Technological power starts with upgrading lenses

Kang Chi in the video drank a sip of tea and continued: "The advantages of the magnetic confinement route are obvious. It can greatly reduce the requirements of experimental equipment for materials, and the time to maintain the fusion reaction can also be made very long." "But its disadvantages are also obvious. The energy efficiency ratio of magnetic confinement is too low. In order to maintain a high-intensity magnetic field, it needs to consume a lot of energy, and it is very difficult to improve the ratio of input and output." "In the early stages of nuclear fusion research, humans mainly rely on experimental verification, so tokamaks and stellarators can become the mainstream. Through these devices, we have indeed successfully "enclosed" nuclear fusion." "But "enclosed" alone is not enough. As nuclear fusion research gradually shifts from the early experimental stage to the commercial stage, the ignition time has actually gradually become less important, and the improvement of Q value is the real problem that needs to be solved in the future." "At this time, the shortcomings of the magnetic confinement device are It will become more and more obvious that this device that relies entirely on magnetic confinement is actually just a "shortcut" that was taken in the early stage to reduce material requirements..." Seeing this, Zhong Weijian couldn't help but pause the video and asked Cheng Tao: "What do you think?" Cheng Tao shook his head helplessly: "I remember that before Kang Chi became the chief engineer, I said that I felt that the tokamak had reached a dead end. "Although Kang Chi's joining has restored my confidence a little, if even he says so now, it means that this road may really not work..." When the Eastern Super Ring was first established, Cheng Tao was the most staunch and powerful supporter. As the chief technical consultant of the EAST project, he has devoted no less effort to the Eastern Super Ring than Zhong Weijian. Therefore, when Zhong Weijian heard what Cheng Tao said, his original firm belief in the tokamak was shaken at this moment. But he quickly suppressed this terrible thought.

He always believed that the path of scientific research is actually connected, the only difference is the degree of tortuosity of different routes.

Before the real results are out, no one can be sure which route is open or not, flat or tortuous.

After calming down, Zhong Weijian continued to read.

"So do you think that the current mainstream magnetic confinement device can't help us realize the commercialization of controlled nuclear fusion?"

A teacher from the Department of Physics of Su Province University quickly raised the question that Zhong Weijian wanted to ask most on the spot.

"I personally think so." Kang Chi gave a direct affirmative answer, "Of course, magnetic confinement is not without merit. In some links, the role of magnetic confinement is still irreplaceable, so the word I used just now is actually 'completely dependent on magnetic confinement'."

"In other words, you are optimistic about the combination of magnetic confinement and inertial confinement?"

"Yes." Kang Chi nodded and opened the next page of the PPT, "This is also what I will explain to you next, other non-mainstream controlled nuclear fusion technology routes."

"We already know that the conditions for nuclear fuel to undergo nuclear fusion are high temperature and high pressure, and these two conditions are strongly correlated. The greater the pressure, the higher the temperature. Big. " "So whether it is a magnetic confinement or inertial confinement device, in addition to controlling the energy after fusion occurs, the greater purpose is actually to generate high pressure to allow the device to produce nuclear fusion, which is commonly known as ignition." "Among them, because the magnetic pressure of the magnetic confinement device is limited, it has always relied on extending the reaction time. To put it bluntly, it is a slow fire. Therefore, the energy generated by nuclear fusion is relatively stable and inefficient, and a large amount of energy is required to maintain the magnetic pressure. " "Since the magnetic confinement is not strong and the efficiency is low, is it possible to help the device pressurize by adding external force? " "This is what the teacher just mentioned, the combination of magnetic confinement and inertial confinement. In professional terms, it is a magnetized Target device. "So to understand what a magnetized target device is, we must first know what magnetic confinement and inertial confinement are. " "I just mentioned magnetic confinement. It is the main direction at present, but the development of inertial confinement is not slow. Some schemes are even easier to implement than magnetic confinement in theory. " "Inertia means that by applying external force, nuclear fuel collides at a very high speed to produce a fusion reaction. In fact, hydrogen bombs are made using inertial confinement. " At this point, Kang Chi directly pulled over a blackboard and drew an ellipse on it: "This is a hydrogen bomb. We will first put an atomic bomb in it, and put lithium deuteride on the other side, and then detonate the inside. Atomic bomb. "

"After the atomic bomb explodes, it will emit high-energy X-rays. After these rays hit the outer shell, they will rebound and then gather on the lithium deuteride. The ablative material on the surface of the lithium deuteride expands and melts at high temperature, and the shock wave generated compresses the lithium deuteride inward. At the same time, the atomic bomb explosion will produce a large number of neutrons, which will react with lithium atoms and become helium + tritium. "

"Then a large amount of deuterium and tritium will move in the very small space of the hydrogen bomb, and then collide to cause nuclear fusion, so bang-the hydrogen bomb explodes. "

When the video is played here, you can imagine how many comments there are above...

"Is it okay to bang?"

"Fuck, is Mr. Kang teaching us how to make a hydrogen bomb?"

"I don't feel sleepy anymore!"

"Wow, live broadcast of making a hydrogen bomb? Mr. Kang, you are really a fool!"

"You're overthinking. Here is the mass-energy formula E=mc. Can you make an atomic bomb with it?"

"That's right. In fact, you can find the structure diagram of a hydrogen bomb by searching on the Internet, but how many countries can make a hydrogen bomb?"

"That's because they didn't listen to Mr. Kang's open class!"

"..."

Seeing the barrage of comments floating like snowflakes on the video, Zhong Weijian couldn't help but frowned: "How can I turn off these dense words?"

Cheng Tao: "..."

After Kang Chi introduced the principle of the hydrogen bomb, he wiped the whiteboard again and drew He drew a straight line and then drew an ellipse below it:

"Suppose this straight line is the ground. We dig a hole in the ground and throw a miniature hydrogen bomb into it, let it explode inside, and lock the energy released by the hydrogen bomb inside. Can we use this energy to generate electricity?"

"The professional term for this plan is called 'nuclear explosion fusion power station'. It was first proposed by the Los Alamos National Laboratory in the United States and is also the pioneer of the inertial confinement route."

"Later, Academician Peng of our country optimized this plan, making it more feasible."