed to understand it, and a trace of shock flashed in his eyes. At this time, Lu Yi continued: "The first time I knew about this structural plan was when Map Laboratory announced the start of the demonstration reactor construction.

At that time, two engineers who dug up from Map Lab told us that Map Lab has always had this alternative. I later asked Tomorrow Group to use the capital relationship in Western Europe. After this period of hard work, I finally obtained this specific information.

Of course, being able to obtain such high confidential information so easily may be related to the reason why they did not pay too much attention to this information.

Because even if this design structure is made public, there are not many countries in the world that can be realized. For the time being, only Map Laboratory and their Germany are in place."

"I believe everyone knows the general structure of the imitation star device. From the inside to the outside, the orbit of the plasma is divided into the first inner wall, the lithium proliferation cladding, the cooling layer, the shielding layer, the vacuum chamber, and the outermost outer magnetic field coil, among which the filter also works on the first inner wall.

The biggest problem with star imitators in the past was that plasma turbulence could not be predicted, resulting in the shape of the constrained magnetic field that cannot be fully matched by the plasma.

This leads to a large number of plasmas with temperatures exceeding 100 million degrees Celsius permeating the magnetic field, forming a terrifying plasma radiation on the first inner wall, causing problems such as rapid rise in the first inner wall temperature.

The subsequent plasma turbulence model has been made, and the optimization control scheme allows the constrained magnetic field and plasma to be perfectly matched, which reduces plasma radiation by more than 99%.

Of course, if you don’t achieve perfection, you can’t achieve perfection. After all, even if the sun cannot perfectly bind all plasmas.

However, plasma radiation has dropped by more than 99%, which also means that this problem has been solved and has commercial standards. So the remaining problems of stellar devices are neutron radiation, tritium retention, tritium proliferation, recycling and recycling.

Nowadays, controlled nuclear fusion uses deuterium and tritium fusion. Deuterium can be extracted in seawater and the earth has a large content.

Because tritium has a half-life of only 12 years and is almost non-existent in nature, it can only be obtained through the reaction of neutrons and lithium. This situation makes tritium extremely rare and valuable.

If you want to commercialize controlled nuclear fusion, the first thing you need to face is to meet the repeated recycling of tritium, and the tritium recycling cycle is carried out through the reaction of neutrons and lithium produced by tritium deuterium fusion.

If this lithium neutron recovery system cannot meet the application standards, the tritium element in the reactor will become less and less, and the fusion reaction will eventually stop."

"In this case, Professor Lu, do you have any solutions to these problems?"

The energy bureau boss sitting under the head of the old man asked a question curiously.

"There are ideas, but the material performance is not up to standard."

Lu Yi shook his head and continued: "Deuterium-tritium fusion, a tritium and a deuterium fusion produce a helium nucleus plus a high-energy neutron containing 14MeV energy, and releases 17.6MeV energy.

The neutron energy released by deuterium-tritium fusion is too high. Strong neutron radiation will cause the inner wall material to fall off or even collapse, and get involved in the plasma to cause major safety accidents.

In addition to the denaturation and brittleness of the material, high-energy neutrons will also knock out vacuoles in the material like blowing a balloon. These vacuoles will form aggregation and retention problem of tritium produced by the reaction of neutrons and lithium, affecting the recycling of tritium.

To solve these problems, the first inner wall material must make breakthroughs, improve the material's resistance to neutron radiation, reduce the generation of cavitations, and transmutation products must also be non-radioactive products.

In addition, because the inner wall material faces high temperature plasma, this has high requirements for the heat resistance, thermal stress, heat dissipation performance of the inner wall material.

If the heat resistance is not good, the inner wall material will first not withstand the high temperature caused by discrete plasma radiation. If the thermal stress is not good, the material will denaturate as soon as the temperature increases.

If the heat cannot be dissipated in time and stabilized the temperature, one will cause the material to denaturate, and the other will be the lithium boiling point of the proliferation cladding only 1340 degrees Celsius, and the high temperature will directly cause the lithium metal to vaporize.

These demanding material performance requirements are the current difficulties of star-like devices. No material in the world can meet these performance indicators."

Lu Yi explained it very carefully, and his sentences were clear and clear, and the people present listened very seriously.

The Energy Bureau boss and the old man who didn't know much about these technical details had a relatively clear idea of ​​the current problems of imitation stellar devices.

"The material problem on the first inner wall has bothered us, and of course, Map Labs."

Lu Yi enlarged the schematic diagram on the screen and said, "This time they used a trick to solve this problem. They processed the ceramic material into a movable chain network structure, and then opened an opening on the imitation device and reached into it.

It is like a weaving cloth, spiraling around the outer diameter of the plasma orbit, and withstands the plasma radiation energy and then goes out again after it is irradiated.

Originally in the Spiral Stone 7-X Star Imitator, they used a 2mm ceramic interlayer.

But this time the demonstration reactor was redesigned and more space could be reserved in advance, so they used two 2mm ceramic mezzanine this time.

Inorganic non-metallic ceramic materials have good neutron penetration, which makes them not block neutrons, thereby affecting the recycling of tritium.

In addition, the poor thermal conductivity of ceramic materials was originally a factor that was eliminated by ceramic materials as the first inner wall material, but now it has become its advantage, which can absorb and bear more heat and gather inside it, transport more heat out of the outside.

Through the design data of this schematic diagram, we roughly calculated that after the barrier and heat removal of the two ceramic movable interlayers in the first two layers, the working temperature of the first inner wall can be reduced to between 500 and 600 degrees Celsius."

“500 to 600 degrees Celsius?”

Academician Wang and Professor Zhang and other nuclear fusion experts present couldn't help but exclaim, they understood what this temperature meant.
Chapter completed!