Mr. Military Attache came in with a gadget with a flashing red light in his hand, and he carefully swept every corner of the room with this object, even under the sofa and in the vase, until half an hour later he was completely inspected of the room.

He nodded at Qin Feng, and quietly retreated, seeing that he didn't find anything, Qin Feng breathed a sigh of relief, he laughed twice and said, "Although the Cold War has passed for a long time now, the embassies and consulates of various countries have always been the focus of attention of the intelligence departments, and we should be careful!"

It doesn't seem to be enough to just look at the room, right? Now there are a lot of long-distance listening devices; as if hearing the question in Lu Qiujian's heart, Qin Feng explained again, "Just now, it was only indoors, and there are similar devices outdoors that block all of this room! No one else will know about the conversation here." ”

The former uses ultra-high-intensity lasers to irradiate the deuterium-tritium target in a very short period of time to achieve fusion, and the latter uses a strong magnetic field to confine the deuterium-tritium gas in a special magnetic container and heated to a high temperature of hundreds of millions of degrees Celsius to achieve fusion reactions. Lu Qiujian understood that the other party probably only knew the significance of this project, but did not necessarily understand its specific situation, so he started popularizing it first.

"The national ignition device of the United States is the use of inertial confinement nuclear fusion, this project has been under construction since 97, has invested 3.5 billion US dollars, and has not yet made a major breakthrough. "The International Thermonuclear Experimental Reactor (ITER) program, which China is negotiating with the European Union, India, Japan, South Korea, Russia and the United States, is expected to use the magnetic confinement fusion method." ”

"Well, I've heard about this project, and in 03 the Government Council approved our country's participation in the negotiations, if this plan can be implemented smoothly. It will play a huge role in promoting China's scientific and technological level!" Qin Feng interjected, now that he saw that the young man in front of him must have gone farther than them, right? Otherwise, it would be enough to directly participate in this plan, so why pretend to be mysterious and talk to himself about this?

"Whether it is the national ignition program of the United States or the international thermonuclear fusion reactor program, it will promote the progress of human research on nuclear fusion, and improve the development of superconducting technology, rare metal material technology, high-voltage technology and other high-end technologies......" Lu Qiujian said for a long time, but did not say anything about their prospects.

"But. After a bunch of appreciative words, it finally came to a turning point, "but what is certain is that none of them can achieve decisive results!"

"Why?" Qin Feng asked subconsciously.

"The reaction conditions of nuclear fusion require high temperatures of hundreds of millions of degrees in an instant, and only under such conditions will fusion reactions occur, then this premise leads to two difficulties. Lu Qiujian held up two fingers, "First." How to heat the fuel for nuclear fusion to this temperature; second, what do we need to install the fuel of hundreds of millions of degrees, you must know that the surface temperature of the sun is about 5,500 degrees; whether it is a national ignition device or an international thermonuclear reactor, there is no way to solve these two problems, so they may promote the development of science and technology in related fields, but there is still a long way to go to achieve controlled nuclear fusion!"

"They must also know these two difficulties, right?" Qin Feng asked.

"Regarding the first question, the national ignition device of the United States mainly relies on laser heating. Focusing the energy of multiple lasers on the same point is also the same method adopted by China's Shenguang project! It's like us using a magnifying glass to ignite paper!" These materials are all publicly available and not difficult to find, "As for how to hold the reactants, at present, the main thing is to confine the reactants in a closed ring and make them rotate at high speed. to fix it in a confined space, thus achieving a disguised bloom, which is the Tokmék installation, the French Tore-Supra. Russia's T-15, Japan's JT-60U, and China's EAST in Anhui Province all adopt this approach. ”

"It sounds like both problems can be solved. But the solution to these two problems is completely non-fused! If you want to heat the reactant in a short time, you need the reactant to be stationary and on the target of the laser, but the reactant is stationary and there is no way to confine it in a confined space!"

"Of course, some people have recently proposed a plan for cold nuclear fusion, which is to reduce the temperature required for nuclear fusion (Iron Man seems to use this method), but the reason why the sun's core can achieve fusion at a temperature of 15 million degrees is because there is enough pressure, and it is more difficult to achieve this level of pressure than to solve the above two problems!" Lu Qiujian finally finished talking about the technical difficulties of controllable nuclear fusion.

"So, how do you plan to solve these two problems?" After Lu Qiujian's explanation, Qin Feng also had a basic understanding of this problem, "Or do you have a new plan to avoid these two problems?"

"It's too difficult to solve these two problems, and I don't have a mature idea at the moment!" Lu Qiujian shook his head and said.

"So what is the small achievement you just mentioned?" Qin Feng was not disappointed, he knew the great significance of controlled nuclear fusion, if Lu Qiujian claimed that he had a perfect solution, he would have to doubt whether the other party's mental state was normal.

"Tritium!" Lu Qiujian unveiled his hole card, "Now the fusion reaction needs to continuously supply tritium, but tritium is not in nature, it needs neutrons and lithium reaction to produce, and now the world's industrial tritium production is only a few kilograms, which can not even meet the needs of the ITER program for a year, and I have found a theoretical way to increase the production of tritium! If this method proves to be effective, then the difficulty of producing tritium will be greatly reduced." ”

Seeing that Qin Feng was still pondering the significance of this achievement, Lu Qiujian continued, "I also have some ideas for the improvement of the existing tokmak device, but this will be determined when I see the tokmak device we are using now after returning to China!"

"I don't know much about these overly professional questions, but I guess there is information on the method you just said to increase tritium production, right? Can you let me take it back to the relevant departments for verification?" Qin Feng said.

After receiving an affirmative answer, he asked, "So, as a layman, I would like to ask, Dr. Lu, how much time do you think it will take for controlled nuclear fusion to be applied, and how long will it be if you are asked to preside over Huaguo's controlled nuclear fusion program?" )

PS: I'm updating automatically, and I'm going to change it three times today.